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Indoseges malkangiri sp. nov. Choudhury, Siliwal, Das & Giroti urn:lsid:zoobank.org:act: 5EB57046-CF2F-4E1E-890A-2E259273866A (Fig. 1–5) Type specimens: INDIA. holotype ♂, 25.v.2017, near Malkangiri town, Malkangiri district, Odisha (18° 21’ 46.3”N, 81° 54’ 43.8”E, elev. 235m), coll. S. R. Choudhury and N. Panda, IPU-17-ARA-554; paratypes 1 ♂ same data as holotype, IPU-17-ARA-555, 2 ♂ 08.vi.2018, same locality as holotype, coll. S. R. Choudhury and N. Panda IPU-18-ARA-1272, IPU-18-ARA-1275, 2 ♀ same data as holotype, IPU-17-ARA-557, IPU-17-ARA-558, 3 ♀ 08.vi.2018, same locality as holotype, coll. S. R. Choudhury and N. Panda, IPU-18-ARA-1274, IPU-18-ARA-1276, IPU-18-ARA-1277. Diagnosis: Males of I. malkangiri differs from I. sushildutta by having thorn-like macrosetae on the ventral side of the distal half of metatarsi I (in I. sushildutta cuspule-like macrosetae present) (Fig. 2 A,B); tibia Iwith a row of short macrosetae on the retrolateral side (in I. sushildutta on the ventro-retrolateral side) (Fig. 2 B, 7 A) and lacks any apophysis (in I. sushildutta, tibiae Iwith distinct pointed basal apophysis) (Fig. 2 A–C, 7 A–C); femur Iwith a cluster of stridulatory macrosetae but without any tubercle-like apophysis (in I. sushildutta, prominent tubercle-like femoral apophysis present covered with a cluster of stridulatory spines on the distal face) (Fig. 2 A–D, 7 A–C); leg formula 2143 (in I. sushildutta leg formula in male 1243); palpal tibiae distinctly incrassate and embolus at the base twists 90° along with distal bulb (in I. sushildutta, slightly incrassate and embolus at the base twists 110°) (Fig. 3 A–D, 8 A–D). Females of I. malkangiri differs from all other congers by having two prolateral macrosetae on metatarsi II (in all other species one prolateral macroseta), and a distinct internal genitalia: anterior receptaculum hornlike with a small spherical base and pointed apex; ventral lobe with many elongated entapophyses; uterus externus weakly sclerotized and transparent; interpulmonary fold narrow, curved and strongly sclerotized forming a very conspicuous and well developed median flap; posterior receptaculum pear shaped (Fig. 5 A–E). Females also differ from rest of the species except I. satkosia by having three ventral macrosetae on tibiae IV (in all other species one ventral macroseta) and from I. sushildutta having leg formula 1423 (in I. sushildutta leg formula in female 1243). Etymology: The species epithet is a noun in apposition, referring to the type locality, Malkangiri in Odisha. Description of holotype male (IPU-17-ARA-554) (Fig. 1–3). Total length 7.50; carapace 3.89 long, 2.58 wide; abdomen 3.61 long, 2.28 wide; carapace covered with long and short brown hairs on caput and posterior margins; clypeus 0.25 high; eyes posterior row straight (Fig. 1 D); ocular group 0.27 long, 0.78 wide; eye diameter ALE 0.14, PME 0.14, PLE 0.14; inter-distances PLE-PME 0.13, ALE-ALE 0.28; abdomen ventrally pale greyish mottled with pale dots; chelicerae retrolaterally with two blunt tubercles at base; labium 0.90 long, 0.51 wide; endites 1.41 long, 0.58 wide; sternum 2.25 long, 1.45 wide, anteriorly marked by thick pale band (Fig. 1 B); legs metatarsi Iin ventral distal half with a thorn-like macroseta; tibiae Iwith a row of short macrosetae on retrolateral side (Fig. 2 B) and lacks any apophysis (Fig. 2 