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Tiwari, Shivam, Padate, Vinay P., Cubelio, Sherine Sonia (2023): Chirostyloid and galatheoid squat lobsters (Decapoda: Anomura) from Andaman and Nicobar Islands, India, with three new species. Journal of Natural History 57 (9-12): 520-556, DOI: 10.1080/00222933.2023.2192429, URL: http://dx.doi.org/10.1080/00222933.2023.2192429

Trapezionida aequispina sp. nov. (Figures 2 (e), 10, Supplementary Figure S3) Material examined Holotype. Ovigerous female (7.0 mm PCL, 6.0 mm CW) (IO/SS/ANO/00137), Andaman Sea, off Car Nicobar Island, FORVSS stn 355II04, 9.31°N 92.82°E, 109 m depth, Naturalist ̍s dredge, coll. Vimal Kumar K. G., 12. January 2017. Paratypes. 1 male (3.9 mm PCL, 3.5 mm CW) (IO/SS/ANO/00138), same data as holotype; 1 ovigerous female (6.6 mm PCL, 6.0 mm CW) (IO/SS/ANO/00139), Andaman Sea, off Car Nicobar Island, FORVSS stn 334II05, 9.24°N, 92.92°E, 315 m depth, Naturalist ̍s dredge, coll. Vinu Jacob, 28 January 2015. Etymology The species name is derived from two Latin terms ′ aequalis ̍ (adjective for ′equal̍) meaning equal-sized and ′ spina ̍ meaning spines, denoting the almost equal size of the distal spines of antennular peduncle article 1. Diagnosis Carapace with 6 pairs of epigastric spines and 2 median spines; hepatic, parahepatic, anterobranchial and postcervical regions each with 1 small spine; frontal margin transverse; anterolateral spine reaching sinus between rostrum and supraocular spines; branchial margins with 5 spines. Rostrum spiniform, 0.4 times as long as PCL, supraocular spines 0.4 times as long as rostrum. Pterygostomian flap with anterior margin terminating in 1 spinule. Thoracic sternite 4 with 2 pairs of oblique striae, anterior pair shorter, anterior margin widely contiguous to sternite 3. Sternites 5–7 each with 1 short stria anterolaterally, sternite 5 with 1 longitudinal stria midlaterally. Pleonal tergite 2 with 1–2 lateral spines on anterior ridge. Eye wider than sinus between rostrum and supraocular spine. Antennular peduncle article 1 bearing subequal distal spines. Distomesial spine of antennal peduncle article 1 reaching distal margin of article 3; distomesial spine of article 2 overreaching distal margin of article 4, mesial margin with short spine, distolateral spine not reaching distal margin of article 3; article 3 with minute distolateral spine. Mxp 3 merus with 3 flexor spines, extensor margin with distal spine. P1 length 2.7–3.1 times PCL, merus 4.1 times as long as wide, with 10 spines on dorsal surface, 3 spines on mesial margin, 2 rows of spines on ventral surface; palm 3.1 times as long as wide, dorsal surface with 2 rows of small spines, dorsomesial margin spinose; fingers subequal to palm length, fixed finger with 2 spines on dorsolateral surface, 2 subdistal spines on lateral margin, dactylus with short proximal spine, 2 subdistal spines on mesial margin, 2 spines on dorsomesial surface. P2–4 squamate with iridescent setae on margins; dactyli 0.7–0.8 times as long as propodi, proximal one-fifth of flexor margins unarmed, distal one-third only with slender subterminal spine closely appressed to unguis. Description of holotype Carapace. PCL 1.2 times width, dorsal surface slightly convex transversely; main transverse ridges mostly uninterrupted; ridges and striae with dense short setae and a few longer setae. Gastric region with 6 pairs of epigastric spines and 2 median spines. Cervical grooves distinct. Hepatic, parahepatic, anterobranchial and postcervical regions each with 1 small spine; lateral part of posterior branchial region with 8 transverse ridges including posterior submarginal ridge. Intestinal region without stria. Frontal margin transverse. Anterolateral spine reaching sinus between rostrum and supraocular spines, followed by 3 shorter spines on anterolateral margin. Branchial margins with 5 spines (Figures 2 (e), 10(a,b)). Rostrum spiniform, 0.4 times as long as PCL, directed nearly horizontally in lateral view; lateral margins slightly crenulated distally; supraocular spines moderately long, slender, parallel in dorsal view, 0.4 times as long as rostrum (Figures 2 (e), 10(a,b)). Pterygostomian flap with long and short transverse ridges, anterior margin terminating in 1 spinule (Figure 10 (b)). Sternum. Sternal plastron widest at sternite 7. Thoracic sternite 3 4.3 times as wide as long, half as wide as sternite 4; anterior margin granulate, with 2 lobes separated by wide V-shaped median notch. Sternite 4 with 2 pairs of oblique striae, anterior pair shorter than posterior pair, anterior margin widely contiguous to sternite 3. Sternite 5 with 1 short transverse stria anterolaterally and 1 short, longitudinal stria midlaterally; sternites 6 and 7 with 1 short transverse stria anterolaterally; each sternite with row of short setae on anterior ridge (Figure 10 (e)). Pleon. Smooth (Figure 10 (d)), tergites 2–4 each with deep median transverse groove; tergite 2 with 1 lateral spine on each side of anterior ridge, 1 uninterrupted transverse stria anterior to, and 2 uninterrupted striae posterior to, transverse groove; tergite 3 with 2 uninterrupted transverse striae each anterior and posterior to transverse groove; tergite 4 with 2 uninterrupted transverse striae anterior to, and 1 medially interrupted stria posterior to, transverse groove. Tergite 5 with 4 uninterrupted transverse ridges, posterior ridge shortest. Tergite 6 with 2 squamiform ridges interrupted medially and laterally. Telson wider than long, longer squamiform ridges on anterior half (Figure 10 (e)). Eye. Eye moderately large; cornea dilated; maximum diameter 2.9 times distance between rostrum and supraocular spine, 0.4 times distance between anterolateral spines, 0.2 times PCL. Ocular peduncle with 1 stria on dorsal surface; eyelash long (Figure 10 (a)). Antennule. Antennular peduncle article 1 2.0 times as long as wide; reaching distal corneal margin; distal spines subequal in length; lateral margin with 2 spines, first lateral spine distinctly overreaching distal spines, second lateral spine very short, located anterior to midlength of article; ventral surface with a few scattered, short squamiform ridges (Figure 10 (f)). Antenna. Antennal peduncle reaching distal margin of cornea. Article 1 with distomesial spine reaching distal margin of article 3. Article 2 with distomesial spine overreaching distal margin of article 4, mesial margin armed with short spine; distolateral spine not reaching distal margin of article 3. Article 3 with minute distolateral spine. Article 4 unarmed (Figure 10 (f)). Mxp 3. Ischium 1.9 times as long as merus, disto-flexor and disto-extensor angles terminating in sharp spine. Merus flexor margin with 3 spines decreasing in size distally, extensor margin with distal spine. Carpus, propodus and dactylus unarmed (Figure 10 (g)). P1. Length 3.1 times PCL, surfaces with numerous squamiform ridges of various sizes bearing short setae. Ischium unarmed. Merus 4.1 times as long as wide; dorsal surface with irregular row 10 spines increasing in size distally; mesial margin with 3 spines increasing in size distally; ventral surface with 2 rows of spines, first row with 2 large spines under mesial row of spines, second row with 5 smaller spines; distal margin with 4 spines (dorsal, mesial, ventromesial and lateral spines; dorsomesial spine strongest, ventromesial spine smallest); lateral margin unarmed. Carpus 2.4 times as long as wide, 0.9 times as long as palm; dorsal surface with 1 row of 6 spines; mesial margin with 5 alternately large and small spines, flanked by dorsomesial row of 6 spines; lateral margin unarmed; ventral surface with 2 spines, ventrolateral distal angle produced in rounded lobe, armed with blunt spinule (Figure 10 (h)). Palm 3.1 times as long as wide; dorsal surface with 2 rows of 5–6 small spines and 1 spine at dactylar articulation; ventral surface with 1 spine at dactylar articulation; dorsomesial margin with 5 large and 3 small spines; dorsolateral margin unarmed. Fingers subequal to palm length, terminating in sharp claws crossing distally; dorsal surfaces with scattered short setae; fixed finger with 1 row of 2 spines on dorsolateral surface, 2 subdistal spines on lateral margin, occlusal margin denticulate, with slightly larger teeth at regular intervals. Dactylus with short proximal spine, 2 subdistal spines on mesial margin, dorsomesial surface with 2 spines (Figure 10 (i)). P2–4. Compressed, lengths 2.1, 1.7 and 1.7 times PCL, respectively, surfaces squamate with iridescent setae on margins. Meri 0.8, 0.5 and 0.5 times as long as PCL, respectively, 6.4, 4.2 and 3.3 times as long as high, respectively; extensor margins with 9, 6 and 6 spines, respectively, distal spine longest; flexor margins with 3 spines on P2, 1 spine and 2 spinules on P3, 1 spine and 3 spinules on P4, distal spine longest. Carpi with 4, 3 and 3 spines on extensor margin, distal spine longest, flexor margin with 1 spine. Propodi 6.8, 5.0 and 5.4 times as long as wide, respectively, extensor margins unarmed, flexor margins with 11, 11 and 10 movable spines (including distal pair of spines), respectively. Dactyli 0.7, 0.8 and 0.8 times as long as propodi, respectively, flexor margins with 9, 8 and 7 movable spines, respectively, proximal one-fifth unarmed; distal one-third only with slender subterminal spine closely appressed to unguis (Figure 10 (j–l, p)). P2 dactylus 4.2 times as long as wide. Variation in paratypes Carapace with 2 spines posterior to anterolateral spine in both paratypes. In the female paratype, tergite 2 with 1 (right) to 2 (left) spines on anterior ridge. In both paratypes, the antennal peduncle article 3 has a short, distinct distolateral spine. In the female paratype, P1 length 2.7 times PCL. Distribution Presently known only from Andaman Sea, 109–315 m depth (Figure 1). Remarks Trapezionida aequispina sp. nov. shares the presence of spines only on lateral portions of the anterior ridge of the pleonal tergite 2, large corneas, 5 marginal branchial spines, antennular peduncle article 1 with subequal distal spines and the distomesial spine of antennal peduncle article 2 overreaching the article 4 with T. canopus Macpherson, Rodriguez-Flores and Machordom, 2020b, T. disiunctus Komai, 2011 and T. japonica Stimpson, 1858 from Japan. Additionally, T. aequispina sp. nov., T. canopus and T. japonica share the presence of 3 flexor spines and 1 disto-extensor spine on the merus of Mxp 3; T. aequispina sp. nov., T. canopus and T. disiunctus further share the presence of a spine-like seta appressed to unguis of P2–4 dactyli. Nevertheless, the new species can be distinguished from the latter 3 species in the following characters: (1) Carapace armed with 2 median epigastric spines and 1 hepatic spine (vs median epigastric spine absent in T. canopus; hepatic spines absent in T. canopus and T. japonica); (2) Thoracic sternite 4 with anterior margin widely contiguous to sternite 3 (vs sternite 4 with anterior margin contiguous along one-third of its length in T. japonica); (3) Thoracic sternites 5–7 each with a few transverse striae (vs striae absent in T. disiunctus and T. japonica); (4) Pleonal tergite 2 with 1 or 2 spines on each side of anterior ridge (vs anterior ridge unarmed in M. disiunctus; 2 spines on each side in T. canopus and T. japonica); (5) Mxp 3 merus with distinct disto-extensor spine (vs disto-extensor margin unarmed in T. disiunctus); (6) P2–4 dactyli relatively shorter, broader (4.0 times as long as wide), with distinctly curved tips, flexor margins only with spine-like seta appressed to unguis along distal third (vs P2–4 dactyli relatively longer (> 5 times as long as wide), narrower, gently curved in T. canopus, T. disiunctus and T. japonica; flexor margins unarmed along distal two-fifths in M. japonica).

Grimothea sp. (Figures 2 (c), 7) Material examined 1 female (3.2 mm PCL, 2.7 mm CW) (IO/SS/ANO/00143), south-eastern Bay of Bengal, off South Andaman Island, FORVSS stn 334I09, 11.79°N, 92.34°E, 147 m depth, Naturalist̍s dredge, coll. Vinu Jacob, 14 January 2015. Description Carapace. PCL 1.2 times width, dorsal surface gently convex transversely; main transverse ridges mostly uninterrupted; ridges and striae with dense short setae and a few longer iridescent setae. Gastric region with 5 pairs of epigastric spines and 1 median spine. Cervical grooves distinct. Hepatic region with 2 spines, posterior spine located adjacent to parahepatic spine; anterobranchial and postcervical regions each with 1 small spine; lateral part of posterior branchial region with 7 transverse ridges including posterior submarginal ridge. Intestinal region without stria. Frontal margin sinuous, strongly oblique, with sharp ridge running obliquely from lateral base of supraocular spine up to level of parahepatic spine. Anterolateral spine not reaching sinus between rostrum and supraocular spines, followed by 1 distinctly shorter spine on anterolateral margin. Lateral margins subparallel; branchial margins with 5 spines (3 on anterior branchial margin, third spine minute; 2 on posterior branchial margin); third spine smallest (Figures 2 (c), 7(a,b)). Rostrum spiniform, 0.4 times as long as PCL, directed nearly horizontally in lateral view; dorsal surface sparsely covered with short scales, lateral margins slightly crenulated along distal portion; supraocular spines moderately long, slender, parallel in dorsal view, half as long as rostrum (Figures 2 (c), 7(a,b)). Pterygostomian flap inflated, partially visible in dorsal view, with long and short transverse ridges, anterior margin terminating in 1 spinule (Figure 7 (a,b)). Sternum. Sternal plastron widest at sternite 7. Thoracic sternite 3 4.8 times as wide as long, 0.4 times as wide as sternite 4; anterior margin serrated, with 2 sinuous lobes separated by wide V-shaped median notch. Sternite 4 with anterior margin contiguous to sternite 3 along half of its length. Sternites 4–6 smooth; sternite 7 lateral portion with granular patch (Figure 7 (c)). Pleon. Smooth, tergites 2 and 3 each with deep median transverse groove; tergite 2 with 8 spines on anterior ridge (Figure 7 (a)); tergite 4 smooth, with 1 pair of minute submedian pits anteriorly; tergite 5 with 2 pairs of minute submedian pits alternating with 2 uninterrupted transverse ridges, posterior ridge longer; tergite 6 with 1 medially interrupted squamiform ridge. Telson wider than long (Figure 7 (d)). Eye. Moderately large; cornea dilated, lightly pigmented; maximum diameter 4.2 times distance between rostrum and supraocular spine, 0.4 times distance between anterolateral spines, 0.3 times PCL. Ocular peduncle without striae on dorsal surface; eyelash short (Figure 7 (a)). Antennule. Antennular peduncle article 1 2.2 times as long as wide, distinctly overreaching distal corneal margin; distomesial spine shorter than distolateral spine; lateral margin with 2 spines, first lateral spine distinctly overreaching distal spines, second lateral spine very short, located anterior to midlength of article; ventral surface with a few scattered, short squamiform ridges (Figure 7 (e)). Antenna. Antennal peduncle insertion visible in dorsal view, peduncle not reaching distal corneal margin. Article 1 fused with lateral margin of epistome (Figure 7 (e)), distomesial spine reaching distal margin of article 2. Article 2 with distomesial spine overreaching distal margin of article 4, mesial margin armed with short spine; distolateral spine overreaching distal margin of article 3. Articles 3 and 4 unarmed (Figure 7 (e, f)). Mxp 3. Ischium length 1.8 times as long as merus, disto-flexor and disto-extensor angles terminating in sharp spine; crista dentata with 20–21 denticles. Merus flexor margin with 2 spines, proximal spine located at midlength distinctly longer, disto-extensor angle unarmed. Carpus, propodus and dactylus unarmed (Figure 7 (g)). P1–4. Missing. Distribution Presently known only from Andaman Sea, 147 m depth (Figure 1). Remarks The unidentified specimen is here assigned to Grimothea because of the fusion of the first antennal peduncle article with the lateral margin of the epistome, and the unarmed, inflated pterygostomian flap visible in the dorsal view (although the latter character is seen only in a few congeneric species) (Machordom et al. 2022). Like G. krishaha sp. nov., this specimen is morphologically close to G. lipkeholthuisi (Hendrickx and Ayón-Parente, 2010) and M. macrobrachia (Hendrickx, 2003) from the Eastern Pacific Ocean. Further, Grimothea sp. differs from G. krishaha sp. nov. in the following characters: (1) Carapace with 2 hepatic spines (vs 1 spine in G. krishaha sp. nov.); (2) Frontal margin sinuous, strongly oblique with sharp ridge running obliquelyposteriorly from lateral base of supraocular spine to parahepatic spine (vs frontal margin slightly oblique, without sharp ridge in G. krishaha sp. nov.); (3) Anterolateral spine not reaching sinus between rostrum and supraocular spines (vs reaching sinus in G. krishaha sp. nov.); (4) Pleonal tergites 2–3 with deep median transverse groove; tergite 4 smooth (vs tergites 2–4 with deep median transverse groove in G. krishaha sp. nov.); (5) Distomesial spine of antennular peduncle shorter than distolateral spine (vs distal spines subequal in length in G. krishaha sp. nov.). In addition to the above, it resembles G. lipkeholthuisi in the presence of a granular patch laterally on thoracic sternite 7 and a transverse row of spines on pleonal tergite 2. Moreover, it shares the absence of spines on the posterior margin of carapace with G. macrobrachia. Morphological differences from the Eastern Pacific species are mentioned above in the ′Remarks̍ for G. krishaha sp. nov., Published as part of Tiwari, Shivam, Padate, Vinay P. & Cubelio, Sherine Sonia, 2023, Chirostyloid and galatheoid squat lobsters (Decapoda: Anomura) from Andaman and Nicobar Islands, India, with three new species, pp. 520-556 in Journal of Natural History 57 (9 - 12) on pages 534-536, DOI: 10.1080/00222933.2023.2192429, http://zenodo.org/record/7975359, {"references":["Machordom A, Ahyong ST, Andreakis N, Baba K, Buckley D, Garcia-Jimenez R, McCallum AW, Rodriguez-Flores PC, Macpherson E, Wolfe J. 2022. Deconstructing the crustacean squat lobster genus Munida to reconstruct the evolutionary history and systematics of the family Munididae (Decapoda, Anomura, Galatheoidea). Invertebr Syst. 36 (10): 926 - 970. doi: 10.1071 / IS 22013.","Hendrickx ME, Ayon-Parente M. 2010. A new species of Munida Leach (Decapoda, Galatheidae) from off the West coast of Baja California, Mexico. In: Fransen CHJM, De Grave S, Ng PKL, editors. Studies on Malacostraca: lipke Bijdeley Holthuis Memorial Volume. Crustaceana Monographs. Vol. 14; p. 305 - 314. doi: 10.1163 / 9789047427759 _ 020.","Hendrickx ME. 2003. The temperate species of the genus Munida Leach (Crustacea, Decapoda, Galatheidae) in the east Pacific, with the description of a new species and additional records for tropical-subtropical species. Bull Inst R Sci Nat Belg. 73: 115 - 136."]}

