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Glyptothorax viridis, new species (Figs. 1–2) Type material. Holotype: ZSI FF 9463, 87 mm SL; India: Manipur, Chandel District, Dujang River at Dutuwl below Khubung Khullen, a tributary of the Chakpi River, Chindwin basin, 24º07ꞌ32.39ꞌꞌ N 93º53ꞌ04.49ꞌꞌ E, Shangningam, 23 December 2021. Paratypes: ZSI FF 9464, 4 ex, 74.0– 87.2 mm SL; same data as holotype. Diagnosis. Glyptothorax viridis is distinguished from all congeners in the Chindwin drainage in having plicae on ventral surface of pectoral-fin spine, and on first pelvic-fin ray, and thoracic adhesive apparatus with deep cone-shape median depression opening caudally. It is further distinguished by having the following combination of characters: thoracic adhesive apparatus with anteromedial striae; slender nasal barbel reaching anterior orbital margin; strong dorsal spine; branched pectoral-fin rays 9 with 9–10 serrae on posterior margin of pectoral spine, and slender pelvic fin reaching anal fin. Glyptothorax viridis is distinguished from all congeners in the Chindwin-Irrawaddy drainage, except G. trilineatus and G. ventrolineatus in having three stripes on the body. However, it can be distinguished from G. ventrolineatus and G. trilineatus (Fig. 3) in having an oval field thoracic adhesive apparatus with deep cone shaped median depression (vs. elliptical thoracic adhesive apparatus with triangular shaped median depression in G. ventrolineatus; vs. rhomboidal thoracic adhesive apparatus with narrow median depression in G. trilineatus). Furthermore, it differs from G. ventrolineatus in having greater head width (19.2–21.8 % SL vs. 12.3–14.5), longer anal fin (19.2–22.7 % SL vs.13.8–15.8), greater head depth at occiput (54.1–63.6 % HL vs. 39.5–46.3), dorsal spine not serrated (vs. serrated), dorsal fin nearer to adipose-fin origin than to tip of snout (vs. dorsal fin located midway between tip of snout and adipose-fin origin) and fewer unbranched anal-fin rays (ii vs. iii); and from G. trilineatus in having a slender nasal barbel reaching (vs. not reaching) anterior margin of orbit, maxillary barbel reaching beyond posterior end of pectoral-fin base (vs. reaching anterior base of pectoral fin), shorter preanal length (64.4–67.9 % SL vs. 68.2–68.4), and presence (vs. absence) of tubercles on fins. Description. Morphometric data in Table 1. Body slender. Head depressed with truncate snout when viewed dorsally and ventrally. Dorsal profile rising from tip of snout to dorsal-fin origin, then sloping towards end of caudal peduncle. Skin on body with tuberculations. Occipital process not in contact with anterior nuchal plate element. Anterior nuchal plate element visible as a saddle with arrow-shaped extensions when viewed dorsally. Ventral profile flat up to vent, slightly convex to end of anal-fin base, then decreasing gently towards caudal-fin base. Caudal peduncle elongate. Eyes small, round, situated on dorsal surface of head. Mouth inferior, premaxillary tooth band partially exposed with mouth closed. Oral teeth small, villiform, in irregular rows on all tooth-bearing surfaces. Barbels in four pairs. Maxillary barbel slender, extending to end of pectoral-fin base. Outer mandibular barbel longer than inner, reaching pectoral-fin base. Nasal barbel long, extending to anterior margin of orbit when adpressed. Thoracic adhesive apparatus present, longer than broad, consisting of ridges of striae in an oval field extending from isthmus to level towards middle of pectoral-fin base and with deep, cone-shaped median depression opening caudally. Median ridges oriented longitudinally, lateral ones radiating from median depression, few branched at anterior and posterior ends. Anteromedial striae present. Ridges of apparatus not reaching gular region. Anus and urogenital openings located at vertical through posterior mid of adpressed pelvic fin. Lateral line complete, running mid-lateral. Dorsal fin with i, 6 (5) rays; fin margin convex, located nearer to adipose-fin origin than to tip of snout. Dorsal-fin spine strong, shorter than depth of body. Adipose fin with anterior margin straight or very slightly concave, posterior margin angular. Pectoral fin with i,9 (5) rays; posterior-fin margin almost convex. Pectoral spine broad, covered with thick skin, its posterior margin with 9 (2) or 10 (3) serrae. Pelvic fin with i,5 (5) rays, its posterior margin slightly convex, surpasses vent, tip of adpressed fin reaching anal-fin origin. Ventral surface of pectoral-fin spine plaited, and first pelvic-fin ray plaited with rows of plicae. Anal fin with ii, 9 (5) rays. Caudal fin with 8+7 (5) branched rays, strongly forked, with lower