A–C); femur Iwith a cluster of stridulatory macrosetae and lacks prominent tuberclelike apophysis (Fig. 2 A–D); leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 3.00, 1.12, 2.61, 2.55, 1.31, 10.59; leg II: 3.21, 1.09, 3.86, 2.78, 1.27, 12.21; leg III: 2.36, 0.86, 1.51, 2.14, 0.82, 7.69; leg IV: 2.98, 1.18, 2.56, 2.51, 1.01, 10.24; palp: 1.25, 0.58, 0.95, -, 0.71, 3.49; leg formula 2143; spines or macrosetae: leg I: fep 16, tip 1-1-1-1, r 1-1-1-1, vp 1-1-1-1, vr 1-1-1-1-1-1-1, mtv 2-0-2; leg II: fep 1-1, tip 1-1-1, r 1-1-1-1, vp 0-0-1, vr 1-1-1, mtvp 1-0-1, vr 1-1-1; leg III: fep 1, tip 1-1-1, r 1-0-1, v 2-1-1-2, mtp 1-0-1, r 1-1-1, v 1-1-3; leg IV: fe d 1-1, ti v 1-1-2, mt vp 1-1-1-2, vr 0-0-0, preening comb with four ventro-retrolateral macrosetae on metatarsi IV; palp: no spine; teeth on paired claws of legs: I: 10, II: 8, III: 7, IV: 6; palp brownish-black; patella and tibia distinctly incrassate; cymbium; bulb pear shaped; embolic duct distinct; embolus at the base twists 90° along with distal bulb; embolus long, tubular, tapers and gradually bends dorsally, and spatulated distally with embolic opening on one side (Fig. 3 A–D). Remaining characters same as generic character. Variation in males [n=4; measurements: range (mean±standard deviation)]. Total length 6.88–7.50 (7.26±0.28); carapace. 3.32–3.89 (3.63±0.24) long, 2.09–2.58 (2.28±0.22) wide; abdomen 3.51–3.83 (3.63±0.14) long, 2.01–2.31 (2.21±0.14) wide; clypeus 0.18–0.28 (0.23±0.05) high; ocular group 0.25–0.31 (0.29±0.02) long, 0.61–0.78 (0.69±0.07) wide; eye diameter ALE 0.12–0.19 (0.15±0.03), PME 0.12–0.15 (0.14±0.01), PLE 0.12–0.19 (0.15±0.03); inter-distances PLE-PME 0.08–0.15 (0.12±0.03), ALE-ALE 0.25–0.28 (0.26±0.01); labium 0.63–0.90 (0.78±0.13) long, 0.44–0.51 (0.48±0.04) wide; endites 1.16–1.41 (1.29±0.12) long, 0.43–0.58 (0.51±0.07) wide; sternum 2.00–2.25 (2.13±0.11) long, 1.22–1.45 (1.33±0.12) wide; leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.42–3.00 (2.77±0.25), 0.77–1.18 (1.00±0.19), 2.12–2.61 (2.45±0.23), 2.02–2.55 (2.37±0.24), 1.10–1.34 (1.25±0.11), 8.43–10.59 (9.84±0.98); leg II: 2.62–3.21 (2.95±0.25), 1.01–1.19 (1.10±0.07), 2.43–3.86 (2.43±0.62), 2.61–2.88 (2.77±0.11), 1.19–1.34 (1.26±0.07), 9.86–12.21 (11.05±0.98); leg III: 2.02–2.36 (2.21±0.14), 0.83–0.87 (0.85±0.02), 1.24–1.51 (1.41±0.13), 1.80–2.14 (2.00±0.14), 0.81–0.88 (0.83±0.03), 6.70–7.69 (7.30±0.43); leg IV: 2.55–2.98 (2.97±0.01), 1.04–1.25 (1.22±0.05), 2.06–2.56 (2.43±0.19), 2.18–2.62 (2.57±0.08), 0.79–1.01 (0.96±0.08), 8.62–10.24 (9.61±0.72); palp: 1.07–1.25 (1.14±0.08), 0.54–0.58 (0.56±0.02), 0.87–0.95 (0.92±0.03), -, 0.60–0.71 (0.67±0.05), 3.15–3.49 (3.28±0.15). Description of paratype female (IPU-18-ARA-1274) (Fig. 4, 5). Total length 10.96; carapace.4.55 long, 2.75 wide; abdomen 6.41 long, 3.62 wide; carapace covered with long and short brown hairs, relatively more on caput; clypeus 0.30 high; eyes posterior row straight (Fig. 4 D); ocular group 0.29 long, 0.88 wide; eye diameter ALE 0.18, PME 0.15, PLE 0.18; inter-distances PLE-PME 0.18, ALE-ALE 0.46; abdomen ventrally pale greyish mottled with pale dots; labium 0.77 long, 0.58 wide; endites 1.45 long, 0.67 wide; sternum 2.64 long, 1.66 wide, anteriorly marked by a thick pale band (Fig. 4 B); leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.87, 1.23, 2.10, 1.91, 0.99, 9.10; leg II: 2.74, 1.21, 2.14, 1.95, 1.00, 9.04; leg III: 2.17, 