Grimothea krishaha sp. nov. (Figures 2 (b), 6) Material examined Holotype. Female (3.5 mm PCL, 2.7 mm CW) (IO/SS/ANO/00134), Andaman Sea, off Car Nicobar Island, FORVSS stn 334II05, 9.29°N, 92.91°E, 315 m depth, Naturalist ̍s dredge, coll. Vinu Jacob, 28 January 2015. Paratypes. 2 males (3.8, 3.8 mm PCL, 3.0, 3.2 mm CW) (IO/SS/ANO/00135), 1 female (3.1 mm PCL, 2.4 mm CW) (IO/SS/ANO/00136), same data as holotype. Etymology The species name is derived from the Sanskrit term ′ krśah ̍ meaning slender, denoting the relatively narrow carapace. Diagnosis Carapace with dorsal ridges mostly uninterrupted, a few ridges bearing long iridescent setae. Gastric region with 5 pairs of epigastric spines and 1 median gastric spine; hepatic, parahepatic, anterobranchial and postcervical regions each with 1 small spine; frontal margin slightly oblique; anterolateral spine reaching sinus between rostrum and supraocular spines; branchial margins with 5 spines; posterior margin unarmed. Rostrum spiniform, 0.4–0.5 times as long as PCL, supraocular spines 0.4 times as long as rostrum. Pterygostomian flap laterally inflated, partially visible in dorsal view, anterior margin terminating in 1 spinule. Thoracic sternite 4 with 2 short median striae and 1 pair of long submedian striae, anterior margin widely contiguous to sternite 3. Sternite 7 with granular patch laterally. Pleonal tergites 2–4 each with deep median groove, tergite 2 with 4 pairs of spines on anterior ridge. Eye wider than sinus between rostrum and supraocular spine. Antennular peduncle article 1 bearing subequal distal spines, first lateral spine overreaching distal spines. Antennal peduncle insertion visible in dorsal view, article 1 fused with lateral margin of epistome; distomesial spine of article 1 overreaching distal margin of article 2; distomesial spine of article 2 overreaching distal margin of article 4, mesial margin with short spine, distolateral spine overreaching distal margin of article 3. Mxp 3 merus with 2–3 flexor spines, extensor distal margin unarmed. P1 length> 2.0 times PCL, merus 5.5 times as long as wide, with 8 spines on dorsal surface, 2 spines on mesial margin, 3 spines on ventral surface; palm 3.0 times as long as wide, dorsal surface with 6–8 spines, dorsomesial margin spinose; fingers 1.3 times as long as palm, fixed finger with 3 spines on dorsolateral margin, 2 subdistal spines on lateral margin, dactylus with distinct proximal spine, 4 spines on mesial margin including subdistal spine. Description of holotype Carapace. PCL 1.3 times width, dorsal surface gently convex transversely; main transverse ridges mostly uninterrupted; ridges and striae with dense short setae and a few longer iridescent setae. Gastric region with 5 pairs of epigastric spines and 1 median spine. Cervical grooves distinct. Hepatic, parahepatic, anterobranchial and postcervical regions with 1 small spine; lateral part of posterior branchial region with 7 transverse ridges including posterior submarginal ridge. Intestinal region with short stria. Frontal margin slightly oblique. Anterolateral spine reaching sinus between rostrum and supraocular spines, followed by 1 distinctly shorter spine on anterolateral margin. Lateral margins subparallel; branchial margins with 5 spines (3 on anterior branchial margin, third spine minute; 2 on posterior branchial margin, second spine appressed to carapace); third spine smallest (Figures 2 (b), 6(a,b)). Rostrum spiniform, half as long as PCL, directed nearly horizontally in lateral view; dorsal surface sparsely covered with short scales, lateral margins slightly crenulated along distal portion; supraocular spines moderately long, slender, parallel in dorsal view, 0.4 times as long as rostrum (Figure 2 (b), 6(a,b)). Pterygostomian flap visible in dorsal view, with long and short transverse ridges, anterior margin terminating in 1 spinule (Figure 6 (b)). Sternum. Sternal plastron widest at sternite 7. Sternite 3 4.4 times as wide as long, 0.4 times as wide as sternite 4; anterior margin serrated, with 2 sinuous lobes separated by wide V-shaped median notch. Sternite 4 with 2 short median striae, 1 pair of short submedian striae, anterior pair shorter than posterior pair, anterior margin widely contiguous to sternite 3 width (Figure 6 (c)). Sternites 5–6 smooth; sternite 7 with granular patch laterally (Figure 6 (d)). Pleon. Smooth, tergites 2–4 each with deep median transverse groove (Figure 6 (a)); tergite 2 with 8 spines on anterior ridge; tergite 4 with 2 pairs of minute pits in anterior half portion; tergite 5 with 2 pairs of minute submedian pits alternating with 2 uninterrupted transverse ridges, posterior ridge longer; tergite 6 with 1 squamiform ridge interrupted medially and laterally. Telson wider than long (Figure 6 (e)). Eye. Moderately large; cornea dilated, well pigmented; maximum diameter 3.8 times distance between rostrum and supraocular spine, 0.4 times distance between anterolateral spines, 0.3 times PCL. Ocular peduncle without striae on dorsal surface; eyelash short (Figure 6 (a,b)). Antennule. Antennular peduncle article 1 2.4 times as long as wide, distinctly overreaching distal corneal margin; distal spines subequal in length; lateral margin with 2 spines, first lateral spine distinctly overreaching distal spines, second lateral spine very short, located anterior to midlength of article; ventral surface with a few scattered, short squamiform ridges (Figure 6 (f)). Antenna. Antennal peduncle insertion visible in dorsal view, peduncle not reaching distal corneal margin. Article 1 fused with lateral margin of epistome (Figure 6 (f)), distomesial spine overreaching distal margin of article 2. Article 2 with distomesial spine overreaching distal margin of article 4, mesial margin armed with short spine; distolateral spine overreaching distal margin of article 3. Articles 3 and 4 unarmed (Figure 6 (f,g)). Mxp 3. Ischium length 1.7 times as long as merus, disto-flexor and disto-extensor angles terminating in sharp spine; crista dentata with 20–21 denticles. Merus flexor margin with 2 spines, posterior spine distinctly longer, disto-extensor angle unarmed. Carpus to dactylus unarmed (Figure 6 (h)). P1–4. Missing. Variation in paratypes Female paratype with rostrum 0.4 times PCL. Ratio of width to length of thoracic sternite 3 3.8 in the smaller male paratype, 4.8 in the larger male paratype and 4.7 in the female paratype. Antennular peduncle article 1 2.1 times as long as wide in the female paratype. Mxp 3 ischium 1.9 times as long as merus in the smaller male paratype; larger male paratype with Mxp 3 merus bearing 3 spines on flexor margin. Description of P1 of unknown host Length> 2.0 times PCL (judging from available specimens), moderately slender, surfaces of merus to palm covered with distinct rows of squamae, bearing long iridescent setae. Ischium unarmed. Merus 5.5 times as long as wide; dorsal surface with 2 irregular rows of 8 spines increasing in size distally; mesial margin with 2 spines increasing in size distally; ventral surface with 1 row of 3 spines; distal margin with 4 spines (dorsal, mesial, ventromesial and lateral spines), dorsomesial spine strongest, ventromesial spine smallest; lateral margin unarmed. Carpus 2.5 times as long as wide, 0.8 times as long as palm; dorsal surface with 1 row of 4 spines; mesial margin with 3 spines, second spine largest, flanked by dorsomesial row of 3 spines; lateral margin unarmed; ventral surface unarmed, ventromesial margin with row of 3 spinules, ventrolateral distal angle produced in rounded lobe, armed with acuminate spine (Figure 6 (i, k)). Palm 3.0 times as long as wide; dorsal surface with 1 row of 6–8 spines and 1 spine at dactylar articulation; ventral surface with 1 spine at dactylar articulation; dorsomesial surface with row of 6 spines; ventromesial surface with 4 spines, dorsolateral surface with 5 spines. Fingers 1.3 times as long as palm, terminating in sharp claws crossing distally; dorsal surfaces with scattered long setae; fixed finger with 1 row of 3 spines on dorsolateral surface, 2 subdistal spines on lateral margin, occlusal margin denticulate, with slightly larger teeth at regular intervals, 2 excavations along proximal half portion. Dactylus with distinct proximal spine, 4 well-spaced spines along mesial margin including subdistal spine (Figure 6 (j, l)). Distribution Presently known only from Andaman Sea, 315 m depth (Figure 1). Remarks Grimothea krishaha sp. nov. is assigned to Grimothea owing to the fusion of the antennal peduncle article 1 with the lateral margin of the epistome, and an unarmed, inflated pterygostomian flap visible in dorsal view (although the latter character is seen only in a few congeneric species) (Machordom et al. 2022). Among the species recently transferred to Grimothea by Machordom et al. (2022), only G. lipkeholthuisi (Hendrickx and Ayón-Parente, 2010) and M. macrobrachia (Hendrickx, 2003) from the Eastern Pacific Ocean were relatively closely related to G. krishaha sp. nov. The new species shares with G. lipkeholthuisi the presence of a granular patch laterally on the thoracic sternite 7 and transverse row of spines on the anterior ridge of the pleonal tergite 2; and with G. macrobrachia the absence of spines on the posterior margin of carapace. However, the new species differs from G. lipkeholthuisi in the following characters: (1) Epigastric spines 5 pairs (vs 3 pairs of spines in G. lipkeholthuisi); (2) Posterior marginal ridge of carapace unarmed (vs 12 spines in G. lipkeholthuisi); (3) Thoracic sternite 3 almost as wide as, and widely contiguous to, sternite 4 (vs narrowly contiguous in G. lipkeholthuisi); (4) Pleonal tergite 2 with 4 pairs of spines on the anterior ridge (vs 7–8 pairs of spines in G. lipkeholthuisi); (5) Pleonal tergites 3 and 4 with unarmed anterior ridge (vs 10 and 2 spines on tergites 3 and 4, respectively, in G. lipkeholthuisi); (6) First lateral spine of the antennular peduncle article 1 distinctly overreaching distal spines (vs overreaching distomesial spine and not reaching distolateral spine in G. lipkeholthuisi); (7) Antennal peduncle article 2 with 1 spine on mesial margin (vs absent in G. lipkeholthuisi); (8) Distomesial spine of antennal peduncle article 2 overreaching distal margin of article 4 (vs not reaching distal margin of article 3 in G. lipkeholthuisi); (9) Mxp 3 merus with 2 flexor spines, disto-extensor margin unarmed (vs 2 flexor spines, series of small spines including disto-extensor in G. lipkeholthuisi). Moreover, it differs from G. macrobrachia in the following characters: (1) Epigastric spines 5 pairs (vs 2 pairs of spines in G. macrobrachia); (2) Thoracic sternite 3 almost as wide as, and widely contiguous to, sternite 4 (vs thoracic sternite 3 wider than and not contiguous with sternite 4 in G. macrobrachia); (3) Pleonal tergite 2 with 4 pairs of spines on the anterior ridge (vs unarmed in G. macrobrachia); (4) First lateral spine of antennular peduncle article 1 distinctly overreaching distal spines (vs not reaching level of distal spines in G. macrobrachia); (5) Distomesial spine of antennal peduncle article 2 overreaching distal margin of article 4 (vs not reaching distal margin of article 3 in G. macrobrachia); (6) Mxp 3 merus with 2 flexor spines, disto-extensor margin unarmed (vs 2 flexor spines and additional spinules, disto-extensor spine present in G. macrobrachia).