lobe slightly longer than upper lobe. Coloration. In 70 % alcohol: dorsal and lateral surface of head and body brownish-black, ventral surface up to pelvic-fin pale yellow. Three yellow stripes on body: first one, thick and mid-dorsal, extending behind end of dorsal fin; second thin, midlateral, originating at level of origin of pectoral fin; and third thick, originating from end of pelvic fin, with stripes reaching caudal-fin base. Dorsal, pectoral, pelvic and anal-fins with two black bands, first thin band at base, and broad one at middle of the fin, margins whitish-yellow. Adipose fin yellow, with broad black band in middle. Caudal fin brownish yellow with black rays. Nasal barbel pale brown. Maxillary barbel with broad black base, and mandibular barbel pale yellow. In life, body uniformly green (Fig. 4). Stripes distinct yellow. Fins tinged yellowish-orange and caudal fin yellowish-brown. Distribution. The species is presently known only from the type locality, the Dujang, a hillstream tributary of Chakpi River, Chindwin River basin in Manipur, India (Fig. 5). Habitat. Glyptothorax viridis was collected in rapids with cobbles, boulders and rocks as substrate. The fish was collected along with species of the genus Schistura, Mustura, Psilorhynchus, Garra and Mastacembelus. Etymology. The species name ‘ viridis’ is derived from Latin meaning green, alluding to the color pattern of live individuals., Published as part of Shangningam, Bungdon & Kosygin, Laishram, 2023, Glyptothorax viridis, a new species of catfish (Teleostei: Siluriformes: Sisoridae) from Manipur, India, pp. 83-93 in Zootaxa 5315 (1) on pages 86-89, DOI: 10.11646/zootaxa.5315.1.6, http://zenodo.org/record/8130253

Shangningam, Bungdon, Kosygin, Laishram (2023): Glyptothorax viridis, a new species of catfish (Teleostei: Siluriformes: Sisoridae) from Manipur, India. Zootaxa 5315 (1): 83-93, DOI: 10.11646/zootaxa.5315.1.6, URL: http://dx.doi.org/10.1094/PDIS-04-22-0755-PDN

Glyptothorax yuensis, new species, is described from the Yu River, Sagaing division, Myanmar. It is characteristic in having a shallow adipose fin acutely incised at the posterior extremity of its base with an elongated pointed tip, adipose-fin base length 7.6–10.0 % SL; short nasal barbel, not extending to anterior margin of orbit; thoracic adhesive apparatus present with a conical-shaped median depression opening caudally, its length 11.7–13.0% SL and width 8.2–10.1% SL, anteromedial striae present; deep caudal peduncle, its depth 9.4–11.0 % SL; and two thin yellowish stripes on the body. A key to the species of the genus of Chindwin drainage is provided.

Exostoma dhritiae, new species (Fig. 1) Type materials. Holotype. ZSI FF 9119, 52.8 mm SL, India: Arunachal Pradesh: Upper Siang District: Siking stream a tributary of Siang River near Yingkiong (Brahmaputra River drainage), 28° 39' N; 95° 0' E, L Kosygin et al., 21 Nov 2021. Paratypes. ZSI FF 9120, 6, 46.3-51 mm SL, same data as holotype. Diagnosis. Exostoma dhritiae is distinguished from congeners in having a combination of the following characters: the presence of conical tubercles on the dorsal surface of the head, paired fin rays and anterior margin of dorsal fin spine; adipose-fin base distinctly separate from upper procurrent caudal-fin rays, its posterior extremity distinctly incised (dorsoposterior margin sharply angular); anterolateral surfaces of the lip with 3 to 4 parallel anastomosing plicae followed by numerous irregular rounded plaques; body depth at anus 13.4−17.6 % SL; adipose fin base length 23.1−34.3 % SL; caudal-peduncle length 16.5−21.0 % SL; caudal-peduncle depth 6.6−9.3% SL; tip of maxillary barbel reaching to base of fifth pectoral-fin ray; nasal barbel extending to posterior margin of eye; 10−11 branched pectoral-fin rays. Description. Biometric data are in Table 1. Head and body broad, strongly depressed. Rostral margin slightly truncate dorsally. Dorsal profile rising gently from internarial region to base of dorsal fin then elevating gently towards adipose fin, and sloping ventrally to base of caudal fin. Ventral profile flat to anal-fin base, then sloping gently dorsally to base of caudal fin. Mid-lateral region from pectoral-fin base to anal-fin base slightly depressed with swollen muscular margins. Anus and urogenital openings located midway between posterior end of pelvic fin and anal-fin origin. ......Continued on the next page Mouth inferior with broad, fleshy, papillate lips. Tooth patches on both jaws separated in midline. Most of premaxillary tooth patches exposed in closed mouth. Teeth in jaws distally flattened, oar-shaped deeply embedded in the skin. Teeth on lower jaw situated in two