1.00, 1.21, 1.54, 0.72, 6.64; leg IV: 2.88, 1.31, 2.23, 1.93, 0.72, 9.08; palp: 1.10, 0.65, 0.59, -, 0.92, 3.26; leg formula 1423; macrosetae: leg I: fep 1, tip 1-1-1, v 2-2-2, mtvp 1-0-1, vr 1-1-1; leg II: fep 1, tip 1-1-1, vp 1-0-1, vr 0-0-1, mtp 1-1-0, v 2-1-1-2; leg III: ti p 1-1, v 1-2, r 1-1, mt p 1-1-1-1, r 1-1-1-1, v 1-1-1-3; leg IV: ti vp 1-1, vr 0-1, mt vp 1-1- 2, vr 0-0-0, preening comb with four ventro-retrolateral macrosetae on metatarsi IV; palp: ti p 1-1, ta p 13; teeth on paired claws of legs: I: 15, II: 13, III: 11, IV: 9; female genitalia distinct; internal genitalia with a horn-like anterior receptaculum having small spherical base and pointed apex; dorsal lobe spherical; ventral lobe with many elongated entapophyses; uterus externus weakly sclerotized and transparent; interpulmonary fold narrow, curved and strongly sclerotized forming a very conspicuous and well developed median flap; pear shaped posterior receptaculum (Fig. 5 A–E). Remaining characters same as generic character. Variation in females [n=5, measurements: range (mean±standard deviation)]. Total length 8.61–12.80 (10.57±1.61); carapace. 3.69–4.55 (4.17±0.31) long, 2.5–2.75 (2.57±0.13) wide; abdomen 4.92–8.58 (6.40±1.43) long, 2.93–3.62 (3.29±0.26) wide; clypeus 0.24–0.40 (0.32±0.08) high; ocular group 0.25–0.34 (0.30±0.03) long, 0.79–0.94 (0.83±0.10) wide; eye diameter ALE 0.14–0.18 (0.15±0.02), PME 0.13–0.18 (0.15±0.02), PLE 0.14–0.18 (0.15±0.02), inter-distances PLE-PME 0.12–0.18 (0.16±0.03), ALE-ALE 0.36–0.46 (0.39±0.04); labium 0.72–0.78 (0.74±0.03) long, 0.54–0.59 (0.57±0.02) wide; endites 1.26–1.45 (1.35±0.08) long, 0.53–0.67 (0.61±0.05) wide; sternum 2.27–2.64 (2.42±0.16) long, 1.44–1.69 (1.55±0.12) wide; leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.56–2.92 (2.75±0.14), 1.08–1.23 (1.15±0.06), 1.94–2.19 (2.08±0.10), 1.79–2.03 (1.94±0.09), 0.97–1.04 (0.99±0.03), 8.85–9.30 (8.92±0.36); leg II: 2.34–2.81 (2.65±0.19), 1.17–1.27 (1.22±0.04), 1.95–2.15 (2.131±0.11), 1.85–2.08 (2.00±0.10), 0.96–1.02 (0.97±0.05), 9.03–9.37 (8.98±0.42); leg III: 1.91–2.22 (2.08±0.12), 0.98–1.02 (0.98±0.06), 1.07–1.22 (1.17±0.06), 1.38–1.54 (1.49±0.07), 0.65–0.73 (0.69±0.03), 6.00–6.72 (6.41±0.30); leg IV: 2.66–2.97 (2.82±0.12), 1.28–1.31 (1.31±0.05), 2.02–2.34 (2.20±0.12), 1.76–1.93 (1.87±0.09), 0.66–0.77 (0.71±0.05), 8.38–9.44 (8.91±0.41); palp: 0.89–1.10 (1.04±0.09), 0.56–0.65 (0.60±0.04), 0.53–0.59 (0.56±0.03), -, 0.78–1.01 (0.90±0.09), 2.76–3.26 (3.09±0.21); teeth on paired claws of legs: I: 14–15, II: 12–13., Published as part of Choudhury, Sudhir Ranjan, Siliwal, Manju, Das, Sanjay Keshari & Giroti, André Marsola, 2021, Description of a new genus and five new species of tube-dwelling spider family Segestriidae (Araneae: Synspermiata) from Odisha, India, pp. 91-114 in Zootaxa 4963 (1) on pages 94-98, DOI: 10.11646/zootaxa.4963.1.4, http://zenodo.org/record/4719875

Indoseges gen. nov. Siliwal, Das, Choudhury & Giroti urn:lsid:zoobank.org:act: 4A00F387-0EBB-4B58-A2DA-66056B230B2F Diagnosis: Indoseges gen. nov. resembles Ariadninae genera, but differs from Segestriinae genera Gippsicola Hogg, 1900 and Segestria Latreille, 1804 by having labium narrowed distally (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B), posterior eyes in a straight line or slightly recurved (Fig. 1 D, 4 D, 6 D, 9 D, 11 D, 13 D, 15 C), lateral basal transverse ridge present on chelicerae, and chelicerae