Trapezionida bharuchai sp. nov. (Figures 2 (f), 11, Supplementary Figure S4) Material examined Holotype. Male (4.7 mm PCL, 3.9 mm CW) (IO/SS/ANO/00130), Andaman Sea, off Little Andaman Island, FORVSS stn 38806, 10.72°N, 92.70°E, 53 m depth, chain dredge, coll. Vinay P. Padate, 10 August 2019. Paratypes. 1 female (3.6 mm PCL, 3.1 mm CW) (IO/SS/ANO/00131), same data as holotype; 1 male (5.1 mm PCL, 4.4 mm CW) (IO/SS/ANO/00132), Andaman Sea, off Great Nicobar Island, FORVSS stn 38818, 6.64°N, 93.82°E, 56 m depth, chain dredge, coll. Vinay P. Padate, 16 August 2019. 1 male (parasite attached to pleon) (4.6 mm PCL, 4.0 mm CW) (IO/SS/ANO/00154), south-eastern Bay of Bengal, off Car Nicobar Island, FORVSS stn 292II60, 9.28°N, 92.70°E, 50 m depth, Smith-McIntyre grab, coll. Aiswarya Gopal, 06 December 2011; 2 males (2.4–3.8 mm PCL, 2.2–3.1 mm CW) (IO/SS/ANO/00155), 2 ovigerous females (3.1–3.5 mm PCL, 3.4–3.8 mm CW) (IO/SS/ANO/00156), south-eastern Bay of Bengal, off Great Nicobar Island, FORVSS stn 292II86, 7.13°N, 93.54°E, 50 m depth, Smith-McIntyre grab, coll. Aiswarya Gopal, 11 December 2011. Etymology The species is named in honour of Dr. Erach Bharucha, a pioneer of environmental education in India. Diagnosis Carapace with main transverse ridges mostly uninterrupted; gastric ridges with 5 pairs of epigastric spines and 1 median spine; hepatic region with 1 or 2 spines; parahepatic, anterobranchial, postcervical regions each with 1 small spine; frontal margin strongly oblique; anterolateral spine not reaching sinus between rostrum and supraocular spines; branchial margins with 5 spines; posterior margin unarmed. Rostrum spiniform, half as long as PCL, supraocular spines one-fourth of rostral length. Pterygostomian flap with anterior margin terminating in 1 spinule. Thoracic sternite 4 with 1 pair of long oblique submedian striae and 1 pair of short submedian striae at midlength, anterior margin widely contiguous to sternite 3. Pleonal tergites 2–4 each with deep median groove, tergites 2 and 3 with 1 uninterrupted transverse ridge anterior and posterior to median groove, tergite 4 with 1 interrupted anterior ridge. Eye wider than sinus between rostrum and supraocular spine. Antennular peduncle article 1 bearing subequal distal spines, first lateral spine overreaching distal spines. Distomesial spine of antennal peduncle article 1 reaching distal margin of article 2; distomesial spine of article 2 not reaching distal margin of article 4, mesial margin with short spine, distolateral spine not reaching distal margin of article 3. Mxp 3 merus with 3 flexor spines, disto-extensor spine present. P1 length 3.5 times PCL, merus 5.2 times as long as wide, with 2 rows of 4–9 spines on dorsal surface, 2 rows of 3–4 spines on mesial face; palm 3.4 times as long as wide, dorsal surface with 6 spines, dorsomesial margin spinose; fingers 0.7 times as long as palm, fixed finger with 5 spines on dorsolateral surface, 2 subdistal spines on lateral margin, dactylus with short proximal spine, 2 spines on mesial margin and 2 subdistal spines. P2–4 smooth with iridescent setae on extensor margin; dactyli 0.6–0.7 times as long as propodi, flexor margins bearing 7 movable spines, distal tips corneous, with slender subterminal spine closely appressed to unguis. Description of holotype Carapace. PCL 1.2 times width, dorsal surface slightly convex transversely; main transverse ridges mostly uninterrupted; ridges and striae with dense short setae and a few longer setae. Gastric region with transverse row of 5 pairs of epigastric spines and 1 median spine. Cervical grooves distinct. Hepatic region with 1 or 2 spines; parahepatic, anterobranchial and postcervical regions each with 1 small spine; lateral part of posterior branchial region with 9 transverse ridges including posterior submarginal ridge. Intestinal region without distinct transverse stria. Frontal margins strongly oblique. Lateral margins moderately convex in dorsal view. Anterolateral spine not reaching sinus between rostrum and supraocular spines, followed by 1 or 2 distinctly shorter spines on anterolateral margin. Branchial margins with 5 spines (Figures 2 (f), 11(a,b)). Rostrum spiniform, half as long as PCL, directed slightly upwards in lateral view; lateral margins slightly crenulated distally; supraocular spines short, slender, parallel in dorsal view, one-fourth length of rostrum (Figures 2 (f), 11(a,b)). Pterygostomian flap with long and short transverse ridges, anterior margin terminating in 1 spinule (Figure 11 (b)). Sternum. Thoracic sternite 3 3.1 times as wide as long, half width of sternite 4; anterior margin undulate, granulate, with wide V-shaped median notch. Sternite 4 with 1 pair of oblique submedian striae anteriorly and 1 pair of transverse striae at midlength, anterior margin contiguous and equal to sternite 3 width (Figure 11 (c)). Sternites 5–7 smooth, with row of short setae on anterior ridge. Pleon. Smooth, tergites 2–4 with deep median transverse groove, tergites 2 and 3 each with 1 uninterrupted transverse ridge anterior and posterior to median groove, tergite 4 with interrupted anterior ridge only. Tergite 5 with uninterrupted anterior and posterior transverse ridges. Tergite 6 with 2 squamiform ridges, posterior ridge interrupted laterally (Figure 11 (d)). Telson wider than long, with short squamiform ridges (Figure 11 (e)). Eye. Moderately large; cornea dilated, maximum diameter 3.8 times distance between rostrum and supraocular spine, about 0.3 times distance between anterolateral spines, 0.2 times PCL. Ocular peduncle with 1 stria on dorsal surface; eyelash long (Figure 11 (a)). Antennule. Antennular peduncle article 1 2.1 times as long as wide, overreaching distal corneal margin; distal spines subequal in length; lateral margin with 2 spines, first lateral spine distinctly overreaching distal spines, second lateral spine short, located anterior to midlength of article; ventral surface with a few scattered, short squamiform ridges (Figure 11 (f)). Antenna. Antennal peduncle not reaching distal margin of cornea. Article 1 with distomesial spine reaching distal margin of article 2. Article 2 with distomesial spine not reaching distal margin of article 4, mesial margin armed with short spine; distolateral spine not reaching distal margin of article 3. Articles 3 and 4 unarmed (Figure 11 (f)). Mxp 3. Ischium 1.6 times as long as merus, disto-flexor angle terminating in spine. Merus flexor margin with 3 spines, extensor margin with distal spine. Carpus, propodus and dactylus unarmed (Figure 11 (g)). P1. Length 3.5 times PCL, surfaces with numerous squamiform ridges of various sizes bearing short setae. Ischium with small spine on distolateral margin. Merus 5.2 times as long as wide, dorsal surface with 9 spines in lateral row, 4 spines in mesial row; mesial face with 4 spines in upper row, 3 spines in lower row; distal margin with 4 spines (dorsomesial, dorsolateral, ventrolateral, ventromesial spines; dorsomesial spine strongest, ventromesial spine smallest) (Figure 11 (h)). Carpus 2.3 times as long as wide, 0.6 times as long as palm; dorsolateral margin with 4–6 spines; dorsal surface with 0–3 spinules; ventrolateral distal angle produced in rounded lobe, with 1 spine (Figure 11 (h,i)). Palm 3.4 times as long as wide; dorsal surface with median row of 6 spines and 1 spine at dactylar articulation; dorsomesial margin with 7 spines; dorsolateral margin with 6 spines. Fingers 0.7 times as long as palm, terminating in sharp claws crossing distally; dorsal surfaces with scattered short setae. Fixed finger with 1 row of 5 spines on dorsolateral surface, 2 subdistal spines on lateral margin, occlusal margin denticulate, with 1 rounded tooth on proximal one-third portion (Figure 11 (j)). Dactylus with short proximal spine, 2 subdistal spines on mesial margin, and 2 spines on dorsomesial surface (Figure 11 (j)). P2–4. P2 missing; P3–4 surfaces smooth with iridescent setae on extensor margin. P3 and P4 lengths 1.9 and 1.7 times PCL, respectively; meri with lengths 0.6 and 0.5 times PCL, respectively, 5.1 and 4.7 times as long as high, extensor margins with 8 spines, distal spine longest, flexor margin with 1 strong distal spine followed by 2 small spines and transverse ridges; P3 carpus extensor margin with 1 distal spine and 2 spinules, flexor margin with 1 distal spine, P4 carpus with only distal spines; propodi 6.7 and 6.4 times as long as wide, respectively, extensor margins unarmed, flexor margins with 14 and 10 movable spines, respectively; dactyli 0.6 and 0.7 times as long as propodi, respectively, flexor margins with 7 movable spines along entire margin, distal tips corneous, with slender subterminal spine closely appressed to unguis. Variation in paratypes PCL 1.1 times width. P2–4 with lengths 2.4, 2.1 and 1.8 times PCL, respectively; meri extensor margins with 6, 8 and 5 spines, respectively; P2–3 carpi extensor margins with 1 large distal, 3 small spines, P4 carpus with large distal spine; propodi flexor margins with 9, 10 and 9 spines, respectively; dactyli flexor margins with 7 movable corneous spines (Figure 11 (k–m, q)). Distribution Presently known only from Andaman Sea, 53–56 m depth (Figure 1). Remarks Trapezionida bharuchai sp. nov. shares the oblique frontal margins of carapace, large eyes, subequal distal spines of antennular peduncle article 1, unarmed antennal peduncle article 3, lobes of thoracic sternite 3 separated anteriorly by wide V-shaped notch, abruptly inclined anterolateral margins of sternite 4, and unarmed pleonal somites with T. clinata Macpherson, 1994 from Western Pacific Ocean, T. munin Komai, 2011 from Japan and T. roshanei Tirmizi, 1966 from Gulf of Oman. The new species closely resembles T. munin in the armature of the third maxilliped and the presence of a slender subterminal spine closely appressed to the unguis of P2–4 dactyli (Komai 2011). The new species can be distinguished from the latter in the following characters: (1) Carapace lateral margins moderately convex in dorsal view (vs feebly convex in T. munin); (2) Pterygostomian flap with anterior margin terminating in 1 spinule (vs unarmed in T. munin); (3) Pleonal tergite 4 with interrupted anterior ridge only (vs anterior ridge and 3–4 striae in T. munin); (4) Antennal peduncle article 2 bearing spine on mesial margin (vs unarmed mesial margin in T. munin); (5) P1 palm 3.4 times as long as wide, dorsolateral margin with 6 spines (vs palm 2.8 times as long as wide; dorsolateral margin with 2–4 spines in T. munin); (6) P1 fixed finger with 1 rounded tooth on proximal one-third portion of occlusal margin (vs rounded tooth absent proximally on occlusal margin in T. munin); (7) P4 merus with 5 spines on extensor margin (vs P4 merus with disto-extensor spine only in T. munin). The new species closely resembles T. roshanei in the antennal peduncle article 2 with distomesial spine overreaching distal margin of article 3, and distolateral spine not reaching distal margin of article 3 (Tirmizi 1966). The new species can be distinguished from closely related species in the following characters: (1) Carapace lateral margins moderately convex in dorsal view (vs feebly convex in T. roshanei); (2) Antennal peduncle article 2 with spine on mesial margin (vs mesial spine absent in T. clinata and T. roshanei); (3) Distomesial spine of antennal peduncle article 2 overreaching distal margin of article 3, and distolateral spine not reaching distal margin of article 3 (vs distomesial spine overreaching distal margin of article 4, distolateral spine overreaching distal margin of article 3 in T. clinata); (4) P2–4 dactyli with slender subterminal spine closely appressed to unguis (vs absent in T. clinata and T. roshanei)., Published as part of Tiwari, Shivam, Padate, Vinay P. & Cubelio, Sherine Sonia, 2023, Chirostyloid and galatheoid squat lobsters (Decapoda: Anomura) from Andaman and Nicobar Islands, India, with three new species, pp. 520-556 in Journal of Natural History 57 (9 - 12) on pages 546-550, DOI: 10.1080/00222933.2023.2192429, http://zenodo.org/record/7975359, {"references":["Macpherson E. 1994. Crustacea Decapoda: studies on the genus Munida Leach, 1820 (Galatheidae) in New Caledonian and adjacent waters with descriptions of 56 new species. In: A Crosnier, editor. Resultates des Campegnes MUSORSTOM, 12. Mem Mus Natl Hist Nat. Vol. 161; p. 421 - 569.","Komai T. 2011. Squat lobsters of the genus Munida (Crustacea: Decapoda: Anomura: Munididae) from the Ogasawara Islands, with descriptions of four new species. Mem Natl Mus Nat Sci Tokyo. 47: 339 - 365.","Tirmizi NM. 1966. Crustacea: Galatheidae. John Murray Exped Sci Rep. 11 (2): 167 - 234."]}

Leptonida vigiliarum (Alcock, 1901) (Figures 2 (d), 8, 9, Supplementary Figure S2) Munida vigiliarum Alcock, 1901: 243 (type locality: Bay of Bengal, off west coast of Andamans near Sentinel Islands, 173–290 fathoms (= 317–531 m) depth); Baba 2005: 255 (key to species), 276 (synonymies); Baba et al. 2008: 127 (compilation) Not Munida vigiliarum: Doflein and Balss 1913: 147, pl. 13, fig. 2 (SW of Great Nicobar, 362 m (see ′Remarks̍); Tirmizi 1966: 201, fig. 20 [= Gonionida shaula (Macpherson and de Saint Laurent, 2002)], Published as part of Tiwari, Shivam, Padate, Vinay P. & Cubelio, Sherine Sonia, 2023, Chirostyloid and galatheoid squat lobsters (Decapoda: Anomura) from Andaman and Nicobar Islands, India, with three new species, pp. 520-556 in Journal of Natural History 57 (9 - 12) on page 537, DOI: 10.1080/00222933.2023.2192429, http://zenodo.org/record/7975359, {"references":["Alcock A. 1901. A descriptive catalogue of the Indian deep-sea Crustacea Decapoda Macrura and Anomala, in the Indian Museum. Being a revised account of the deep-sea species collected by the Royal Indian Marine Survey Ship Investigator. Calcutta: Trustees of the Indian Museum. doi: 10. 5962 / bhl. title. 30840.","Baba K. 2005. Deep-sea chirostylid and galatheid crustaceans (Decapoda: Anomura) from the IndoWest Pacific, with a list of species. Galathea Rep. 20: 1 - 317.","Baba K, Macpherson E, Poore GCB, Ahyong ST, Bermudez A, Cabezas P, Lin CW, Nizinski M, Rodrigues C, Schnabel KE. 2008. Catalogue of squat lobsters of the world (Crustacea: Decapoda: Anomura - families Chirostylidae, Galatheidae and Kiwaidae). Zootaxa. 1905 (1): 1 - 220. doi: 10.11646 / zootaxa. 1905.1.1.","Doflein F, Balss H. 1913. Die Galatheiden der deutschen Tiefsee-Expedition., and Chun C, editor. Wissenschaftliche Ergebnisse der deutschen Tiefsee-Expedition auf dem Dampfer ̎ Valdivia \" 1898 - 1899. Vol. 20. Jena: Verlag von Gustav Fischer. p. 125 - 184. doi: 10.5962 / bhl. title. 2171.","Tirmizi NM. 1966. Crustacea: Galatheidae. John Murray Exped Sci Rep. 11 (2): 167 - 234."]}

Torbenella lupi sp. nov. urn:lsid:zoobank.org:act: FE41E3F0-3236-4B3D-AB95-CC190C43A233 Fig. 4 Torbenella aff. orbis 1. — Machordom et al. 2022: table 2. Etymology The name ‘ lupi ’ refers to one of the southern hemisphere constellations (the Wolf). Material examined Holotype PAPUA-NEW GUINEA • ov. ♀ (10.2 mm); KAVIENG stn CP4418; 02º27′ S, 150º40′ E; 335–340 m depth; 28 Aug. 2014; GenBank no.: COI: OP215693, 18S: OP196289, PEPCK: OP252566; MNHNIU-2014-10024. Paratypes PAPUA-NEW GUINEA • 3 ♂♂ (6.5–8.0 mm), 3 ov. ♀ (7.5–8.0 mm), 1 ♀ (5.9 mm); KAVIENG stn DW4495; 02º24′ S, 149º55′ E; 272–274 m depth; 6 Sep. 2014; MNHN-IU-2014-9900 • 1♀ (7.2 mm); KAVIENG stn CP4496; 02º25′ S, 149º54′ E; 269–274 m depth; 6 Sep. 2014; MNHN-IU-2014-13983. Description CARAPACE. Slightly wider than long. Transverse ridges usually interrupted, except several on gastric region and posterior part of carapace, with dense very short setae. Main transverse striae on posterior part of carapace interrupted in cardiac region. Scales and secondary striae absent between main striae. Gastric region with 2 main epigastric spines each behind supraocular spine; with row of 4–5 minute flanking spines and some small spines at base of rostrum and in parahepatic, hepatic and anterior branchial regions; one small postcervical spine on each side. Orbit with lateral limit weakly defined. Frontal margins concave. Lateral margins slightly convex. Anterolateral spine well developed, at anterolateral angle, reaching level of sinus between rostrum and supraocular spines. One or 2 very small marginal spines anterior to cervical groove. Branchial margins with 4 (rarely 5) small spines. Rostrum spiniform, less than half as long as remaining carapace, not exceeding end of corneae, carinated dorsally, straight, and directed slightly upwards. Supraocular spines barely reaching midlength of rostral spine and falling short of end of corneae, subparallel, directed slightly upwards. THORACIC STERNUM. Smooth, without striae, except a few on sternite 4. Sternite 3 2.5 times as wide as long; sternite 4 2.8 times as wide as long, and 2.3 times as wide as sternite 3. Anterior part of sternite 4 slightly narrower than sternite 3; anterior margin widely contiguous to sternite 3. ABDOMEN. Somites 2–4 with 2 median spines on anterior ridge; posterior ridge of somite 4 with small median spine. Somites 2–3 each with 3 transverse ridges and several scales in addition to anterior ridge. Somite 4 with a few striae. EYES. Eyes large, maximum corneal diameter 0.4 times distance between bases of anterolateral spines. ANTENNULE. Article 1 (distal spines excluded) about one-third carapace length, elongate, barely reaching end of corneae, with 2 short distal spines, mesial spine shorter than lateral spine; lateral margin unarmed, bearing numerous long plumose setae. ANTENNA. Article 1 with prolonged, strong mesial process exceeding antennular peduncle, lateral border with numerous long plumose setae; article 2 with 2 distal spines, distomesial longer than distolateral, barely reaching end of article 3; article 3 with distomesial spine, article 4 unarmed. MXP3. Ischium about 1.5 times length of merus, distoventrally produced to spine. Merus with welldeveloped median spine on flexor margin, extensor margin unarmed. P1. 2.5–3 times carapace length, squamous, with dense short setae on scales, with scattered long setae. Merus 1.3–1.5 times carpus length, armed with some mesial spines, distalmost strongest. Carpus slightly longer than palm, 3 times as long as wide, with several spines along mesial margin. Palm slightly longer than fingers, with few small spines on mesial border. Fingers unarmed, distally curving and crossing, ending in sharp point. P2–4. Moderately long and slender, squamous, with dense short setae on scales, with some long iridescent setae along extensor margins of all articles. P2 twice carapace length. Meri successively shorter posteriorly (P3 merus 0.8 times length of P2 merus, P4 merus 0.8 times length of P3 merus); P2 merus 0.8 times carapace length, 4.5–5.0 times as long as wide, 1.7 times as long as P2 propodus; P3 merus 4.0–4.5 times as long as wide, 1.5 times as long as P3 propodus; P4 merus 3.5–4.0 times as long as wide, 1.3 times as long as P4 propodus. Extensor margins of meri with row of small, proximally diminishing spines on P2–3, distal spine only on P4; flexor margins with distal spines followed proximally by several eminences; lateral sides unarmed. Carpi with several spines on extensor margin; flexor margin ending in blunt point. Propodi 4.0–4.5 times as long as wide; extensor margin unarmed; flexor margin with 4–5 slender movable spines, without fixed distal spine. Dactyli slender, length 0.9 times that of propodi; flexor margin with 2 median movable spinules; P2 dactylus 5.5 times as long as wide. Genetic data Partial genes of COI, 18S and PEPCK were successfully sequenced. As usual, the COI sequence showed the highest levels of divergence, 4.86% comparing T. aequabilis sp. nov. and T. orbis, and 15.42% to T. calvata. Torbenella lupi sp. nov. formed a well-supported cluster (pp = 1) with T. aequabilis and T. orbis (Fig. 7). Remarks The new species is morphologically closely related to T. orbis (Baba, 2005) and T. mensae sp. nov., sharing the presence of median spines on the anterior ridge of the abdominal somite 2. Characters distinguishing the three species are outlined under the Remarks of T. mensae (see below). Distribution Papua-New Guinea, between depths of 269 and 340 m.