well-separated, roughly triangular patches. Palate edentulous. Lower lip with prominent labial fold, notched at insertions of inner mandibular barbels (Fig. 2). Barbels four pairs, maxillary barbel dorso-ventrally flattened, with broad base and pointed tip extending to base of the fifth pectoral-fin ray, its ventral surface with adhesive pad consisting of 10−15 elongate plicae followed by series of small, roundedplicae. Nasal barbel long extending to posterior margin of eye, basally wide, dermal flap slender. Inner mandibular barbel short, originating at labial flap, originating from notch between median and lateral lobes of lower lip; outer mandibular barbel slightly flattened with pointed tip, not reaching to the pectoral fin origin. Maxillary and nasal barbel with numerous prominent conical tubercles. Anterolateral surfaces of lip with 3 to 4 parallel anastomosing plicae followed by numerous irregular rounded plaques (Fig. 2). Eyes small, dorso-laterally situated, subcutaneous. Gill openings narrow, extending from base of first pectoral-fin ray to above dorsal much higher than the level of last pectoral-fin base. Dorsal and lateral side of head with numerous backwardly pointed conical tubercles (Fig. 3). Dorsal fin with i, 5 (1) or 6* (7) rays. Adipose-fin base long; its posterior margin distinctly separate from upper procurrent rays of caudal fin, and distinctly incised with the dorsoposterior margin sharply angular (Fig. 4). Pectoral fin enlarged, without spine and with i,10 (5) or i,11 (2) rays; first ray greatly flattened, with numerous parallel striae on ventral surface, dorsal surface of fin with tubercles. Pelvic fin enlarged, with convex distal margin and i,5 (7) rays; first ray greatly flattened, with numerous parallel striae on ventral surface, its tip reaching anus when adpressed; dorsal surfaces of fin with tubercles. Anal fin with i,4 (3) or i, 5 (4) rays, dorsal surface of fin with tubercles. Caudal fin deeply emarginated with i,6,7,i (2) or i,8, 7, i*(5) rays, lower lobe slightly longer. Vertebrae 39. Coloration. In 70 % ethanol, the dorsolateral surfaces of the head and body are brown, with pale cream on the ventral surfaces and the dorsal surface of the head with a distinct dark blotch near the occiput. The distal half of dorsal, pectoral, pelvic and anal fins hyaline, yellowish brown basally.Adipose fin yellowish, distally lighter. Caudal fin hyaline medially, pale brown basally and distally. Maxillary and nasal barbels are brownish and creamish-grey ventrally. Distribution and habitat. Exostoma dhritiae is known only from the type locality Siking stream, a tributary of Siang River near Yingkiong (Brahmaputra River drainage), Upper Siang District, Arunachal Pradesh, India (Fig. 5 & 6). The Siking stream is shallow, cold and swiftly flowing, with a substrate of cobbles and pebbles. The associated species include Garra spp., Glyptothorax spp., Pseudecheneis spp., Schistura spp., and Schizothorax spp. Etymology. The new species is named after Dr Dhriti Banerjee, Director of the Zoological Survey of India, to honour her contribution to knowledge of the fauna of India.

Glyptothorax yuensis, new species (Figs. 1–2) Type material. Holotype: ZSI FF 9015, 79.0 mm SL; Myanmar: Sagaing division, Tamu District, Yu River at Tamu, a tributary of Chindwin River, Chindwin-Irrawaddy drainage 24°13’37’’N 94°19’06’’E, Shangningam, 28 December 2018. Paratypes: ZSI FF 9016–9017, 2, 61.3–87 mm SL; same data as holotype. Diagnosis. Glyptothorax yuensis can be distinguished from all congeners in the Chindwin drainage in having the posterior insertion of the adipose fin is at a point two-thirds (vs. seven-eighths or more) along the entire length of the fin and in having (vs. lacking) anteromedial striae in the thoracic adhesive apparatus. Further, it is distinguished from all congeners in the Chindwin drainage except G. rugimentum and G. minutus in having a shorter adipose-fin base (7.6–10.0 % SL vs. 11.0–18.5). It differs from G. rugimentum in the absence (vs. presence) of light and dark vertical bands on the caudal peduncle and from G. minutus in having a shorter (vs. longer) nasal barbel not reaching (vs. reaching) anterior margin of the orbit. Details of differential diagnosis are provided in the discussion section. Description. Morphometric data in Table 1. Body slender. Head depressed with almost rounded snout when viewed dorsally and ventrally. Dorsal profile rising gently from tip of snout to dorsal-fin origin, then sloping gently towards end of caudal peduncle. Occipital process not in contact with anterior nuchal plate element. Anterior nuchal plate element visible as a saddle with arrow-shaped extensions