with three promarginal and one retromarginal teeth (Fig. 6 E, 11 E, 13 E, 15 D) (Beatty, 1970; Grismado, 2008; Ramírez, 2014; Giroti & Brescovit, 2015,2017,2018; Marsh et al. 2018; Fomichev & Marusik, 2020). Among Ariadninae, it differs from both Ariadna and Citharoceps by having: male tarsi I–II incrassate and with ventral scopulae (Fig. 2 F,G), presence of 4–5 ventral spines on metatarsi Iof males, and female femur I–II with one macrosetae. Additional characters that separates it from Ariadna: labrum as long as labium and distally with a row of dorsal median microsetae (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B), but in Ariadna labrum longer than the labium and without dorsal median microsetae; males lack apophysis on metatarsi I (Fig. 2 A,B), but in Ariadna apophysis may or may not present on metatarsi Iof males; males with a cluster of stridulatory macrosetae on femur I, which could be on tubercle-like apophysis (Fig. 2 A–D, 7 A–C), but in Ariadna a cluster of stridulatory macrosetae may or may not present on femur Iof males and apophysis absent; female palp tarsi with more than ten macrosetae (Fig. 4 F, 9 F, 11 G, 13 G, 15 E), but in Ariadna number of macrosetae five or more; and presence of conspicuous median flap in female genitalia (Fig. 5 C,E, 10 C,E, 12 B,D, 14 B,D, 16 B,D), but absent in Ariadna. Additional characters that separates it from Citharoceps: stridulatory apparatus in the cephalic area absent, but present in Citharoceps; a stridulatory thorn in the prolateral region of femur I absent, but present in Citharoceps; presence of tubular invaginations on posterior receptaculum in females (Fig. 5 B–E, 10 B–E, 12 A–C, 14 A–C, 16 A–D), but absent in Citharoceps; and labium-sternum junction length is greater than the endite-sternum junction; but in Citharoceps labium-sternum junction is equal or smaller than the length of endite-sternum junction (Beatty, 1970; Grismado, 2008; Ramírez, 2014; Giroti & Brescovit, 2015, 2018; Siliwal et al. 2017; Marsh et al. 2018). Description (Fig. 1–17): Colouration: Spider in life blackish-brown with glossy integument (17 A,B), overall males darker than females. In ethanol, carapace greenish-brown (thoracic area) to brownish-black (cephalic area) (Fig. 1 A, 4 A, 6 A, 9 A, 11 A, 13 A, 15 A); median eyes translucent and lateral eyes pale, all eyes with black rim (Fig. 4 D, 6D, 9D); legs and palp orangish-green except brownish-black femora and greenish-brown tibia, few small black patches on patella and tibia (Fig. 1 A, 3, 4 A, 6 A, 8, 11 A, 13 A, 15 A), ventrally pale greenish-brown (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B); abdomen dorsally greyish-brown with few pale patches (Fig. 1 A, 4 A, 6 A, 9 A, 11 A, 13 A, 15 A), ventrally pale greyish mottled with pale dots or without any pattern, two orange spots and black patches on epigastric area (Fig. 5 A, 10 A); labium orangish-brown, lighter anteriorly (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B); endites orangish-brown except for white proximal end (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B); sternum orangish-brown with faint black patches laterally and medially (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B); chelicerae brownish-black (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B). Morphometry and setae (male, female): Total length 6.82–7.50 (5.09–12.80), carapace 3.32–3.89 long, 2.09–2.58 