Key to species of the genus Heteronida 1. Body densely granulated, with numerous large granules......................................... H. ceres sp. nov. – Body not densely granulated, with minute or small granules........................................................... 2 2. Rostrum without ridge in midline.................................. H. barunae Baba & de Saint Laurent, 1996 – Rostrum with longitudinal ridge in midline...................................................................................... 3 3. Branchial region of carapace with distinct elevation. Gastric process prominently high and anteriorly produced...................................................................................... H. aspinirostris (Khodkina, 1981) – Branchial region of carapace without elevation. Gastric process low and rounded......................................................................................................................... H. clivicola Macpherson & Baba, 2006

Heteronida aspinirostris (Khodkina, 1981) Bathymunida aspinirostris Khodkina, 1981: 1261, figs 1–5. Heteronida aspinirostris – Baba & de Saint Laurent 1996: 475, figs 3d–e, 23, 32d–f. — Baba 2005: 246. — Macpherson & Baba 2006: 451. — Baba et al. 2008: 81. Diagnosis Dorsal surface of carapace finely granulate; gastric process prominently high and anteriorly produced; branchial region with distinct elevation. Rostral and supraocular spines distinct, with longitudinal ridge in midline of rostrum reaching posteriorly to gastric process, anteriorly directed strongly upward. Abdominal somites 2–3 each with strong, median hump-like process and low lateral process on each side; somite 4 with smaller median process on each of anterior and posterior ridges. P1–4 granulate. Dactyli of P2–4 relatively stout, flexor margin with 6–10 spines, distal one rather close to tip, extensor margin with plumose setae. Material examined NEW CALEDONIA • 1 ♂ (3.2 mm); Chesterfield Islands, EBISCO stn DW2610; 19º33.147′ S, 158º40.618′ E; 486–494 m depth; 19 Oct. 2005; MNHN-IU-2013-19874. NEW CALEDONIA • 2 ♂♂ (3.0– 3.2 mm); EXBODI stn CP3830; 22°05′ S, 167°09′ E; 400–437 m depth; 8 Sep. 2011; MNHN-IU-2016-5792 • 1 ♂ (3.4 mm); EBISCO stn DW3906; 19°50′ S, 165°33′ E; 490–580 m depth; 23 Sep. 2011; MNHN-IU-2011-7018 • 1 ♀ (3.3 mm); EBISCO stn DW3925; 18°35′ S, 164°19′ E; 388 m depth; 26 Sep. 2011; MNHN-IU-2016-5790 • 2 ♂♂ (3.2–3.3 mm); EBISCO stn DW3926; 18°35′ S, 164°20′ E; 364–473 m depth; 26 Sep. 2011; GenBank no.: COI: OP215645, 16S: OP195984, 18S: OP196233, PEPCK: OP252457; MNHN-IU-2013-1920 • 1 ♂ (3.3 mm), 2 ♀♀ (3.1– 3.2 mm); EXBODI stn CP3927; 18°36′ S, 164°20′ E; 381 m depth; 26 Sep. 2011; MNHN-IU-2013-1972 • 1 ♂ (3.2 mm), 1 ov. ♀ (3.7 mm), 1 ♀ (3.3. mm); EBISCO stn DW3930; 18°37′ S, 164°26′ E; 448– 464 m depth; 26 Sep. 2011; MNHN-IU-2013-1663, MNHN-IU-2013-1662, MNHN-IU-2013-1660 • 4 ♂♂ (2.8–3.3 mm), 3 ov. ♀♀ (3.2–3.7 mm); EBISCO stn DW3937; 18°37′ S, 164°26′ E, 446–604 m depth; 27 Sep. 2011; MNHN-IU-2013-1788 to IU-2013-1790. Distribution Previously known from New Caledonia, Loyalty Islands, Pines Island, Norfolk Ridge, Chesterfield Islands, Vanuatu, and Tonga, between depths of 345 and 930 m. The present material was collected in New Caledonia and Chesterfield Islands, at depths of 364– 604 m., Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on pages 118-119, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/7689432, {"references":["Khodkina I. V. 1981. A contribution to the fauna of the family Galatheidae (Decapoda) of the South-west Pacific. Zoologicheskii Zhurnal 8: 1261 - 1264. [In Russian with English summary and translation.]","Baba K. & de Saint Laurent M. 1996. Crustacea Decapoda: Revision of the genus Bathymunida Balss, 1914, and description of six new related genera (Galatheidae). In: Crosnier A. (ed.) Resultats des Campagnes MUSORSTOM 15. Memoires du Museum national d'histoire naturelle 168: 433 - 502.","Baba K. 2005. Deep-sea chirostylid and galatheid crustaceans (Decapoda: Anomura) from the Indo- West Pacific, with a list of species. Galathea Reports 20: 1 - 317.","Macpherson E. & Baba K. 2006. New species and records of small galatheids (Crustacea, Decapoda, Galatheidae) from the southwest and central Pacific Ocean. Zoosystema 28: 443 - 456.","Baba K., Macpherson E., Poore G. C. B., Ahyong S. T., Bermudez A., Cabezas P., Lin C. W., Nizinski M., Rodrigues C. & Schnabel K. E. 2008. Catalogue of squat lobsters of the world (Crustacea: Decapoda: Anomura - families Chirostylidae, Galatheidae and Kiwaidae). Zootaxa 1905: 1 - 220. https: // doi. org / 10.11646 / zootaxa. 1905.1.1"]}

Key to species of Torbenella 1. Second abdominal somite unarmed.................................................................................................. 2 – Second abdominal somite with 2 median spines on anterior ridge.................................................. 4 2. Thoracic sternite 3 wide, more than 3 times as wide as long. Posterior ridge of abdominal somite 4 unarmed. Anterolateral spine of carapace short, not reaching sinus between rostral and supracocular spines.................................................................................................. T. calvata (Macpherson, 2006) – Thoracic sternite 3 narrow, less than 3 times as wide as long. Posterior ridge of abdominal somite 4 usually with small median spine. Anterolateral spine of carapace well developed, barely reaching sinus between rostral and supracocular spines................................................................................. 3 3. Some transverse ridges of carapace uninterrupted. Abdominal somites 2–3 each with 3 transverse ridges in addition to anterior ridge.................................................................... T. aequabilis sp. nov. – All transverse ridges of carapace laterally or medially interrupted. Abdominal somites 2–3 each with 1 or 2 transverse ridges in addition to anterior ridge............................................. T. crateris sp. nov. 4. Antennal article 2 with distomesial spine strong, overreaching midlength of article 4. P2–4 dactyli armed with row of spinules on proximal two-thirds of flexor margin................................................ ............................................................................................................ T. insolita (Macpherson, 2004) – Antennal article 2 with distomesial spine of moderate size, reaching midlength of article 3. P2–4 dactyli unarmed or with a few spinules on proximal half of flexor margin...................................... 5 5. Thoracic sternite 3 wide, more than 3 times as wide as long. Posterior ridge of abdominal somite 4 unarmed................................................................................................................. T. mensae sp. nov. – Thoracic sternite 3 moderately wide, less than 3 times as wide as long. Posterior ridge of abdominal somite 4 usually with small median spine....................................................................................... 6 6. P2–4 dactyli slender, 7.5 times as long as wide; flexor margin unarmed ......... T. orbis (Baba, 2005) – P2–4 dactyli moderately slender, 5.5 times as long as wide; flexor margin with a few spinules on proximal half................................................................................................................ T. lupi sp. nov., Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on page 136, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/7689432, {"references":["Macpherson E. 2004. Species of the genus Munida Leach, 1820 and related genera from Fiji and Tonga (Crustacea: Decapoda: Galatheidae). In: Marshall B. A. & Richer de Forges B. (eds) Tropical Deep-Sea Benthos 23. Memoires du Museum national d'histoire naturelle 191: 231 - 292.","Baba K. 2005. Deep-sea chirostylid and galatheid crustaceans (Decapoda: Anomura) from the Indo- West Pacific, with a list of species. Galathea Reports 20: 1 - 317."]}

Torbenella crateris sp. nov. urn:lsid:zoobank.org:act: 6CBF6B31-504B-4688-8EAB-E1D94F433791 Fig. 3 Torbenella aff. calvata 1. — Machordom et al. 2022: table 2. Etymology The name ‘ crateris ’ refers to one of the southern hemisphere constellations (the Cup). Material examined Holotype NEW CALEDONIA • ov. ♀ (7.2 mm); EXBODI stn CP3927; 18°36′ S, 164°20′ E; 381 m depth; 26 Sep. 2011; MNHN- IU-2013-1858. Paratypes NEW CALEDONIA • 1 ov. ♀ (5.4 mm); EXBODI stn CP3849; 22°03′ S, 168°41′ E; 360–560 m depth; 13 Sep. 2011; MNHN-IU-2011-7609 • 2 ov. ♀♀ (6.7–8.4 mm), 1 ♀ (6.0 mm); EXBODI stn CP3927; 18°36′ S, 164°20′ E; 381 m depth; 26 Sep. 2011; MNHN-IU-2011-7921 • 1 ov. ♀ (8.8 mm); EBISCO stn DW3932; 18°32′ S, 164°21′ E; 500–1100 m depth; 27 Sep. 2011; GenBank no.: COI: OP215686, 16S: OP196025, 18S: OP196286; MNHN-IU-2011-8600 • 2 ov. ♀♀ (7.2–7.3 mm); SPANBIOS stn DW5247; 18°36.1′ S, 164°24.4′ E; 352–376 m depth; 23 Jul. 2021; MNHN-IU-2021-2960 • 1 ov. ♀ (5.3 mm); SPANBIOS stn DW5264; 20°28.6′ S, 164°49.9′ E; 332–335 m depth; 26 Jul. 2021; MNHN-IU-2020-907 • 1 ♂ (8.6 mm), 1 ♀ (3.5 mm); Chesterfield Islands, KANADEEP stn DW5026; 20º22′ S, 158º40′ E; 360–410 m depth; 21 Sep. 2017; MNHN-IU-2017-8927, MNHN-IU-2017-2821 • 1 ♀ (3.3 mm); KANADEEP stn DW5037; 19º54′ S, 158º35’′E; 340 m depth; 22 Sep. 2017; MNHNIU-2017-2824. Description CARAPACE. As long as wide. Transverse ridges laterally or medially interrupted, with dense very short setae. Few scales and secondary striae between main striae. Gastric region with 2 main epigastric spines, each behind supraocular spine; 4–6 flanking minute spines and 2–3 small spines between median spines; several small spines at base of rostrum and in parahepatic, hepatic and anterior branchial regions; one small postcervical spine on each side. Orbit with lateral limit slightly defined. Frontal margins concave. Lateral margins slightly convex.Anterolateral spine well developed, at anterolateral angle,nearly reaching level of sinus between rostral and supraocular spines. One very small marginal spine directly anterior to cervical groove. Branchial margins with 4–5 small spines. Rostrum spiniform, 0.4 carapace length, not exceeding end of corneae, carinated dorsally, straight, and slightly upwards directed. Supraocular spines barely reaching midlength of rostral spine and falling short of end of corneae, subparallel, directed slightly upwards. THORACIC STERNUM. Smooth, without striae, except a few on sternite 4. Anterior part of sternite 4 slightly narrower than sternite 3, anterior margin widely contiguous to sternite 3. Sternite 3 2.5 times as wide as long; sternite 4 2.5–2.7 times as wide as long, and 2.4–2.5 times as wide as sternite 3. ABDOMEN. Somite 2 unarmed; somites 3–4 with 2 median spines on anterior ridge; posterior ridge of somite 4 with median spine small, rarely obsolescent. Somites 2–3 each with 1–2 transverse ridges in addition to anterior ridge. Somite 4 with a few striae. EYES. Eyes large, maximum corneal diameter half distance between bases of anterolateral spines. ANTENNULE. Article 1 (distal spines excluded) about one-third carapace length, elongate, slightly exceeding corneae, with 2 short distal spines, mesial spine shorter than lateral spine; lateral margin unarmed, bearing numerous long plumose setae. ANTENNA. Article 1 with prolonged and strong mesial process, slightly exceeding antennular peduncle, lateral border with numerous long plumose setae; article 2 with 2 distal spines, distomesial spine longer than distolateral, not reaching end of article 3; article 3 with small distomesial spine, article 4 unarmed. MXP3. Ischium about 1.5 times length of merus, distoventrally bearing spine. Merus with well developed median spine on flexor margin, extensor margin unarmed. P1. Squamous, with dense short setae on scales, with scattered long setae, length 3.5–4.0 times that of carapace. Merus 1.2 times carapace length, slightly longer than carpus, armed with some mesial spines, distalmost strongest. Carpus slightly longer than palm, and 4 times as long as wide, with several spines along mesial margin. Palm 1.2 times as long as fingers, unarmed. Fingers unarmed, distally curving and crossing, ending in a sharp point. P2–4. Moderately long and slender, squamous, with dense short setae on scales, with some long iridescent setae along extensor margins of all articles. P2 2.0–2.5 times carapace length. Meri successively shorter posteriorly (P3 merus times 0.8 length of P2 merus, P4 merus 0.8 times length of P3 merus); P2 merus as long as carapace, 6.0 times as long as wide, 1.7–1.8 times as long as P2 propodus; P3 merus 4.5–5.0 times as long as wide, 1.5 times as long as P3 propodus; P4 merus 4.0 times as long as wide, 1.3 times as long as P4 propodus. Extensor margins of meri with row of small proximally diminishing spines on P2–3, distal spine only on P4; flexor margins with distal spines followed proximally by several eminences; lateral sides unarmed. Carpi with distal spine on extensor margin; flexor margin ending in blunt point. Propodi 4.5–5.0 times as long as wide; extensor margin unarmed; flexor margin with 5–6 slender movable spines, without fixed distal spine. Dactyli slender, length 0.8–0.9 times that of propodi; flexor margin with 2 movable spinules on median part; dactylus 7.0 times as long as wide. Genetic data sequence data could be generated for COI, the partial ribosomal 16S and 18S genes. Torbenalla crateris sp. nov. is resolved as the sister species of the clade formed by T. aequabilis sp. nov., T. lupi sp. nov., T. orbis, and T. insolita (Fig. 7). High values of COI divergence were found between this new species and the rest of representative of the genus: from 10.46 % respect to T. lupi sp. nov. to 13.27% with respect to T. calvata and T. insolita. The divergence respect to T. aequabilis was slightly smaller (12.29%). Remarks The new species is morphologically closely related to T. calvata (Macpherson, 2006) and T. aequabilis sp. nov., having the abdominal somite 2 unarmed. The three species differs from each other in the following aspects: The anterolateral spine of the carapace falls far short of the sinus between rostral and supraocular spines in T. calvata, whereas these spines are longer and barely reaching the level of this sinus in T. aequabilis and T. crateris. The posterior ridge of the abdominal somite 4 has a median spine, usually small, rarely obsolescent in T. aequabilis and T. crateris, always absent in T. calvata. The thoracic sternite 3 is clearly wider in T. calvata than in T. crateris and T. aequabilis (3.5 times vs 2.5 times as wide as long). The anterior margin of sternite 4 is wider than sternite 3 in T. calvata, whereas it is slightly narrower in T. crateris. Furthermore, the sternite 4 is 2.4–2.5 times as wide as sternite 3 in T. aequabilis and T. crateris, whereas it is only twice as wide in T. calvata. The distolateral spine of the antennal article 2 is very strong, exceeding article 3 in T. calvata, whereas this spine is much smaller and never reaching the end of article 3 in T. aequabilis and T. crateris. The differences between T. crateris and T. aequabilis are as follows: The transverse ridges of the carapace are not usually interrupted except several on gastric region and posterior part of carapace in T. aequabilis, whereas all ridges are medially or laterally interrupted in T. crateris. The abdominal somites 2–3 each bear 3 transverse ridges and several scales in addition to the anterior ridge in T. aequabilis, whereas there are only one or two additional ridges in T. crateris. The P2–4 dactyli are more elongate in T. crateris (7 times as long as wide) than in T. aequabilis (6 times as long as wide). Distribution New Caledonia and Chesterfield Islands, between depths of 340 and 1100 m., Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on pages 125-127, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/7689432, {"references":["Machordom A., Ahyong S. T., Andreakis N., Baba K., Buckley D., Garcia-Gimenez R., McCallum A., Rodriguez-Flores P. C. & Macpherson E. 2022. Deconstructing the squat lobster genus Munida to reconstruct the evolutionary history and taxonomy of the family Munididae (Crustacea, Anomura, Galatheoidea). Invertebrate Systematics 36: 926 - 970. https: // doi. org / 10.1071 / IS 22013"]}

Specimens of munidid squat lobsters belonging to the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 were collected in scientific expeditions made by several French cruises along the southwestern Pacific. These specimens were identified as two species (one new) of Heteronida and six species (four new) of Torbenella. The present paper provides systematic accounts of the five new species, along with new locality records of known species shown by this material and color information where available. Molecular data is provided to support the systematic status of each new species. A key to species for each of the genera is also presented.