when viewed dorsally. Ventral profile flat up to vent, slightly convex to end of anal-fin base, then decreasing gently towards caudal-fin base. Caudal peduncle elongate. Eyes small, round, situated on dorsal surface of head. Mouth inferior, premaxillary tooth band partially exposed with mouth closed. Oral teeth small, villiform, in irregular rows on all tooth bearing surfaces. Barbels in four pairs. Maxillary barbel slender, extending middle of pectoral-fin base. Outer mandibular barbel longer than inner, almost reaching pectoral-fin base. Nasal barbel short, not extending to anterior margin of orbit when adpressed, extending halfway to orbital margin. Thoracic adhesive apparatus present, longer than broad, consisting of ridges of striae in oval field extending from isthmus to level of middle of pectoral-fin base and with a conical-shaped median depression opening caudally (Fig. 2). Anteromedial striae present. Striae oriented anterodistally, radiating from median depression. Ridges of apparatus not reaching gular region. Anus and urogenital openings located at vertical through posterior mid of adpressed pelvic fin. Lateral line complete, running mid-lateral. Vertebrae 20+18= 38. First branchial arch bearing 2+9 gill rakers. Dorsal fin with i, 6 (3) rays; fin margin convex, located halfway between snout tip and adipose fin origin. Dorsal-fin spine strong, gently curved, with 5–6 serrae, longer than depth of body. Adipose fin shallow, acutely incised at the posterior extremity of its base with elongated posterior pointed tip (fig. 3). Pectoral fin with i,9 (2) or 10 rays; posterior fin margin almost straight. Pectoral spine very broad, covered with thick skin, its posterior margin with 12–13 serrae. Pelvic fin with i,5 (3) rays, its posterior margin slightly convex, surpasses the vent, tip of adpressed fin not reaching anal-fin origin. Anal fin with iv, 8 or 9 (2) rays, almost straight posterior margin. Caudal fin with 7+8 branched rays, strongly forked, with lower lobe slightly longer than upper lobe. Coloration. In 70 % alcohol: dorsal and lateral surface of head and body light brown, ventral surface up to anal-fin origin yellowish. Two yellowish thin stripes on body: a mid-dorsal one, extending behind occipital process and another midlateral, originating at level of origin of pectoral fin, both stripes reaching caudal-fin base. Dorsal, pectoral, pelvic and anal-fins with dark-brown bases, margins yellowish. Adipose fin yellowish, its distal margin dark brown. Caudal fin white. Nasal, maxillary barbels brown. Mandibular barbel yellowish. Distribution. The species is presently known only from the type locality, the Yu River, a tributary of Chindwin River, Sagaing Division, Myanmar (Fig. 4). Etymology. The species is named after its type locality, Yu River., Published as part of Shangningam, Bungdon & Kosygin, Laishram, 2022, Glyptothorax yuensis, a new species of sisorid catfish (Teleostei: Sisoridae) from Myanmar, pp. 118-128 in Zootaxa 5129 (1) on pages 119-121, DOI: 10.11646/zootaxa.5129.1.7, http://zenodo.org/record/6488283, {"references":["Arunkumar, L. & Moyon, W. A. (2017) Glyptothorax chavomensis sp. nov. (Teleostei: Sisoridae) with its congeners from Manipur, North-Eastern India. International Journal of Zoology Studies, 2 (5), 242 - 254.","Ferraris, C. J. & Britz, R. (2005) A diminutive new species of Glyptothorax (Siluriformes: Sisoridae) from the upper Irrawaddy River basin, Myanmar, with comments on sisorid and erethistid phylogenetic relationships. Ichthyological Exploration of Freshwaters, 16,375 - 383.","Ng, H. H. & Kottelat, M (2008) Glyptothorax rugimentum, a new species of catfish from Myanmar and Western Thailand (Teleostei: Sisoridae). The Raffles Bulletin of Zoology, 56 (1), 129 - 134."]}

Key to the species of the genus Glyptothorax from the Chindwin drainage 1. Unculiferous ridges of the thoracic adhesive apparatus extending anteriorly onto the gular region........... G. rugimentum - Unculiferous ridges of the thoracic adhesive apparatus not extending anteriorly onto the gular region.................. 2 2. Thoracic adhesive apparatus with a deep ovoid pit................................................ G. burmanicus - Thoracic adhesive apparatus without a deep ovoid pit......................................................... 3 3. Thoracic adhesive apparatus almost enclosed posteriorly............................................. G. igniculus - Thoracic adhesive apparatus opens posteriorly.............................................................. 