wide (2.48–4.89 long, 0.99–2.82 wide), abdomen 3.50–3.83 long, 2.00–2.31 wide (2.61–8.58 long, 1.67–4.33 wide). Carapace: longer than broad, narrowed anteriorly; cephalic area higher than thoracic area; integument rough, covered with long and short brown hairs; caput slightly raised; thoracic fovea indistinct (Fig. 1 A, 4 A, 6 A, 9 A, 11 A, 13 A, 15 A). Eyes: six, grouped in three pairs, anterior median eyes absent, lateral eyes placed on a single tubercle, posterior row straight or slightly recurved (Fig. 1 D, 4 D, 6 D, 9 D, 11 D, 13 D, 15 C). Chelicerae: conical with rough integument due to files or hairs; having distinct retrolateral basal transverse ridge; covered with stiff hairs with tuberculated base except for posterior and basal lateral sides; prominent depression on the posterior distal region to fit distal part of endites; fangs short, shaft with an internal serrula and about 2.5 times longer than wide, with three promarginal teeth and one retromarginal tooth (Fig. 6 E, 11 E, 13 E, 15 D). Labium: longer than wide, narrowed down in anterior one-third, separated from sternum by partially membranous suture, covered with few long and short black hairs (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B). Labrum: well developed and is about length of the labium (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B), distal end having a row of median microsetae. Endites: broader at the base, narrowed medially and rounded proximally, covered with long black hairs (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B), dorso-distally depressed to fit cheliceral distal end, serrula with a single row of fine minute teeth forming a ridge-like structure. Sternum: longer than wide, margins with precoxal triangles, concave anteriorly, rebordered and not fused with carapace or pedicel, covered with long black hairs (Fig. 1 B, 4 B, 6 B, 9 B, 11 B, 13 B, 15 B). Abdomen: longer than wide, uniformly hairy (Fig. 1 A, 4 A, 6 A, 9 A, 11 A, 13 A, 15 A), coated with short setae, and scattered long setae among them; book lung and tracheal opening weakly sclerotized (Fig. 5 A, 10 A). Spinnerets: three pairs, covered with brown hairs; anterior lateral spinnerets with three segments, the basal segment crossed by a diagonal membranous stripe, colulus distinct, short and covered with long hairs (Fig. 1 C, 4 C, 6 C, 9 C, 11 C, 13 C). Legs: robust, prograde, with third pair directed forward; each leg with three tarsal claws, two paired claws with long dentitions (Fig. 4 E, 9 E, 11 F, 13 F), teeth largest on leg I, unpaired claw with one small tooth (Fig. 4 E, 9 E, 11 F, 13 F), true claw tufts absent; leg pairs I–II with more setae and macrosetae than pairs III–IV; metatarsi and tarsi IV with ventral brush of thickened and serrated setae and metatarsi IV with preening comb on distal ventro or ventro-retrolateral (Fig.7 D); trichoboth- ria on dorsal subdistal region of metatarsi I–IV and dorsal basal half of tibia I–IV; male tarsi I–II incrassate and with ventral scopulae or tenant setae (Fig. 2 F,G); in males femur, tibiae and metatarsi of all legs with macrosetae; male metatarsi Ilacks any apophysis (Fig. 2 A,B) and with thorn-like or cuspule-like macrosetae on ventral side of distal half; males with or without distinct pointed basal tibial apophysis on prolateral side of tibiae I (Fig. 2 A–C, Fig. 7 A–C), male tibiae Ialso with a row of short macrosetae on retrolateral