Torbenella aequabilis sp. nov. urn:lsid:zoobank.org:act: C00CBABF-A072-4153-BF27-A2FEFCDF002C Fig. 2 Torbenella aff. calvata 2 – Machordom et al. 2022: table 2. Etymology From the Latin ‘ aequabilis ’, ‘equal’, in reference to the similar morphology to Torbenella crateris sp. nov. Material examined Holotype NEW CALEDONIA • ♀ (6.6 mm); KANACONO stn DW4785; 22°48′ S, 167°41′ E; 388–403 m depth; 29 Aug. 2016; GenBank no.: COI: OP215687, 16S: OP196026, PEPCK: OP252561; MNHNIU-2017-8750. Paratype NEW CALEDONIA • ♀ (6.8 mm); same collection data as for holotype; MNHN-IU-2014-13980. Description CARAPACE. As long as wide. Transverse ridges usually interrupted, except several on gastric region and posterior part of carapace, with dense very short setae. Scales and secondary striae absent between main striae. Gastric region with 2 main epigastric spines, each behind supraocular spine; 4–6 additional minute spines on each side and 2–3 between median spines; several small spines at base of rostrum and in parahepatic, hepatic and anterior branchial regions; one small postcervical spine on each side. Orbit with lateral limit slightly defined. Frontal margins concave. Lateral margins slightly convex. Anterolateral spine well developed, at anterolateral angle, barely reaching level of sinus between rostrum and supraocular spines. One or 2 very small marginal spines anterior to cervical groove. Branchial margins with 4 small spines. Rostrum spiniform, 0.4 times carapace length, not exceeding end of corneae, carinated dorsally, straight, and directed slightly upwards. Supraocular spines not reaching midlength of rostral spine and falling far short of end of corneae, subparallel, directed slightly upwards. THORACIC STERNUM. Smooth, without striae, except a few on sternite 4. Anterior part of sternite 4 slightly narrower than sternite 3; anterior margin widely contiguous to sternite 3. Sternite 3 2.5 times as wide as long; sternite 4 3 times as wide as long, and 2.3 times as wide as sternite 3. ABDOMEN. Somite 2 unarmed; somites 3–4 with 2 median spines on anterior ridge; posterior ridge of somite 4 with median small spine. Somites 2–3 each with 3 transverse ridges and several scales in addition to anterior ridge. Somite 4 with a few striae. EYES. Eyes large, maximum corneal diameter half distance between bases of anterolateral spines. ANTENNULE. Article 1 (distal spines excluded) about one-third carapace length, elongate, slightly exceeding end of corneae, with 2 short distal spines, mesial spine shorter than lateral spine; lateral margin unarmed, bearing numerous long plumose setae. ANTENNA. Article 1 with prolonged, strong mesial process, slightly exceeding antennular peduncle, lateral border with numerous long plumose setae; article 2 with 2 subequal distal spines, barely reaching end of article 3; article 3 with small distomesial and distolateral spine; ultimate segment unarmed. MXP3. Ischium about 1.5 times length of merus, distoventrally bearing spine. Merus with well-developed median spine on flexor margin, extensor margin unarmed. P1. Squamous, with dense short setae on scales, with scattered long setae, length 3.0–3.5 times that of carapace. Merus slightly longer than carpus, armed with some mesial spines, distalmost strongest. Carpus slightly longer than palm, 3 times as long as wide, with several spines along mesial margin. Palm slightly longer than fingers, unarmed. Fingers unarmed, distally curving and crossing, ending in a sharp point. P2–4. Moderately long and slender, squamous, with dense short setae on scales, with some long iridescent setae along extensor margins of all articles. P2 twice carapace length. Meri successively shorter posteriorly (P3 merus 0.7 length of P2 merus, P4 merus 0.7 times length of P3 merus); P2 merus as long as carapace, 5.5–6.0 times as long as wide, 1.7–1.8 times as long as P2 propodus; P3 merus 4.2–4.5 times as long as wide, 1.5 times as long as than P3 propodus; P4 merus 3.5 times as long as wide, 1.3 times as long as P4 propodus. Extensor margins of meri with row of small, proximally diminishing, spines on P2–3, distal spine only on P4; flexor margins with distal spines followed proximally by several eminences; lateral sides unarmed. Carpi with several spines on extensor margin; flexor margin ending in blunt point. Propodi 4.0–4.5 times as long as wide; extensor margin unarmed; flexor margin with 5–7 slender movable spines, without fixed distal spine. Dactyli slender, length 0.8–0.9 times that of propodi; flexor margin with 2–4 movable spinules along entire length; dactylus 6 times as long as wide. Genetic data Sequence data for COI, 16S and PEPCK could be included. The greatest discrimination was shown by COI, with the smallest pairwise sequence divergence of 4.86% between T. aequabilis sp. nov. and T. lupi sp. nov., and the highest (15.42%) between T. aequabilis and T. calvata. Torbenella aequabilis was a sister species of T. orbis (pp = 0.9; Fig. 7). Distribution New Caledonia, between depths of 388 and 403 m. Remarks The new species is morphologically closely related to T. calvata (Macpherson, 2006) and T. crateris sp. nov. from New Caledonia, having the abdominal somite 2 unarmed. Characters distinguishing these species are outlined under the account of T. crateris (see below)., Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on pages 122-123, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/7689432, {"references":["Machordom A., Ahyong S. T., Andreakis N., Baba K., Buckley D., Garcia-Gimenez R., McCallum A., Rodriguez-Flores P. C. & Macpherson E. 2022. Deconstructing the squat lobster genus Munida to reconstruct the evolutionary history and taxonomy of the family Munididae (Crustacea, Anomura, Galatheoidea). Invertebrate Systematics 36: 926 - 970. https: // doi. org / 10.1071 / IS 22013"]}

Torbenella mensae sp. nov. urn:lsid:zoobank.org:act: 1D01DE3B-C8B9-4316-8457-33EE2B7B9526 Fig. 5 Torbenella aff. orbis 2.— Machordom et al. 2022: table 2. Etymology The name ‘ mensae ’ refers to one of the southern hemisphere constellations (the Table Mountain). Material examined Holotype PAPUA-NEW GUINEA • ♂ (7.2 mm); MADEEP stn DW4312; 09°50′ S, 151°34′ E; 120–280 m depth; 3 May 2014; GenBank no.: COI: OP215691, 16S: OP196030, 18S: OP 196288; MNHN-IU-2016-3004. Description CARAPACE. Slightly wider than long. Transverse ridges with dense, very short setae, not medially interrupted. Scales and secondary striae absent between main striae. Gastric region with 2 main epigastric spines, each behind supraocular spine; 3–5 additional minute spines on each lateral side; some small spines at base of rostrum and in parahepatic, hepatic and anterior branchial regions; one small postcervical spine on each side. Orbit with iridescent mesial, rounded mound, lateral limit slightly defined. Frontal margins concave. Lateral margins slightly convex. Anterolateral spine well developed, at anterolateral angle, reaching level of sinus between rostrum and supraocular spines. One small marginal spine anterior to cervical groove. Branchial margins with 4 small spines. Rostrum spiniform, less than half as long as remaining carapace, reaching end of corneae, straight, and directed slightly upwards. Supraocular spines not reaching midlength of rostral spine and falling short of end of corneae, subparallel, directed slightly upwards. THORACIC STERNUM. Smooth, without striae, except a few on sternite 4. Sternite 3 3.2 times as wide as long; sternite 4 3.6 times as wide as long, twice wider than sternite 3. Anterior margin of sternite 4 contiguous to entire posterior margin of sternite 3. ABDOMEN. Somites 2–4 each with 2 median spines on anterior ridge; posterior ridge of somite 4 unarmed. Somites 2–3 each with 3 transverse ridges and several scales in addition to anterior ridge. Somite 4 with a few striae. EYES. Eyes large, corneae dilated, maximum diameter 0.4 times distance between bases of anterolateral spines. ANTENNULE. Article 1 (distal spines excluded) about one-third carapace length, elongate, barely reaching end of corneae, with 2 short distal spines, distomesial spine shorter than distolateral spine; lateral margin unarmed, bearing numerous long plumose setae. ANTENNA. Article 1 with prolonged, strong mesial process, exceeding antennular peduncle, lateral border with long plumose setae; article 2 with 2 distal spines, distomesial slightly larger than distolateral, not reaching end of article 3; article 3 with minute distomesial spine, article 4 unarmed. MXP3. Ischium about 1.5 times length of merus, distoventrally produced to spine. Merus with well developed median spine on flexor margin, extensor margin unarmed. P1. Lost. P2–3 (P4 lost). Moderately long and slender, squamous, with dense short setae on scales, and some long iridescent setae along extensor margins of all articles. P2 2.8 times carapace length. Meri shorter posteriorly (P3 merus 0.9 times length of P2 merus); P2 merus 1.2 times carapace length, 8.5 times as long as wide, 1.6 times as long as P2 propodus; P3 merus 4.0 times as long as wide. Extensor margins of P2–3 meri with row of small proximally diminishing spines; flexor margins with distal spines followed proximally by several eminences; lateral sides unarmed. Carpi with several spines on extensor margin; flexor margin ending in blunt point. P2 propodus 8 times as long as wide; extensor margin unarmed; flexor margin with 9 slender movable spines, without fixed distal spine. P2 dactylus long and slender, 7.5 times as long as wide, length 0.8 times that of propodus; flexor margin with 4 movable spinules along proximal half. Genetic data COI, 16S and 18S were successfully sequenced. CO1 provided the maximum divergence between T. mensae sp. nov. and T. aequabilis sp. nov. (15.17%). The minimum value for this gene and species was 12.87% with respect to T. crateris sp. nov. Torbenella mensae sp. nov. appeared in the phylogenetic reconstruction as a sister species of T. calvata (Fig. 7), but with a low support (pp = 0.62). Remarks Torbenella lupi sp. nov., T. mensae sp. nov. and T. orbis (Baba, 2005) are unique in the genus in having the presence of spines along the anterior ridge of the abdominal somite 2. Torbenella mensae is easily distinguished from the other 2 species by the wider thoracic sternite 3 (more than 3 times as wide as long) and the absence of spines on the posterior ridge of the abdominal somite 4. The other species have the thoracic sternite 3 moderately wide, less than 3 times as wide as long, and the posterior ridge of the abdominal somite 4 usually with small median spines. Torbenella lupi sp. nov. and T. orbis were found at the same station in Papua-New Guinea. Torbenella lupi is distinguished from T. orbis by having spinules on the flexor margin of the P2–4 dactyli, which are absent in T. orbis. Furthermore, these articles are more slender in T. orbis than in the new species (7.5 vs 5.5 times as long as wide). The genetic differences among the three species were: 13.28% for COI between T. mensae and T. lupi sp. nov., and 14.70% between T. mensae and T. orbis (COI), and pairwise distance of 11.12% for 16S between T. mensae and T. orbis; sequence data for 16S was not available for T. lupi. Distribution Papua-New Guinea, between depths of 120 and 280 m., Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on pages 132-136, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/7689432, {"references":["Machordom A., Ahyong S. T., Andreakis N., Baba K., Buckley D., Garcia-Gimenez R., McCallum A., Rodriguez-Flores P. C. & Macpherson E. 2022. Deconstructing the squat lobster genus Munida to reconstruct the evolutionary history and taxonomy of the family Munididae (Crustacea, Anomura, Galatheoidea). Invertebrate Systematics 36: 926 - 970. https: // doi. org / 10.1071 / IS 22013","Macpherson E. 2004. Species of the genus Munida Leach, 1820 and related genera from Fiji and Tonga (Crustacea: Decapoda: Galatheidae). In: Marshall B. A. & Richer de Forges B. (eds) Tropical Deep-Sea Benthos 23. Memoires du Museum national d'histoire naturelle 191: 231 - 292.","Baba K. 2005. Deep-sea chirostylid and galatheid crustaceans (Decapoda: Anomura) from the Indo- West Pacific, with a list of species. Galathea Reports 20: 1 - 317."]}

Heteronida ceres sp. nov. urn:lsid:zoobank.org:act: A70F2B16-2C5B-47C7-AF0F-C938898D8AA8 Figs 1, 6A Heteronida aff. aspinirostris – Machordom et al. 2022: table 2. Etymology The name ‘ ceres ’ (Roman goddess of grains and agriculture) refers to the numerous granules covering the carapace, abdomen, and pereopods. Material examined Holotype NEW CALEDONIA • ♂ (3.5 mm); EXBODI stn CP3927; 18°36′ S, 164°20′ E; 381 m depth; 26 Sep. 2011; MNHN-IU-2013-1847. Paratypes WALLIS AND FUTUNA • 1 ov ♀ (3.1 mm); MUSORSTOM 7 stn DW610; 13°22.5′ S, 176°08.9′ W; 286 m depth; 26 May 1992; MNHN-IU-2017-8968. TONGA • 1 ov. ♀ (3.5 mm); BORDAU 2 stn DW1586; 18°34.20′ S, 173°54.93′ W; 400–487 m depth; 13 Jun. 2000; GenBank no.: PEPCK: OP252460; MNHN-IU-2013-19955. Description CARAPACE. Slightly longer than wide, greatest width measured behind end of anterior cervical groove; dorsal surface densely granulate. Gastric region with strong median process anteriorly blunted, not produced, height less than one-fifth that of carapace (measured in lateral view between dorsal surface and linea anomurica). Cardiac region with somewhat elevated transverse ridge preceded by distinct cervical groove. One low process on each branchial area, near posterolateral angle. Front margins strongly concave. Anterolateral spines strong, blunt, horizontal, directed straight forward, not reaching anterior margin of rostrum. Lateral branchial margins somewhat convex, convergent behind end of posterior cervical groove, with a few small processes, minute anteriormost process bluntly, produced laterally. Rostrum much wider than long, horizontal, dorsal surface with weak median carina; rostral spine absent or obsolescent. Lateral margins convergent anteriorly, ending in minute or obsolescent supraocular spines; anterior margin transverse. THORACIC STERNUM. Sternal plastron 0.7 as long as wide, successively broadened posteriorly. Sternite 3 having anterior margin slightly convex, surface depressed medially, width slightly less than half that of sternite 4; anterior margin of sternite 4 contiguous with entire posterior margin of sternite 3, surface depressed medially ABDOMEN. Abdominal somites 2–3 each with low process flanking median process. Telson subdivided into 7 platelets. EYES. Cornea strongly dilated, without eyelashes; dorsal surface of peduncle granulate. ANTENNULE. Antennular article 1 squamate, with 2 distal spines (distolateral larger than distomesial), and 1 minute lateral spine. ANTENNA. Squamate. Article 1 with stout distomesial process not reaching end of article 2; article 2 elongate, longer than wide, with distomesial and distolateral spines, distomesial larger, not reaching end of article 3; articles 3 and 4 unarmed. MXP3. Ischium 1.5 times as long as merus, with rounded distal process on each of flexor and extensor margins; merus with strong distal spine on extensor margin, a few acute granules on flexor border. P1.1.4–1.7 times as long as carapace, squamate, subcylindrical; merus and carpus with small distomesial spine; palm 1.3–1.4 times as long as fingers. P2–4. Squamate; P2 exceeding P1 carpus. Meri successively shorter posteriorly; extensor margin moderately cristate, with blunt distal spine; flexor margin granulate. Extensor margin of carpi tuberculate, with blunt distal spine. Propodi occasionally somewhat widened distally; flexor margin with movable distal spine; length 0.6 that of merus, as long as or slightly shorter than dactylus on P2, slightly longer than dactylus on P3 and P4. Dactyli slender, somewhat curved; flexor margin with 5–9 minute spines, distal one rather close to tip; extensor margin with plumose setae. COLOUR. Body and P1–P4 light orange. Genetic data Unfortunately, there is no data for the most common and variable markers (COI, 16S). Sequence data was only available for 18S and PEPCK. These genes were almost not variable within the genus Heteronida. The maximum divergence values found were for 18S, but for PEPCK H. ceres sp. nov. did not show any clear divergence when compared to the other species, except for H. clivicola. The new species is different from H. barunae with 1.84% and from H. aspinirostris with 0.15% sequence divergence for 18S, and from H. clivicola up to 0.32% for 18S and 0.17% for PEPCK. In any case, H. ceres sp. nov. forms a well-supported clade (pp = 1) with the other species of the genus Heteronida (Fig. 7). Remarks The new species is closely related to H. aspinirostris (Khodkina, 1981), but it differs in the following features: – The dorsal carapace surface is densely granulated in the new species, whereas it is finely granulated, and not densely so in H. aspinirostris. – The gastric process is low and not anteriorly produced in H. ceres sp. nov., whereas it is prominently high and anteriorly produced in H. aspinirostris. – The rostral and supraocular spines are obsolescent in the new species, whereas these spines are distinct in H. aspinirostris. The abdominal processes are stronger in H. aspinirostris than in H. ceres sp. nov. Distribution New Caledonia, Wallis and Futuna and Tonga, between depths of 286 and 487 m., Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on pages 119-122, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/7689432, {"references":["Machordom A., Ahyong S. T., Andreakis N., Baba K., Buckley D., Garcia-Gimenez R., McCallum A., Rodriguez-Flores P. C. & Macpherson E. 2022. Deconstructing the squat lobster genus Munida to reconstruct the evolutionary history and taxonomy of the family Munididae (Crustacea, Anomura, Galatheoidea). Invertebrate Systematics 36: 926 - 970. https: // doi. org / 10.1071 / IS 22013","Khodkina I. V. 1981. A contribution to the fauna of the family Galatheidae (Decapoda) of the South-west Pacific. Zoologicheskii Zhurnal 8: 1261 - 1264. [In Russian with English summary and translation.]"]}