4 4. Adiposefin base 7.6–10.1 % SL with an elongated pointed posterior tip............................. G. yuensis sp nov - Adipose-fin base 11.1–18.5 % SL without an elongated pointed posterior tip...................................... 5 5. Nasal barbel not reaching anterior margin of orbit........................................................... 6 - Nasal barbel reaching anterior margin of orbit.............................................................. 7 6. Body depth at dorsal-fin origin 16.2–19.1% SL; adipose length 11.2–14.0%SL........................... G. ngapang - Body depth at dorsal-fin origin 22.2–22.3%SL; adipose length 15.6–6.3% SL......................... G. chavomensis 7. Body with a mid-ventral line............................................................... G. ventrolineatus - Body without a mid-ventral line......................................................................... 8 8. Dorsal spine smooth posteriorly; pectoral spine with 6 serrae.......................................... G. minutus - Dorsal spine serrated posteriorly; pectoral spine with 8–12 serrae............................................... 9 9. Body depth at dorsal-fin base 21.0–26.8% SL; presence of mid-dorsal stripe.......................... G. senapatiensis - Body depth at dorsal-fin base 18.6–9.7% SL; absence of mid-dorsal stripe................................ G. granulus, Published as part of Shangningam, Bungdon & Kosygin, Laishram, 2022, Glyptothorax yuensis, a new species of sisorid catfish (Teleostei: Sisoridae) from Myanmar, pp. 118-128 in Zootaxa 5129 (1) on page 127, DOI: 10.11646/zootaxa.5129.1.7, http://zenodo.org/record/6488283

Glyptothorax rupiri, new species (Fig. 1) urn:lsid:zoobank.org:act: 832DD37C-BFEB-4A77-9584-980B6E6D5F12 Type material. Holotype: ZSI FF 8542, 124 mm SL, India: Arunachal Pradesh: Upper Siang District: Jambung stream, a tributary of Siang River near Hawa Camp (Brahmaputra River basin), 28��41���9.2��� N; 94��58���8.82���E, 28 October 2017, collected by L Kosygin. Paratypes: ZSI FF 8543, 3 ex. 156 ���161 mm SL, same data as holotype. Diagnosis. Glyptothorax rupiri is distinguished from congeners in the Indian subcontinent in possessing the following combination of characters: the presence of plicae on the ventral surface of the pectoral-fin spine and first pelvic-fin ray; body depth at anus 11.2���13.4% SL; a posteriorly serrated dorsal-fin spine, its length 11.3���12.2% SL; a thoracic adhesive apparatus, longer than broad, with a V-shaped median depression which opens posteriorly; an arrowshaped anterior nuchal plate element; adipose-fin base length 10.9���12.6% SL; dorsal-to-adipose distance 26.1���27.8% SL; post-adipose distance 17.7���19.7% SL; caudal peduncle depth 6.4���7.5% SL; 14���18 serrae on posterior margin of the pectoral-fin spine; unculiferous ridges of adhesive apparatus not extending anteriorly onto gular region; nasal barbel not reaching anterior orbital margin; body with two longitudinal pale-cream stripes; densely tuberculated skin; and the presence of numerous tubercles on the dorsal surface of pectoral and pelvic-fin rays. Description. Morphometric data are presented in Table 1. Body elongate. Head depressed with almost rounded snout when viewed dorsally and ventrally. Dorsal profile rising evenly from tip of snout to origin of dorsal-fin, then sloping gently from there to end of caudal peduncle, with slight rising at adipose-fin origin. Occipital process not in contact with anterior nuchal plate element. Anterior nuchal plate element visible as a saddle with arrow-shaped extensions when viewed dorsally. Ventral profile flat up to origin of anal-fin base, then rising along anal-fin base, thereafter level up to end of caudal-fin base. Caudal peduncle shallow. Mouth inferior, lips papillate, teeth on upper jaw as one continuous band, its anterior margin almost truncate or slightly rounded; teeth on lower jaw in two patches, separated by a wide median partition. Eyes small, round, located on dorsal surface of head. Thoracic adhesive apparatus elliptical, longer than broad, extending from isthmus to slightly before posterior end of pectoralfin base, with an inverted V-shaped median depression on posterior half, opening caudally; ridges of apparatus not reaching gular region (Fig. 2). Anus and urogenital opening located at tip of adpressed pelvic fin. Skin on head and body densely tuberculated. Lateral line complete, mid-lateral. Vertebrae 21 + 20 = 41 or 21 + 21 = 42. Barbels in four pairs. Maxillary barbel long, slender, reaching middle of pectoral-fin base. Outer mandibular barbel longer than inner, almost reaching gill opening. Nasal barbel short, not reaching anterior margin of orbit when adpressed. Dorsal fin with i,6 (4) rays, its origin located slightly nearer adipose-fin origin than snout