side or ventro-retrolateral side (Fig. 2 B, 7 A); males with a cluster of stridulatory macrosetae on femur I, that could be on tubercle-like apophysis (Fig. 2 A–D, 7 A–C); in females tarsi I–II with ventro-prolateral lines of thickened tactile setae, interspersed with lines of chemosensory setae; females tibiae and metatarsi of all legs with macrosetae, but only ventro-prolateral, ventroretrolateral, and sometimes prolateral and retrolateral; female femur I–II with one macroseta. Leg formula in male 1243 or 2143 and female 1243 or 1423. Palp: tibiae of male palp incrassate/swollen basally slightly to distinctly, longer than cymbium, with one dorsal trichobothrium and without any macrosetae; cymbium with distal notch dividing it into two unequal short processes, prolateral portion slightly longer than retrolateral one and without any scopulae or sensory setae; bulb pear-shaped, abruptly narrowed in mid-portion between bulb and embolus, embolus long, tubular, tapers and gradually bends dorsally, twists at the base 90° or 110° along with distal bulb and spatulated distally with an embolic opening on one side; spermatic duct broad, emerging at the base of bulb, coiling gradually towards mid-portion and enters embolus (Fig. 3 A–D, 8 A–D); female palp short and robust, with one smooth claw, turned inward almost 90°; macrosetae present on prolateral sides of tibiae and tarsi, tarsi with more than ten macrosetae (Fig. 4 F, 9 F, 11 G, 13 G, 15 E); tibiae with a single dorsal trichobothrium. Female genitalia: epigynal plate distinct and sclerotized; internal genitalia composed by anterior receptaculum, uterus externus, interpulmonary fold and posterior receptaculum; anterior receptaculum divided into dorsal and ventral lobe; dorsal lobe small, weakly sclerotized and transparent; ventral lobe strongly sclerotized and with multiple elongated entapophyses; glandular duct plate sclerotized and located in central area at the junction of both lobes; uterus externus indistinct or weakly sclerotized and transparent; interpulmonary fold strongly sclerotized forming a median flap; posterior receptaculum sac-like or shape variable, and with small tubular invaginations (Fig. 5 A–E, 10 A–E, 12 A–D, 14 A–D, 16 A–D). Etymology: The name is a combination of two words, ‘Indo’ and ‘seges’, Indo, relates to India from where the new genus is discovered and seges, refers to ‘Segestriidae’, the family name to which the new genus belongs. Type species: Indoseges malkangiri sp. nov., based on male and female specimens deposited at Indraprastha University Museum (IPUM), New Delhi. Distribution: Odisha, India, Published as part of Choudhury, Sudhir Ranjan, Siliwal, Manju, Das, Sanjay Keshari & Giroti, André Marsola, 2021, Description of a new genus and five new species of tube-dwelling spider family Segestriidae (Araneae: Synspermiata) from Odisha, India, pp. 91-114 in Zootaxa 4963 (1) on pages 92-94, DOI: 10.11646/zootaxa.4963.1.4, http://zenodo.org/record/4719875, {"references":["Beatty, J. (1970) The spider genus Ariadna in the Americas (Araneae, Dysderidae). Bulletin of the Museum of Comparative Zoology, 139 (8), 433 - 518.","Grismado, C. J. (2008) A taxonomic revision of the spider genus Ariadna Audouin, 1826 in Argentina and Chile, with the description of five new species (Arachnida, Araneae, Segestriidae). Zoosystema, 30, 333 - 360.","Ramirez, M. J. (2014) The morphology and phylogeny of dionychan spiders (Araneae: Araneomorphae). Bulletin of the American Museum of Natural History, (390), 1 - 374. https: // doi. org / 10.1206 / 821.1","Marsh, J. R., Baehr, B. C., Glatz, R. V. & Framenau, V. W. (2018) New species of tube web spiders of the genus Ariadna from South Australia (Araneae, Segestriidae). Evolutionary Systematics, 2, 137 - 149. https: // doi. org / 10.3897 / evolsyst. 