Torbenella insolita (Macpherson, 2004) Fig. 6B Agononida insolita Macpherson, 2004: 242, fig. 2. Torbenia insolita – Baba 2005: 308. Torbenella insolita – Baba 2008: 1021. — Baba et al. 2008: 181. — Macpherson et al. 2020: 91. Diagnosis Carapace with gastric region with 2 epigastric spines behind supraocular spines, and several minute spines on each side; parahepatic, anterobranchial and postcervical spines present on each side. Anterolateral spine strong, at anterolateral angle, nearly reaching level of sinus between rostrum and supraocular spines. Rostrum spiniform, less than half as long as remaining carapace, slightly carinated dorsally, straight, and slightly upwardly directed. Supraocular spines overreaching midlength of rostrum and not overreaching end of corneas, parallel, directed slightly upwards. Abdominal somites 2–4 with 2 median spines on anterior ridge; posterior ridge of abdominal somite 4 unarmed. Thoracic sternite 3 wide, about 3 times as wide as long. Antennal article 1 with unusually prolonged mesial process, exceeding antennular peduncle, article 2 with distomesial spine strong, overreaching midlength of article 4; article 3 with small distolateral spine; article 4 unarmed. P1–4 moderately long and slender; P2–4 dactyli with extensor margin slightly convex, slightly curving distally, each with 3–6 movable spinules along entire or proximal two-thirds of flexor margin. Material examined NEW CALEDONIA • 3 ♂♂ (5.8–9.5 mm), 5 ov. ♀♀ (7.2–8.1 mm), 1 ov. ♀ (7.5 mm); EXBODI stn CP3927; 18°36′ S, 164°20′ E; 381 m depth; 26 Sep. 2011; GenBank no.: COI: OP215689, 16S: OP196028, 18S: OP196287, PEPCK: OP252563; MNHN-IU-2011-6942, MNHN-IU-2014-13981, MNHN-IU-2013-1857 • 1 ♀ (4.1 mm); Chesterfield Islands, KANADEEP stn DW5015; 21º14′ S, 159º13′ E; 210–470 m depth; 20 Sep. 2017; MNHN-IU-2017-2755. Description COLOUR. Body and appendages whitish. Carapace with some yellowish bands on gastric area and posterior and lateral margins. Orange stripes on distal part of P1 palm, carpus and merus, and P2–4 propodi. Distribution Previously known from New Caledonia, Papua-New Guinea and Tonga, at depths of 120– 386 m. The present material was caught in New Caledonia and Chesterfield Islands at depths of 210– 470 m., Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on page 129, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/7689432, {"references":["Macpherson E. 2004. Species of the genus Munida Leach, 1820 and related genera from Fiji and Tonga (Crustacea: Decapoda: Galatheidae). In: Marshall B. A. & Richer de Forges B. (eds) Tropical Deep-Sea Benthos 23. Memoires du Museum national d'histoire naturelle 191: 231 - 292.","Baba K. 2005. Deep-sea chirostylid and galatheid crustaceans (Decapoda: Anomura) from the Indo- West Pacific, with a list of species. Galathea Reports 20: 1 - 317.","Baba K., Macpherson E., Poore G. C. B., Ahyong S. T., Bermudez A., Cabezas P., Lin C. W., Nizinski M., Rodrigues C. & Schnabel K. E. 2008. Catalogue of squat lobsters of the world (Crustacea: Decapoda: Anomura - families Chirostylidae, Galatheidae and Kiwaidae). Zootaxa 1905: 1 - 220. https: // doi. org / 10.11646 / zootaxa. 1905.1.1","Macpherson E., Rodriguez-Flores P. C. & Machordom A. 2020. Squat lobsters of the families Munididae and Munidopsidae from Papua New Guinea. In: Ahyong S. T., Chan T. - Y. & Corbari L. (eds) Tropical Deep-Sea Benthos 31, Papua New Guinea. Memoires du Museum national d'histoire naturelle 213: 11 - 120."]}

Torbenella calvata (Macpherson, 2006) Torbenia calvata Macpherson, 2006: 678, fig. 4 (New Caledonia, 260–950 m). Torbenella calvata – Baba 2008: 1021 (new combination). — Baba et al. 2008: 181 (compilation). Diagnosis Carapace with transverse ridges usually interrupted, except several on gastric region and posterior part of carapace; gastric region with 2 epigastric spines, behind supraocular spines, and several minute spines on each side; parahepatic, anterobranchial and postcervical spines present on each side. Anterolateral spine of carapace short, not reaching sinus between rostral and supracocular spines. Rostrum spiniform, less than half as long as remaining carapace, slightly carinated dorsally, straight, and slightly upwards directed. Abdominal somite 2 unarmed; posterior ridge of abdominal somite 4 unarmed. Thoracic sternite 3 wide, more than 3 times as wide as long. Antennal article 1 with unusually prolonged mesial process, not exceeding antennular peduncle, distolateral spine of article 2 very strong, exceeding article 3; article 3 with small distolateral spine; article 4 unarmed. P1–4 moderately long and slender; P2–4 dactyli with extensor margin slightly convex, slightly curving distally, each with 1–2 movable spinules on median portion of flexor margin. Material examined NEW CALEDONIA • 1 ♂ (4.6 mm); Chesterfield Islands, EBISCO stn DW2632; 21º03.655′ S, 160º44.673′ E; 297–378 m depth; 21 Oct. 2005; MNHN-IU-2013-19909 • 1 ov. ♀ (5.0 mm); KANADEEP stn CP4947; 24º08′ S, 159º37′ E; 275–276 m depth; 5 Sep. 2017; GenBank no.: COI: OP215688, 16S: OP196026, PEPCK: OP252562; MNHN-IU-2017-2839 • 1 ♂ (4.3 mm); KANADEEP stn CP4948, 24º07′ S, 159º40’ E; 275 m depth; 5 Sep. 2017; MNHN-IU-2017-2636. Distribution New Caledonia, Chesterfield Islands between depths of 260 and 950 m., Published as part of Macpherson, Enrique, Rodríguez-Flores, Paula C. & Machordom, Annie, 2023, Integrative approach to describe new species of squat lobsters of the genera Heteronida Baba & de Saint Laurent, 1996 and Torbenella Baba, 2008 (Decapoda, Munididae) from the Southwestern Pacific Ocean, pp. 116-140 in European Journal of Taxonomy 860 (1) on page 125, DOI: 10.5852/ejt.2023.860.2055, http://zenodo.org/record/7689432, {"references":["Baba K., Macpherson E., Poore G. C. B., Ahyong S. T., Bermudez A., Cabezas P., Lin C. W., Nizinski M., Rodrigues C. & Schnabel K. E. 2008. Catalogue of squat lobsters of the world (Crustacea: Decapoda: Anomura - families Chirostylidae, Galatheidae and Kiwaidae). Zootaxa 1905: 1 - 220. https: // doi. org / 10.11646 / zootaxa. 1905.1.1"]}

Periasamy, Rengaiyan, Kurian, Palayil John, Ingole, Baban (2023): Two new deep-water species of squat lobsters (Crustacea:Anomura: Galatheoidea) from the Central and Southwest Indian Ridge. Zootaxa 5231 (2): 165-178, DOI: 10.11646/zootaxa.5231.2.3, URL: http://dx.doi.org/10.11646/zootaxa.5231.2.3

Typhlonida milindi sp. nov. Figs 5–7 Material examined: Female holotype: NCPOR /HYD-CIR/0048, ♀ (CL 8.6 mm, PCL 3.2 mm), Seamount of the Southwest Indian Ridge, Indian Ocean, R / V ‘ MGS Sagar’ cruise MGS35 (Station No: MGS35C–BD5A), 02 April 2020, 26° 21′ 10.8′′ S, 67° 41′ 27.6′′ E, 2070 to 2404 m, Benthic Sledge, Coll. Periasamy R, samples in 90% ethanol. Ecological note: The specimen was collected along with associated benthic communities of deep-sea fish, glass sponge, and coral in the ferromanganese (Fe–Mn) covered basalt rocky with a thickness of 2–4 cm. Distribution: Typhlonida milindi sp. nov. is known for its type locality in the seamount of the SWIR. Etymology: It is named in honor of our senior scientific colleague — Late Dr. Milind Wakadikar, who contributed diligently to accomplish the objectives of the Indian deep-sea mission, especially the deepsea hydrothermal exploration program. Description: Moderately small species, carapace as long as the width. Dorsal surface with main transverse ridges, without secondary transverse striae between main ridges, and striae lined with short; non-iridescent setae. Epigastric region with 2 pairs of spines, without a median row of spines behind the rostrum. Cervical groove deep; a hepatic region without spines on the dorsal surface. The anterior part of the branchial region between the cervical groove and post-cervical groove with 2 or 3 short tuberculate ridges and often 1 small spine anteriorly, posterior part of the branchial region with 5 transverse ridges excluding posterodorsal ridge. The cardiac region with 2 main transverse ridges. An intestinal region without striae; posterodorsal ridge distinct; without secondary stria. Front margin oblique; inclined posteriorly at 115° from the midline. Lateral margin slightly convex; anterolateral spine very small; far from reaching sinus between rostrum and supraocular spine; 5 spines branchial lateral or margin (Figure 6A). Rostrum spiniform; 0.6× PCL; supraocular spine 0.26× length of the rostrum; exceeding eyes. Epistomial ridge straight ending at antennal gland, mesial protuberance different (Figure 6A). Abdominal tergites unarmed; one transverse continuous stria on the second abdominal segment; without striae from the third to fifth segments. Thoracic sternum sternal surface smooth; sternite 4 with only a few striae. Sternite 3 0.3× width of sternite 4. Sternite 4 anterior margin triangular; narrowly contiguous with sternite 3. Mid-length of the sternal plastron (sternites 4–7) 0.5× width of sternite 7 (Figure 6E). Eye very small eyes; maximum corneal diameter 0.18× distance between anterolateral spines (Figure 6A). Antenna peduncle article 1 distomesial spine almost reaching the distal margin of article 2. Article 2 distomesial spine reaching distal margin of article 3; distolateral spine not reaching midlength of article 3. Articles 3 and 4 unarmed (Figure 6B). Antennule peduncle basal article (distal spines excluded) overreaching corneae; distolateral spine much longer than distomesial spine; 2 lateral spines, proximal smaller; longer lateral spine not reaching the end of distolateral spines (Figure 6C). Third maxilliped surface smooth; ischium with a small distal spine on extensor margin; ischium as long as merus length. Merus with small median spine; carpus; propodus and dactylus unarmed (Figure 6D). Telson with few striae; greatest width 1.2× median length; anterolateral margin weakly concave (Figure 6F). P1 length 2.4–3.2× PCL; covered in rows of short plumose setae. Merus length 0.9–1.1× PCL; with a row of 2 large spines and 2 small spines on dorsal margin; 1 strong spine on dorsolateral margin; 4 spines on mesial margin; distomesial spine not reaching midlength of the carpus. Carpus length 0.5× merus; length 3× width, with 6 spines along the mesial margin. Propodus 1.3× merus length; palm with a row of 3 or 4 spines on the dorsal surface of the palm; fingers 0.4–0.5× total propodus length; without spines on outer margins (Figure 7). P2–4 long and slender; with few small scales on lateral sides of meri and carpi; extensor margin with short plumose setae and few longer setae. P2 1.8–2.3× PCL; merus 0.7–0.8×PCL; length 8× width; 3.0× carpus length; 1.5× propodus length; extensor margin with 5–7 spines; flexor margin with 3 spines; well-developed distal spine; carpus extensor margin with the spine at midlength and a distal end; flexor margin with distal spine; propodus length about 8×height; with 5 movable flexor spines on flexor margin; dactylus gently curved distally; 0.6–0.7× propodus length, length about 7× height, extensor margin densely lined with stiff short setae on distal half; flexor margin armed along the entire length with 10–12 movable spines including spine at the base of unguis (Figure 7F). The end of P2 carpus does not reach the end of P1 merus. P3 with similar spination and article proportions as P2; merus 0.9× P2 merus length; propodus; and dactylus as long as those of P2. P4 length 0.7–0.8× P2 length, merus length 0.3–0.5× PCL; propodus and dactylus similar in length to those of P3; merocarpal articulation reaching hepatic marginal spine carapace (Figure 7). Colour in life: carapace pink anteriorly fading to white at posterior; abdominal somite 2 white; somites 3–6 pink, P1 and P2–4 white. Genetic data: DNA sequencing for this species was successful for mtCOI gene (Accession numbers: COI: OP311615). The average K2P distance between the morphologically closest Typhlonida tiresias (AY351014) and the SWIR specimen was 0.04% for COI. Remarks: The SWIR new species is the closest relative of Typhlonida tiresias (Macpherson, 1994) and T. parvioculata (Baba, 1982). The new species from SWIR can be differentiated from Typhlonida tiresias by gastric region with a row of epigastric spines, extensor border of merus of the third maxilliped, and the shape of the sternite 3. While T. parvioculata has a second abdominal segment with 2 to 4 spines anteriorly, a third maxilliped merus elongates with 2 prominent inner marginal spines of subequal size: one distal and another proximal to midlength and not in Typhlonida milindi sp. nov., Published as part of Periasamy, Rengaiyan, Kurian, Palayil John & Ingole, Baban, 2023, Two new deep-water species of squat lobsters (Crustacea: Anomura: Galatheoidea) from the Central and Southwest Indian Ridge, pp. 165-178 in Zootaxa 5231 (2) on pages 171-175, DOI: 10.11646/zootaxa.5231.2.3, http://zenodo.org/record/7575272, {"references":["Macpherson, E. (1994) Crustacea Decapoda: studies on the genus Munida Leach, 1820 (Galatheidae) in New Caledonia and adjacent waters with descriptions of 56 new species. In: Crosnier A, (Ed). Resultats des Campagnes MUSORSTOM. Vol. 12. Memoires du Museum National d'Histoire Naturelle, 161, 421 - 569.","Baba, K. (1982) Deep-sea galatheidean Crustacea (Decapoda, Anomura) taken by the R / V Soyo-Maru in Japanese waters. II Family Galatheidae. Bulletin of the National Science Museum, Tokyo, Series A, 8, 103 - 120."]}