tip; dosal-fin spine strong, shorter than depth of body, anterior margin smooth, posterior margin with 9���11 serrae. Adipose-fin short, its origin slightly posterior to anal-fin origin, anterior margin straight, posterior margin slightly convex. Pectoral fin slightly shorter than head, with i,10 (3) or i,10,i (1) rays; its posterior margin almost straight or slightly concave. Pectoral-fin spine broad, long, its anterior margin smooth, posterior margin with 14���18 serrae. Pelvic fin with i,5 (4) rays, its tip not reaching origin of anal fin when adpressed. Ventral surface of pectoral-fin spine (Fig. 2) and first pelvic-fin ray plaited. Dorsal surface of pectoral and pelvic fins tuberculated (Fig. 3). Anal fin long, with ii,10 (4) rays; its origin slightly anterior to adipose fin origin. Caudal fin deeply forked, lower lobe slightly longer, with 8+9 (3) or 7+7 (1) rays. Coloration. In 70 % alcohol: Dorsal surface of the head and body dark brown, lateral surface dark brown fading to yellowish cream ventrally. Nuchal plate elements visible as a distinct, pale, arrow-shaped saddle overlying plate elements. Two pale creamish longitudinal stripes: one prominent, middorsal, originating from the occiput, other indistinct, midlateral, originating from eye, extending to caudal-fin base (Fig. 1). Dorsal-fin base black. Adipose fin dark brown with creamish posterior margin. Caudal, pectoral, pelvic and anal fins dusky. Distribution. The species is presently known only from the type locality, the Jambung stream, a tributary of the Siang River near Hawa Camp, Upper Siang District, Arunachal Pradesh (Brahmaputra River basin), India (Figs. 4 & 5). Etymology. The species is named after Rupir Boli of the Forest Department, Government of Arunachal Pradesh, for his help in collecting the specimens during the first author���s survey of Arunachal Pradesh., Published as part of Kosygin, Laishram, Singh, Pratima & Rath, Shibananda, 2021, A new species of Glyptothorax (Teleostei: Sisoridae) from the Brahmaputra River basin, Arunachal Pradesh, India, pp. 239-250 in Zootaxa 5023 (2) on pages 240-242, DOI: 10.11646/zootaxa.5023.2.4, http://zenodo.org/record/5225864

Nomenclature for the nameless is one of the successful events after the invention of the DNA barcoding technique in biodiversity research. The ornamental fish species are frequently hunted ...

Key to species of the genus Osteobrama 1. Barbels absent........................................................................................ 2 - Barbels present....................................................................................... 5 2. Lateral line scales 42���63, pre-dorsal scales 21���30........................................................... 3 - Lateral line scales 71���76, pre-dorsal scales 30���32.................................................. O. belangeri 3. Branched pectoral-fin rays 14���15, lateral-line scales 55���63.................................................... 4 - Branched pectoral-fin rays 12, lateral-line scales 42���53................................................ O. cunma 4. Lateral-line scales 55���60.................................................................... O. peninsularis - Lateral-line scales 62���63.......................................................................... O. cotio 5. Only maxillary barbels present........................................................................... 6 - Both rostral and maxillary barbels present.................................................................. 7 6. Branched anal-fin rays 16���18, lateral-line scales 68���70.................................................. O. dayi - Branched anal-fin rays 21���27, lateral-line scales 73���85................................................ O. vigorsii 7. Branched anal-fin rays 11���18............................................................................ 8 - Branched anal-fin rays 22���27............................................................................ 9 8. Pre-dorsal scales 15, lateral-line scales 44, branched anal-fin ray 11....................................... O. bakeri - Pre-dorsal scales 19���22, lateral-line scales 52���57, branched anal-fin rays 16���18.............................. O. neilli 9. Barbels prominent, pre-dorsal scales 34���38, branched pectoral-fin rays 14................................... O. feae - Barbels minute, pre-dorsal scales 29���32, branched pectoral-fin rays 15���16........................... O. tikarpadaensis, Published as part of Shangningam, Bungdon, Rath, Shibananda, Tudu, Asha Kiran & Kosygin, Laishram, 2020, A new species of Osteobrama (Teleostei: Cyprinidae) from the Mahanadi River, India with a note on the validity of O. dayi, pp. 68-76 in Zootaxa 4722 (1) on pages 68-76, DOI: 10.11646/zootaxa.4722.1.6, http://zenodo.org/record/3603710

Osteobrama tikarpadaensis, new species (Figure 1) Holotype. ZSI FF 7494, 129.0 mm SL; India: Odisha, Angul District, Mahanadi River at Marada, 3 km from Tikarpada, 20��35��N 84��47��E, L. Kosygin Singh, 8 June 2016. Paratypes. ZSI FF 7495, 5, 90.3���129.0 mm SL, same data as holotype. Diagnosis. Osteobrama tikarpadaensis, new species, can be distinguished from its congeners by the combination of the following characters: two pairs of minute barbels; dorsal fin with iii���iv simple and 8 branched rays, last unbranched ray stiff, serrated, with 25���33 serrae; pectoral fin with 15���16 branched rays; anal fin long, with 25���27 branched rays; predorsal scales 29���32, lateral line complete, with 59���71 scales; and an oblique black streak on anterior body immediately posterior to opercle, parallel to upper opercular margin. Description. Morphometric data are presented in Table 1. Body deep, laterally compressed. Dorsal profile sloping upward linearly to nape, then in a broad curve to dorsal-fin origin, forming a distinct hump, then sloping gradually downward towards caudal peduncle. Ventral profile strongly curved from tip of snout to origin of anal fin. Head compressed, longer than deep. Eyes large, slightly bulging, situated anteriorly on head, visible from dorsal and ventral sides. Interorbital space slightly arched. Mouth terminal, obliquely directed upwards. Gape of mouth almost reaching anterior margin of orbit. Barbels in two pairs (rostral and maxillary), minute (Fig. 2). Nostrils almost at level of upper margin of eye, distinctly nearer to anterior margin of eye than to tip of snout. Dorsal fin with iii (2) or iv (4) unbranched and 8 (6) branched rays, its base with 9 (1), 10 (3), 11(1) or 12(1) scales, slightly closer to tip of snout than to caudal-fin base; last unbranched ray stiff, serrated with 25 (2), 26 (1), 27 (1), 29 (1) or 33 (1) serrae; tip of first branched ray, when adpressed, nearly reaching level of posterior end of anal fin. Pectoral fin with 1 unbranched and 15(4)���16(2) branched rays, shorter than head length; first branched ray longest, extending past pelvic-fin base. Pelvic fin with 1 (6) unbranched and 9 (6) branched rays, closer to pectoral-fin origin than to anal-fin origin, shorter than head length; pelvic fin extending past anus, reaching one scale anterior to anal-fin origin when adpressed. Anal fin long, with iii (6) unbranched and 25 (2), 26 (3) or 27 (1) branched rays, its base with 23 (1), 26 (1), 27 (3) or 28 (1) scales, almost reaching caudal peduncle when adpressed. Anus located immediately anterior to anal-fin origin. Caudal fin deeply forked, with 9+8 branched rays. . Scales small. Circumpeduncular scales 26 (1), 27 (4) or 28 (1). Pre-dorsal scales 29 (1), 30 (1), 31 (3) or 32 (1). Pre-anal scales 33 (1), 36 (2), 37 (2) or 38 (1). Lateral transverse scale rows between dorsal-fin origin to lateral line 14 (2) or 15 (4); and transverse scale rows between lateral-line to pelvic fin 13 (1) or 14 (5). Lateral line complete with 59 (1), 60 (1), 64 (2) or 71 (2) scales. Total vertebrae 36���37, comprised of 18 (1) or 19 (1) abdominal and 18 (2) caudal vertebrae (Fig. 3). Coloration. In preserved specimens, dorsal and dorsolateral surfaces of head and body faint brown, lateral surfaces of body below lateral line greyish become lighter ventrally. Dorsal, pectoral and caudal fins light greyish. Pelvic and anal fins pale white. Upper margin of eye black; an oblique black streak on anterior body immediately posterior to opercle, parallel to upper opercular margin. Etymology. The species is named after its type locality, Tikarpada, Odisha State, India. Distribution. Osteobrama tikarpadaensis is presently known only from the type locality Mahanadi River at Marada, 3 km from Tikarpada, Odisha state, India (Figs. 4���5)., Published as part of Shangningam, Bungdon, Rath, Shibananda, Tudu, Asha Kiran & Kosygin, Laishram, 2020, A new species of Osteobrama (Teleostei: Cyprinidae) from the Mahanadi River, India with a note on the validity of O. dayi, pp. 68-76 in Zootaxa 4722 (1) on pages 68-76, DOI: 10.11646/zootaxa.4722.1.6, http://zenodo.org/record/3603710