Raymunida shraddhanandi sp. nov. (Figures 2 (a–), 3(a–3), Figure 4 and Figure 5) urn:lsid:zoobank.org:act: 4A3E0887-2772-4221-9734-ADB4C4D9328D Type material Holotype. India • ♂ (PCL 9.7 mm, CW 8.2 mm); Andaman Sea, off Little Andaman Island; FORVSS stn. 38806; 10.72°N, 92.7°E; 53 m depth; Chain dredge; 10 August 2019; Vinay P. Padate leg.; CMLRE IO /SS/ANO/00141. Paratype. India • 1 ♀ (PCL 5.8 mm, CW 4.9 mm); same data as for holotype; CMLRE IO /SS/ ANO/00140. Type locality India: Andaman Sea, off Little Andaman Island; 10.72°N, 92.7°E; 53 m depth. Etymology The species is named in honour of the Swami Shraddhanand College, University of Delhi, the alma mater of the first author. Diagnosis Carapace (exclusive of rostrum) 1.2 times as long as wide; dorsal surface with sparse long iridescent setae, 5 pairs of epigastric spines, 0–1 anterior branchial spine, 1 parahepatic spine and 1 post-cervical spine on either side; frontal margin with short spine mesial to anterolateral spine; branchial margin with 4 spines (2 on each of anterior and posterior margins). Rostrum 0.4 times PCL, 2 times longer than supraocular spines. Anterior margin of thoracic sternite 4 as wide as sternite 3, sternites 5–7 smooth or with few short oblique striae on lateral portions. Pleonal tergites 2 and 3 each with or without row of interrupted, short striae between 2 transverse ridges. Antennular peduncle article 1 (excluding distal spines) not reaching distal corneal margin. Antennal peduncle article 1 with distomesial spine slightly overreaching distal margin of article 3, not reaching distal margin of antennular peduncle article 1; article 2 with distomesial spine reaching distal margin of article 3, unarmed on mesial margin; article 3 with short distomesial spine. Mxp3 merus with dorsodistal spine, ventral margin with 2 slender spines;carpus with 1 or 2 distal spines on ventral margin. P1 3.1–3.6 times PCL,with numerous long, simple setae; chela 4.6 (paratype female) to 7.5 (holotype male) times as long as wide, with dorsolateral row of sparsely arranged spines; fingers each with distinct rounded crest along dorsal midline. P2–4 meri squamate on lateral surface, P4 mero-carpal articulation reaching level of lateral end of anterior cervical groove of carapace. Description of holotype Carapace (Figures 2 (a), 2(a), 2(a, 2)) (exclusive of rostrum) 1.2 times as long as wide, bearing a few long iridescent setae dorsally; transverse striae with dense short setae; gastric region with 6 transverse striae and 5 pairs of spines (epigastric spines); cardiac region with 2 complete transverse striae followed by 2 median striae and 1 pair of lateral striae; intestinal region with 3 transverse striae, first and third complete, second interrupted medially. One parahepatic and 1 postcervical spine present on each side; anterior branchial spines absent. Frontal margin moderately oblique, with 1 small spine between supraocular spine and anterolateral spine. Lateral margin gently convex. Anterolateral spine distinct, but falling far short of level of sinus between rostrum and supraocular spine, followed by small spine anterior to cervical groove. Anterior and posterior branchial margins each with 2 spines, posteriormost spine smallest. Rostrum spiniform, 0.4 times PCL, 2 times longer than supraocular spines, directed slightly downward. Supraocular spines horizontal, subparallel, overreaching distal margin of cornea. Thoracic sternite 3 (Figure 4 (c)) 3.3 times as wide as long, with 2 flattened lobes separated by shallow V-shaped notch on anterior margin, anterior margins of lobes faintly granulate, lateral angle with distinct acute projection. Sternite 4 with anterior margin as wide as sternite 3, with 2 transverse striae, anterior stria medially interrupted, bearing sparse setae, posterior stria uninterrupted. Sternites 5 and 6 with short oblique stria on each lateral portion. Sternite 7 with few short striae laterally. Pleonal tergites (Figure 4 (d)) with few moderately long iridescent setae and row of short plumose setae on transverse ridges; tergites 2 and 3 each with row of short, interrupted striae between 2 transverse ridges, tergite 4 without striae between 2 transverse ridges; tergites 5 and 6 with 2 medially interrupted ridges, those on tergite 5 longer and nearly straight, those on tergite 6 somewhat squamiform. Eye (Figure 4 (a)) moderately large, corneal diameter 0.3 times distance between mesial bases of anterolateral spines, eye lashes simple and relatively short, long stout seta on rounded dorsodistal margin of peduncle. Antennular peduncle article 1 (Figure 4 (f)) (distal spines excluded) only reaching proximal margin of cornea; distomesial spine distinctly shorter than distolateral spine; 2 lateral spines, anterior spine distinctly overreaching tip of distolateral spine, posterior spine much shorter than anterior spine. Antennal peduncle article 1 (Figure 4 (f)) with long distomesial spine slightly overreaching distal margin of article 3, not reaching distal margin of antennular article 1; article 2 with distomesial spine reaching distal margin of article 3, distolateral spine nearly reaching distal margin of article 3, mesial margin unarmed; article 3 with short distomesial spine; article 4 unarmed. Mxp3 (Figure 4 (g)) ischium subequal in length to merus measured along dorsal margin, with strong spine each at dorsodistal and ventrodistal angles; crista dentata consisting of 33 denticles. Merus with small dorsodistal spine; ventral margin with 3 spines, second spine much smaller than other 2 slender main prominent spines. Carpus with 2 spines distally on ventral margin. Epipod present. P1 (Figure 4 (h,)) subequal from right to left, massive, 3.6 times PCL, moderately depressed, with numerous long, iridescent setae; surfaces of merus, carpus and palm of chela squamate. Merus 1.1 times PCL; dorsal and ventral surfaces each with 2 irregular rows of spines, distomesial spine strongest; mesial surface with 2 spines distal to mid length, distal spine much larger than proximal spine; lateral surface with 1 subdistal spine, ventrolateral margin with 1 small distal spine. Carpus with 2 irregular rows of spines on dorsal surface and with 1 spine each on ventral surface, mesial margin and lateral margin; mesial margin also with elongated spine on distal one-third. Chela 4.6 (left) or 4.8 (right) times as wide as long. Palm 1.3 times longer than carpus, 2.1 (right) or 2.3 (left) times as long as wide; dorsal surface with 2 irregular rows of spines and small spine at dactylar articulation; ventral surface with 1 mesial spine at mid length; mesial surface with longitudinal row of 4 spines; lateral margin with row of sparsely arranged spines extending to entire length of fixed finger. Fingers distally broken, but distinctly longer than palm at least, each with rounded longitudinal crest on dorsal surface; fixed finger curved on proximal half; dactylus with 3 spines on proximal one-third portion, 1 median spine and small, unevenly spaced spinules on distal portion of mesial margin; occlusal margins minutely dentate, dactylus with blunt teeth on proximal one-third fitting into large concavity on proximal half of fixed finger. P2–4 (Figure 4 (j–)) somewhat compressed laterally, 2.1 (P2, P3) and 1.7 (P4) times PCL; P4 mero-carpal articulation reaching only level of first branchial spine (lateral end of anterior cervical groove of carapace) (Figure 2 (a)); meri 6.3 (P2), 4.5 (P3) and 3.5 (P4) times as long as wide, 0.9 (P2), 0.8 (P3) and 0.6 (P4) times PCL, 3.0 (P2), 2.6 (P3) and 2.2 (P4) times longer than carpi; propodi 7.5 (P2), 6.7 (P3) and 5.7 (P4) times as long as wide, 2.1 (P2), 2.0 (P3) and 1.9 (P4) times longer than carpi, 2.3 (P2), 2.2 (P3) and 2.0 (P4) times longer than dactyli. Meri covered with distinct squamiform ridges on lateral and mesial surfaces; dorsal margins each with row of 10 (P2), 6 (P3) and 3 (P4) spines randomly arranged and increasing in size distally; lateral surfaces each with dorsal row of 3 (P2), 9 (P3) and 8 (P4) spines; ventral margins with 4 (P2), 3 (P3) and 2 (P4) spines on distal one-third. Carpi with 5 (P2), 4 (P3) and 1 (P4) dorsal spines; ventral margins each with 1 distal spine. Propodi dorsally unarmed; ventral margins with 7 (P2), 4 (P3) and 4 (P4) slender corneous spines. Dactyli with 6 (P2), 5 (P3) and 4 (P4) slender corneous spines on ventral margins. Epipods present on P1–3. Male with G1 (Figure 4 (n)) and G2 (Figure 4 (o)) as illustrated. Uropodal protopod (Figure 4 (e)) with 1 distal spine and proximal produced portion on lateral margin; endopod broader than exopod, lateral and distal margins each with row of spines (lateral spines damaged); exopod also spinose on lateral and distal margins. Variations The female paratype differs from the male holotype in the following points, although the difference in the P1 represents sexual dimorphism. Carapace (Figure 5 (a)) bearing 1 anterior branchial spine on dorsal surface. Thoracic sternites 5–7 (Figure 5 (b)) smooth. Pleonal tergites 2 and 3 (Figure 5 (a)) without striae. Antennal peduncle article 2 with distomesial spine feebly overreaching distal margin of article 3 (Figure 5 (c)). Mxp3 (Figure 5 (d)) merus with only 2 main spines on ventral margin, carpus with 1 distal spine on ventral margin. P1 slender, 3.1 times PCL, chela 7.5 times as long as wide; palm subequal in length to carpus, ventral surface with 2 irregular longitudinal rows of spines, lateral margin with row of spines extending to distal one-fourth of fixed finger; fingers about 1.9 times as long as palm, parallel to each other, occlusal margins minutely dentate, each with slightly larger acute teeth at regular intervals. P2–4 (Figure 5 (f–i)) 1.9 (P2), 2.2 (P3) and 1.7 (P4) times PCL; meri with 4 (P2), 4 (P3) and 2 (P4) spines on dorsal margins, lateral surfaces with dorsal row of 6 (P2) and 6 (P4) spines, P4 ventral margin with only 1 distal spine; carpi with 4 (P2), 3 (P3) and 2 (P4) spines on dorsal margins; P2 propodus and dactylus each with 5 ventral spines. Remarks Among the known congeners, R. shraddhanandi sp. nov. is morphologically closest to R. formasanus (known from Taiwan and the south-eastern Australia, 104–300 m depths) in having the carapace with some long setae on the dorsal surface, the frontal carapace margin with a small spine mesial to the anterolateral spine, the antennal peduncle article 2 without a small spine on the mesial margin, the P1 bearing numerous long simple setae, the P1 fixed finger with a row of relatively sparse spines on the dorsolateral margin, and the P1 dactylus with a distinct longitudinal crest along the dorsal midline. However, the new species differs from R. formasanus) in the following characters (see Ahyong and Poore 2004; Lin et al. 2004). (1) The anterior branchial carapace region is unarmed or has only one spine, instead of three to five spines as in R. formasanus. (2) The distomesial spine of the antennal peduncle article 2 reaches only or feebly overreaches the distal margin of the article 3, while it clearly overreaches that margin in R. formasanus based on the re-examination of the holotype. (3) The antennal peduncle article 3 has a short distomesial spine, which is absent in R. formasanus. (4) The Mxp3 merus has a small but distinct dorsodistal spine, which is absent in R. formasanus. (5) The P4 mero-carpal articulation reaches only the lateral end of the anterior cervical groove of the carapace, whereas it overreaches the frontal margin of the carapace in R. formasanus. Munida alcocki Southwell,1906 was described from the Gulf of Mannar (Dutch Modragam Paar and Aripu Reef,off western coast of Sri Lanka),in shallow water to a depth of 66 m. The identity of the taxon is not clear, although it has been questionably included in the synonymy of Raymunida elegantissima (see Baba et al. 2008). Southwell (1906) described Munida alcocki as having seven spines on the carapace lateral margin; the number agrees only with that of R. iranica;in the other known Raymunida species,only five or six spines are present (Osawa and Safaie 2014). It is unlikely that Munida alcocki is conspecific with the present new taxon. Geographical distribution So far known only from the Andaman Sea, 53 m depth., Published as part of Tiwari, Shivam, Padate, Vinay P., Cubelio, Sherine S. & Osawa, Masayuki, 2022, Squat lobsters of the genera Raymunida Macpherson & Machordom, 2000 and Munidopsis Whiteaves, 1874 (Decapoda: Anomura: Galatheoidea) from the Indian Exclusive Economic Zone, with descriptions of three new species, pp. 1819-1839 in Journal of Natural History 56 on pages 1822-1829, DOI: 10.1080/00222933.2022.2138600, http://zenodo.org/record/7380764, {"references":["Macpherson E. 2009. New species of squat lobsters of the genera Munida and Raymunida (Crustacea, Decapoda, Galatheidae) from Vanuatu and New Caledonia. Zoosystema. 31 (3): 431 - 451. doi: 10. 5252 / z 2009 n 3 a 3.","Ahyong ST, Poore GCB. 2004. Deep-water Galatheidae (Crustacea: Decapoda: Anomura) from southern and eastern Australia. Zootaxa. 472: 1 - 76. doi: 10.11646 / zootaxa. 472.1.1.","Lin CW, Chan TY, Chu KH. 2004. A new squat lobster of the genus Raymunida (Decapoda: Galatheidae) from Taiwan. J Crustac Biol. 24 (1): 149 - 156. doi: 10.1651 / C- 2432.","Southwell T. 1906. Report on Anomura collected by Professor Herdman, at Ceylon, 1902. Report to the Government of Ceylon on the Pearl Oyster Fisheries of the Gulf of Mannar. Supplementary Report. 5: 211 - 224.","Baba K, Macpherson E, Poore GCB, Ahyong ST, Bermudez A, Cabezas P, Lin CW, Nizinski M, Rodrigues C, Schnabel KE. 2008. Catalogue of squat lobsters of the world (Crustacea: Decapoda: Anomura - Families Chirostylidae, Galatheidae and Kiwaidae). Zootaxa. 1905 (1): 1 - 220. doi: 10.11646 / zootaxa. 1905.1.1.","Osawa M, Safaie M. 2014. Two squat lobster species (Crustacea: Decapoda: Anomura) from the Persian Gulf, with description of a new species of Raymunida Macpherson & Machordom, 2000. Zootaxa. 3861 (3): 265 - 274. doi: 10.11646 / zootaxa. 3861.3.4."]}

Raymunida vittata Macpherson, 2009 (Figures 2 (c), 2(c) 2 2) Raymunida vittata Macpherson, 2009: 446, figure 7 (type locality: Vanuatu, SANTO 2006, stn DB16, 15.59°S, 167.26°E, 32–40 m depth); Osawa 2012: 140, 143 (key), figures 3, 4(b); Poupin et al. 2022: 21, figure 9(f). Material examined India • 1 ♀ (PCL 9.0 mm, CW 7.7 mm); Andaman Sea, off Little Andaman Island; FORVSS stn. 38806; 10.72°N, 92.7°E; 53 m depth; Chain dredge; 10 August 2019; Vinay P. Padate leg.; CMLRE IO /SS/ANO/00142. Remarks Morphological characters of the present specimen, including the carapace armature (Figure 6 (a,)), the striations on thoracic sternites and pleonal tergites (Figure 6 (c)), the relative lengths of spines on the antennal peduncle articles 1 and 2 (Figure 6 (e)), and the armatures of Mxp3 (Figure 6 (e)) and P3–4 (Figure 6 (g–)), fall within the range of intraspecific variations of the type material from Vanuatu (Macpherson 2009) and subsequently reported material from south-western Japan (Osawa 2012). Geographical distribution Vanuatu (Macpherson 2009), Ryukyu Islands, south-western Japan (Osawa 2012), Mayotte Island, south-western Indian Ocean (Poupin et al. 2022), Andaman Islands, India (present study); bathymetric range: 32–123 m depth (Macpherson 2009; Osawa 2012). The present occurrence of R. vittata in the eastern Indian Ocean suggests that the species is widely distributed in the Indo-West Pacific although literature records are still scattered., Published as part of Tiwari, Shivam, Padate, Vinay P., Cubelio, Sherine S. & Osawa, Masayuki, 2022, Squat lobsters of the genera Raymunida Macpherson & Machordom, 2000 and Munidopsis Whiteaves, 1874 (Decapoda: Anomura: Galatheoidea) from the Indian Exclusive Economic Zone, with descriptions of three new species, pp. 1819-1839 in Journal of Natural History 56 on pages 1829-1830, DOI: 10.1080/00222933.2022.2138600, http://zenodo.org/record/7380764, {"references":["Macpherson E. 2009. New species of squat lobsters of the genera Munida and Raymunida (Crustacea, Decapoda, Galatheidae) from Vanuatu and New Caledonia. Zoosystema. 31 (3): 431 - 451. doi: 10. 5252 / z 2009 n 3 a 3.","Osawa M. 2012. Raymunida Macpherson & Machordom, 2000 (Crustacea: Decapoda: Anomura: Munididae) from the KUMEJIMA 2009 Expedition in the Ryukyu Islands, Japan. Zootaxa. 3367 (1): 134 - 144. doi: 10.11646 / zootaxa. 3367.1.13.","Poupin J, Barathieu G, Konieczny O, Mulochau T. 2022. Crustaces (Decapoda, Stomatopoda) dans la zone meso-photique corallienne de Mayotte (Sud-Ouest Ocean Indien). Naturae. 2022 (8): 133 - 167. doi: 10.5852 / naturae 2022 a 8."]}

Tiwari, Shivam, Padate, Vinay P., Cubelio, Sherine S., Osawa, Masayuki (2022): Squat lobsters of the genera Raymunida Macpherson & Machordom, 2000 and Munidopsis Whiteaves, 1874 (Decapoda: Anomura: Galatheoidea) from the Indian Exclusive Economic Zone, with descriptions of three new species. Journal of Natural History 56: 1819-1839, DOI: 10.1080/00222933.2022.2138600, URL: http://dx.doi.org/10.1080/00222933.2022.2138600

Environmental variables are pivotal factors for the condition of marine invertebrate species with a complex life cycle, influencing larval biochemical composition, and therefore, indirectly...