Glyptothorax gopii, new species (Fig. 1) Type material. Holotype. ZSI FF 5007, 63.5 mm SL; India: Mizoram: Champhai district: Tuipui River near Champhai (Kaladan River drainage), 23°27’N 93°15’E; Santanu Mitra & party, September 24, 2013. Paratypes. ZSI FF 5008, 1, 61.6 mm SL; same data as holotype. ZSI FF 5009, 1, 57.0 mm SL; same data as holotype. Diagnosis. Glyptothorax gopii is distinguished from congeners in the Indian subcontinent by the combination of the following characters: an axe-shaped anterior nuchal plate element with extensive contact with the posterior nuchal plate (Fig. 2a); the presence of plicae on the ventral surface of the pectoral-fin spine and outer rays of pelvicfin rays (Figs. 3a, b); skin sparsely tuberculated; dorsal-fin spine length 16.3–17.8% SL; thoracic adhesive apparatus elliptical, with lanceolate median depression (Fig. 3c), its length 16.2–20.7 % SL; predorsal length 36.2–38.1 % SL; adipose-fin base length 16.5–18.1% SL; postadipose distance 16.2–17.4% SL; caudal peduncle depth 7.9–9.1 % SL; nasal barbel not reaching the anterior margin of the eye; the first branchial arch with 2–3 + 4–5 rakers; and body with two longitudinal pale-cream stripes, one each along mid-dorsal line and lateral line. Description. Morphometric data are presented in Table 1. Body elongate. Head depressed with almost truncate snout when viewed dorsally and ventrally. Dorsal profile rising evenly from tip of snout to origin of dorsal-fin, then sloping gently from there to end of caudal peduncle. Occipital process not in contact with anterior nuchal plate element. Anterior nuchal plate element visible as a saddle with axe-shaped extensions, extensively in contact with posterior nuchal plate element. Ventral profile flat up to posterior end of pectoral-fin base, then slightly convex to anterior margin of pelvic-fin base, thereafter rising gently to end of caudal-fin base. Caudal peduncle deep. Mouth inferior, lips papillate, teeth on upper jaw as one continuous band, its anterior margin almost truncate; teeth on lower jaw in two patches, separated by a wide partition. Eyes small, round, located on dorsal surface of head. Thoracic adhesive apparatus elliptical, longer than broad, extending from isthmus to posterior end of pectoral-fin base with lanceolate median depression, almost enclosed posteriorly by loosely packed dermal ridges (Fig. 3c). Anus and urogenital opening located at vertical through posterior half of adpressed pelvic-fin. Skin on head and body sparsely tuberculate. Lateral line complete, mid-lateral. First branchial arch bearing 2+4 (2) or 3+5 (1) rakers. Total vertebrae 35 comprised of 18 abdominal and 17 post-abdominal vertebrae. Barbels in four pairs. Maxillary barbel long, slender, reaching middle of pectoral-fin base. Outer mandibular barbel longer than inner, not reaching gill opening. Nasal barbel short, not reaching anterior margin of orbit when adpressed, extending halfway to orbital margin. Dorsal fin located halfway between snout tip and adipose-fin origin, with i,6 (3) rays. Dorsal-fin spine strong, gently curved, with slightly rough surface posteriorly, shorter than depth of body at dorsal-fin origin. Adipose-fin short, anterior margin straight, posterior margin slightly convex. Pectoral-fin longer than head, with i,8 (2) or i,9,i (1) rays; posterior margin slightly concave. Pectoral-fin spine broad, anterior margin smooth, posterior margin with 13–14 serrae. Pelvic fin with i,5 (3) rays, not reaching the origin of anal-fin when adpressed. Ventral surface of pectoral-fin spine and simple and adjacent branched ray of pelvic-fin pleated (Figs. 3a, b). Anal fin long, with ii,8,i (2) or ii,9 (1) rays, its origin slightly posterior to adipose-fin origin. Caudal fin forked, with i,9,8,i (3) rays. Coloration. In 70 % alcohol: Dorsal surface of head and body dark brown, lateral surface yellowish-light brown fading to yellowish cream ventrally. Nuchal plate elements visible as a distinct pale axe-shaped saddle overlying plate elements (Fig. 2a). Two prominent pale creamish longitudinal stripes: one mid-dorsal, originating from occiput, and another mid-lateral originating from eye, extending to caudal-fin base (Fig. 1). Dorsal fin proximally blackish brown at base, distally hyaline. Adipose fin creamish yellow, with a broad dark-brown band at middle. Caudal-fin dusky with two black blotches at base, margins hyaline. Pectoral-fin spine dorsally dusky, pelvic and anal fins uniformly cream. Distribution. The species is presently known only from the type locality, the Tuipui River near Champhai, Champhai District, Mizoram (Kaladan River drainage), India. Etymology. The species is named after K.C. Gopi (retired scientist) of the Zoological Survey of India, Kolkata, honouring his contribution to the Indian Ichthyology.

Kosygin, Laishram, Das, Ujjal, Singh, Pratima, Chowdhury, Basudhara Roy (2019): Glyptothorax gopii, a new species of catfish (Teleostei: Sisoridae) from Mizoram, north-eastern India. Zootaxa 4652 (3): 568-578, DOI: https://doi.org/10.11646/zootaxa.4652.3.12