This checklist is the fourth contribution resulting from a long-term multidisciplinary project which combined morphological analyses and molecular techniques (mitochondrial DNA markers) for accurate identification of marine and coastal decapod crustaceans of São Paulo State (Brazil). We provide a list of 63 species of the following 11 families of 4 superfamilies of Anomura: Albuneidae (4 spp.), Blepharipodidae (1 sp.), Chirostylidae (1 sp.), Diogenidae (18 spp.), Hippidae (1 sp.), Munididae (8 spp.), Munidopsidae (1 sp.), Paguridae (13 spp.), Parapaguridae (2 spp.), Porcellanidae (13 spp.), and Pylochelidae (1 sp.). Seven species previously reported from the region were neither collected nor found in museum collections during our study, including one (Sympagurus dimorphus) that we suggest to be removed from São Paulo coast fauna lists. We generated new sequences of cytochrome oxidase subunit I (barcode region) and 16S genes of 44 species. This anomuran inventory may serve as guideline for future studies on taxonomy, conservation, population genetics, biogeography, and phylogenetics, which might flag species that deserve further investigations and concerns.

We determined the mitogenome sequence of Munida gregaria (Fabricius 1793) (Anomura, Galatheoidea, Munididae), which is the first complete mitogenome sequence in the family Munididae Ahyong et al., 2010. The mitogenome of M. gregaria is 16 326 bp in length and contains 13 protein-coding genes (PCGs), 22 transfer RNAs (tRNAs), two ribosomal RNAs (rRNAs) and two control regions (CRs). Mitogenome analysis of M. gregaria showed an extra copy of the CR and rearrangements of two PCGs (nad2 and nad3) compared to the arthropod ground pattern. Additionally, it contains a tRNA (trnY) inversion and rearrangements of two PCGs (nad1 and nad3) when compared with that of Neopetrolisthes maculatus and Shinkaia crosnieri, respectively. The phylogenetic tree confirmed that M. gregaria belongs to the superfamily Galatheoidea within Anomura. Our results will be useful for the detailed study of mitogenome evolution and the phylogenetic relationships among the superfamily in the infraorder Anomura.

Este artículo contiene 18 páginas, 5 figuras., Munida diritas sp. nov. is described for the seamounts near Desventuradas Islands, in the intersection of the Salas & Gómez and Nazca Ridges, Chile. Specimens of the new species were collected in the summit ( 200mdepth) of one seamount and observed by ROV at two nearby ones. This species is characterized by the presence of distinct carinae on the thoracic sternites 6 and 7. Furthermore, it is not related with any species from the continental shelf nor the slope of America, while it is closely related to species of Munida from French Polynesia and the West-Pacific Ocean (i.e., M. ommata, M. psylla and M. rufiantennulata). In situ observations indicate that the species lives among the tentacles of ceriantarid anemones and preys on small crustaceans. The discovery of this new species adds to the knowledge of the highly endemic benthic fauna of seamounts of the newly created Nazca-Desventuradas Marine Park, emphasizing the relevance of this area for marine conservation., This work was supported by grants (CONA C22 16-09, FONDECYT 1181153, FONDEQUIP EQM 150109) and ANID-Millennium Science Initiative Program-ESMOI. Beca Magister Nacional CONICYT # 22190560 (now ANID) to Jan M. Tapia Guerra, Beca Postdoctorado Universidad Católica del Norte No 003 to María de los Ángeles Gallardo.

Este artículo contiene 7 páginas, 2 figuras., Munida vassilyi sp.n. and M. hastata sp.n. are described from Kei Islands, Indonesia. Munida vassilyi sp.n. is morphologically related to M. runcinata, from New Caledonia, Vanuatu, Wallis and Futuna, Fiji and Tonga, whereas M. hastata sp.n. is more similar to M. aurantiaca from Papua – New Guinea. Pairwise genetic distances estimated using the COI and 16S rRNA gene fragments indicated high levels of sequence divergence between each new species and their most closely related allies., The study was partially supported by the GALETTE project (Galatheoidea lobster adaptations to deep sea environments), co-funded by the CNRS (France) and the CSIC (Spain) (2018FR0053).

Squat lobster specimens belonging to the family Munididae were recently collected along the southwestern coast of the mainland of India and in the Andaman Islands. The specimens belong to two known species, Agononida prolixa (Alcock, 1894) and Munida compacta Macpherson, 1997, and a new species, Paramunida bineeshisp. nov. We here redescribe A. prolixa and describe and figure the new species. Munida compacta is newly recorded from India, and we figure the live coloration. In addition, molecular and phylogenetic analyses of two mitochondrial markers (16S rRNA and COI) revealed the phylogenetic relationships of M. compacta and P. bineeshisp. nov. with their most closely related congeners. The genetic similarity among the individuals of M. compacta from different locations is also addressed.

Este artículo contiene 12 páginas, 3 figuras., Hendersonida parvirostris sp. nov. is described from Papua New Guinea. The new species can be distinguished from the only other species of the genus, H. granulata (Henderson, 1885), by the fewer spines on the dorsal carapace surface, the shape of the rostrum and supraocular spines, the antennal peduncles, and the length of the walking legs. Pairwise genetic distances estimated using the 16S rRNA and COI DNA gene fragments indicated high levels of sequence divergence between the new species and H. granulata. Phylogenetic analyses, however, recovered both species as sister species, supporting monophyly of the genus., The study was partially supported by the projects of the Spanish Ministry of Economy and Competitiveness (CTM2014-57949-R and CTM2013-48163-C2). EM is part of the research group 2014SGR-120 of the Generalitat de Catalunya.

A new species of the genus Munida Leach, 1820, is described and illustrated based on a single specimen from the deep-sea hydrothermal vent on the Eastern Pacific Rise. Munida alba sp. nov. closely resembles M. ampliantennulata Komai, 2011, M. watatsumin Komai, 2014. and M. magniantennulata, but differences in the morphologies of the third maxilliped, pollex of the cheliped and the third segment of the antennal peduncle readily distinguish the new species from the three relatives. The new species is the fourth of the genus occurring at the hydrothermal vent areas.

A total of 806 specimens of Agononida longipes (A. Milne-Edwards, 1880), munidid crustaceans of the order Decapoda, were collected in 1998 and 2001 along the Colombian Caribbean coast. These samples were used to determine biological aspects and distribution patterns of the species. A population analysis was conducted based on the length of the carapace, sex ratio, number of ovigerous females, average number of eggs, and occurrence of parasitism. These data were compared with the geographic distribution and bathymetry. Results showed differences in sex ratio and higher abundance levels north of the Magdalena River mouth. This could result from abiotic factors such as differences in salinity and temperature due to the prevalence of seasonal upwelling in the northern Colombian Caribbean Sea, as well as the origin and type of sediments and the amount of organic material. Morphometric evidence revealed sexual dimorphism in size, with females being larger than males and the largest individuals found at the greatest depths. The smallest ovigerous female had 10.9 mm of carapace length, and 65.1% were carrying eggs. The number of eggs per female varied between 100 and 5953, with an average of 1360.3. The eggs were elliptical, with an average major axis of 0.56 and an average minor axis of 0.52 mm. Parasitism was low at 3.1% for isopods and 1.0% for rhizocephalan.

The squat lobsters Munida Leach, 1820 and Agononida Leach, 1820 are part of the most speciose genera in the diverse family Munididae. Despite the considerable diversity (>240 species), the Brazilian waters encompass 18 species so far (17 Munida and 1 Agononida), only 7 (6 and 1, respectively) of which recorded from the coast of Sao Paulo. The decapod fauna along the coast of Sao Paulo has been studied in the recent past, mostly using classical alpha morphology. In the present study, we carried out a molecular analysis to phylogenetically contextualize the species of Munida and Agononida and address future directions on the systematics of the group. The current investigation results from a long-term multidisciplinary taxonomic project that combined analyses of adult specimens for accurate and detailed identification of the biodiversity of marine decapod crustaceans from Sao Paulo state. Sampling was carried out in five major regions along the Sao Paulo coast from 2011 to 2018: Ubatuba, Caraguatatuba, Sao Sebastiao and Ilhabela, Santos and Sao Vicente, and Cananeia and Ilha Comprida. Additional material from the MZUSP collections was used to complete the analysis when fresh material was not obtained during the surveys. Previous to molecular analysis, the material was identified by classical literature. We obtained six species out of seven recorded, with sequences of cytochrome oxidase subunit I – barcode region and 16S generated from six species. We include additional genera and close species to run the analysis to better contextualize the phylogenetic positioning of the target species. Our tree shows a clear recognition of some of Sao Paulo species and points out systematics inconsistencies in Munididae. Based on the present results, and pending future more complete analyses, Munididae should be revised.

One hundred sixty-eight crustacean species were identified in a study of the deep-sea benthic megafauna conducted along the upper continental slope (300–1200 m depth) of the Mexican Gulf of Mexico. A total of 18 cruises were conducted on board the R/V Justo Sierra of the Universidad Nacional Autonoma de Mexico from off Tamaulipas to Yucatan. Samples were obtained with a commercial shrimp trawl net (18 m mouth aperture, 4.5 cm stretched mesh, 1.5 cm stretched mesh cod-end). The Decapoda were the dominant taxa and comprised 46 families, 94 genera, and 162 species. Three species of Lophogastrida and two genera with one species each of Stomatopoda were also encountered. The records of the only genus and species of Isopoda, Bathynomus giganteus, extended its geographical range. Comparing families, Munidopsidae was the most speciose (20), followed by the Pandalidae (11), Acanthephyridae (9), Munididae (9), Oplophoridae (7), and Paguridae (7). The rest of the families were only presented a low number of species (< 5). The south-southwest sector of the Gulf of Mexico exhibited the highest richness and abundance. For several species extensions of their bathymetrical and geographical ranges were recorded. The faunal composition in the southern Gulf of Mexico showed differences compared to northern region.

20 páginas, 4 figuras., Squat lobster specimens belonging to the family Munididae were recently collected along the southwestern coast of the mainland of India and in the Andaman Islands. The specimens belong to two known species, Agononida prolixa (Alcock, 1894) and Munida compacta Macpherson, 1997, and a new species, Paramunida bineeshi sp. nov. We here redescribe A. prolixa and describe and figure the new species. Munida compacta is newly recorded from India, and we figure the live coloration. In addition, molecular and phylogenetic analyses of two mitochondrial markers (16S rRNA and COI) revealed the phylogenetic relationships of M. compacta and P. bineeshi sp. nov. with their most closely related congeners. The genetic similarity among the individuals of M. compacta from different locations is also addressed.

Munida michaeli, a new species of deep-sea squat lobster (Munididae), is described and illustrated on the basis of a single male specimen collected off Okinawa Island, Ryukyu Islands, Japan, at depths of 641-650 m. It closely resembles M. sacksi Macpherson, 1993 known with certainty only from the Philippines, but different spination of the carapace dorsum and the greatly reduced armature of the flexor margins of the ambulatory dactyli distinguish the new species from the latter. With the addition of the present new species, 41 species of Munida Leach, 1820 are now known from Japanese waters.

Squat lobsters are distributed worldwide and are ecologically important in deep-sea bottoms. Agononida longipes is reported as the most abundant squat lobster in the southern Gulf of Mexico, and also occurs along the coast of Brazil and in the Colombian Caribbean. This study aimed to describe the spatial and bathymetric distribution of biomass and size structure of the squat lobster A. longipes in the Colombian Caribbean. Specimens were collected in the Colombian Caribbean between 100 and 550 m of depth. A total of 826 deep-sea squat lobsters was caught and analyzed. The size of A. longipes females and males ranged from 21.17 to 57.43 mm TL (mean 45.07 ± 5.51 mm) and from 23.59 to 54.85 mm TL (mean 42.96 ± 5.60 mm), respectively, revealing smaller mean sizes for males than for females. The length-weight relationship showed negative allometric growth for both sexes. Agononida longipes presented the highest abundance in the depth strata 300-400 m with the highest biomass in front of Riohacha in the northern zone and front of Cartagena in the southern zone. The highest abundance of this species in the northern zone of the Colombian Caribbean coincided with a high diversity of other potential deep-sea fishing resources. The knowledge about the distribution, abundance and life cycle of A. longipes is imperative for proper management under an ecosystem approach.

Squat lobsters are highly diversified and widespread decapods, of which only three species form pelagic swarms. Here we infer the expansion of Munida gregaria populations in the Beagle Channel and the Argentine Patagonian Shelf by means of acoustic surveys of pelagic swarms. We also describe the habitat characteristics in which these swarms occur. Acoustic data was collected during three multidisciplinary scientific cruises on board of the R/V Puerto Deseado during 2009, 2012 and 2014. Despite differences in the environmental conditions between the two surveyed areas, between 2009 and 2014 pelagic swarms increased their occurrence and abundance both in the Beagle Channel and on the Argentine Patagonian Shelf. Towards the end of the studied period, pelagic swarms of M. gregaria occurred in new locations, supporting the notion of a population expansion. Within the Beagle Channel swarm expansions were more marked than on the Patagonian Shelf. We here postulate that M. gregaria expansions occur in association with productive areas of the Argentine continental shelf, such as frontal zones, favoured by the squat lobster phenotypic plasticity that permit to exploit resources in both the neritic and benthic environments. At a regional scale on the Patagonian Shelf, three main groups of pelagic swarms of M. gregaria were clearly associated to respective frontal zones. The information presented here is necessary to understand fluctuations in both distribution and abundance patterns of a key species on the Argentine continental shelf. These fluctuations could be direct or indirect indicators of changes in the ecosystem. Fil: Diez, Mariano Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Cabreira, Ariel Gustavo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina Fil: Madirolas, Adrian Osvaldo. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina Fil: Lovrich, Gustavo Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina

One of the key factors affecting larval survival is food availability. This study investigated the influence of starvation on the nutritional condition of zoea I larvae of Pleuroncodes monodon. Experimental treatments with differential periods of starvation and subsequent feeding (point of no return: PNR) in addition to treatments with differential periods of feeding and subsequent starvation (point of reserve saturation: PRS) were used to quantify larval survival and the occurrence of lipid droplets in the hepatopancreas. Larval survival differed significantly depending on the starvation and feeding treatment administered. A high percentage of survival was found for the starvation treatment until day 1 (S1-PNR), for the feeding treatment until day 4 (F4-PRS), and for the continuously fed control groups (FC). Survival was minimal for the starvation treatment lasting until day 7 (S7-PNR) and for the continuously starved control groups (SC). In turn, similar tendencies were observed in the utilizati...

Benthesicymus tanneri Faxon, 1893 (Benthesicymidae) is a poorly known benthopelagic shrimp dominant in the lower oxygen minimum zone (OMZ) boundary in the Mexican Pacific. Its bathymetric distribution and diet were studied off the Mexican Pacific continental slope at depths of 710-2309 m, and the potential environmental drivers were analyzed. A total of 187 specimens were collected between 772 and 2010 m, although most were found between 1008 and 1620 m. This represents a wide bathymetric distribution compared to other species inhabiting lower OMZ boundaries. The size of individuals (carapace length, CL) ranged from 11.2 to 53.3 mm with no clear bathymetric patterns in the size distribution of the species. The sex ratio (males:females, M:F) changed with depth from M:F = 1:1 at 700-1000 m to M:F = 1:5 at 1300-1600 m. The main prey of B. tanneri in all the samples analyzed was the pelagic red crab Pleuroncodes planipes (Munididae Ahyong, Baba, Macpherson and Poore, 2010), and secondary preys were benthopelagic and bathypelagic fishes and shrimp-like decapod crustaceans. Only 15% of the stomachs were empty. Specimens of P. planipes captured simultaneously to B. tanneri were measured as an indicator of the size of available prey and 90% of individuals measured 11.1-14.8 mm CL. Benthesicymus tanneri was collected within wide ranges of values of the different environmental variables considered, and statistical analyses did not provide solid relationships between the patterns of distribution and the environmental factors (Spearman R and Generalized Linear Models). We hypothesize that B. tanneri is a eurytopic species whose swimming capacity allows for temporal vertical migrations into the water column.