2.29172","Fomichev, A. A. & Marusik, Y. M. (2020) Notes on the spider genus Segestria Latreille, 1804 (Araneae: Segestriidae) in the East Palaearctic with description of three new species. Zootaxa, 4758 (2), 330 - 346. https: // doi. org / 10.11646 / zootaxa. 4758.2.7","Giroti, A. M. & Brescovit, A. D. (2015) Revalidation of the spider genus Citharoceps Chamberlin, 1924 (Araneae, Segestriidae). ZooKeys, 495, 1 - 19. https: // doi. org / 10.3897 / zookeys. 495.8950","Giroti, A. M. & Brescovit, A. D. (2018) The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae). Zootaxa, 4400 (1), 1 - 114. [& Erratum: vol. 4438 (no. 3): 600] https: // doi. org / 10.11646 / zootaxa. 4400.1.1","Siliwal, M., Yadav, A. & Kumar, D. (2017) Three new species of tube-dwelling spider genus Ariadna Audouin, 1826 (Araneae: Segestriidae) from India. Zootaxa, 4362 (3), 433 - 441. https: // doi. org / 10.11646 / zootaxa. 4362.3.7"]}

Indoseges sushildutta sp. nov. Siliwal, Das, Choudhury, & Giroti urn:lsid:zoobank.org:act: 333AD004-862B-4F37-B27D-121C3E12AAFD (Fig. 6–10) Type specimens: INDIA- holotype ♂, 25.v.2017, Govindpali ghati, Malkangiri district, Odisha (18° 36’ 34.3”N, 82° 18’ 12.3”E, elev. 248m), coll. S. R. Choudhury and N. Panda, IPU-17-ARA-560; paratypes 1 ♂ 08.vi.2018, same locality as holotype, coll. S. R. Choudhury and N. Panda, IPU-18-ARA-1286, 4 ♀ same data as holotype, IPU- 17-ARA-548, IPU-17-ARA-549, IPU-17-ARA-550, IPU-17-ARA-559, 3 ♀ 08.vi.2018, same locality as holotype, coll. S. R. Choudhury and N. Panda, IPU-18-ARA-1281, IPU-18-ARA-1287, IPU-18-ARA-1290. Diagnosis: Males of I. sushildutta differs from I. malkangiri by having capsule-like macrosetae on the ventral side of the distal half of metatarsi I (in I. malkangiri thorn-like macrosetae present); tibiae Iwith a row of short macrosetae on the ventro-retrolateral side (in I. malkangiri on the retrolateral side) (Fig. 2 B, 7 A) and a distinct pointed prolateral basal apophysis (in I. malkangiri, tibiae Ilacks any apophysis) (Fig. 2 A–C, 7 A–C); femur Iwith a distinct triangular tubercle-like prolateral femoral apophysis covered by a cluster of stridulatory macrosetae on the distal face (in I. malkangiri, femur Iwith a cluster of stridulatory macrosetae and lacks any apophysis) (Fig. 2 A–D, 7 A–C); leg formula 1243 (in I. malkangiri leg formula in male 2143); palpal tibiae slightly incrassate and embolus at the base twists 110° along with distal bulb (in I. malkangiri, distinctly incrassate and embolus at the base twists 90°) (Fig. 3 A–D, 8 A–D). Females of I. sushildutta differs from all other congers by having leg formula of 1243 (in all other species it is 1423), four ventral macrosetae on metatarsi I (in all other species five ventral macrosetae), and a distinct internal genitalia: anterior receptaculum horn-like with a broad, elongated base and gradually tapered apex; ventral lobe with few shallow entapophyses; uterus externus weakly sclerotized and transparent; interpulmonary fold wide, nearly straight, strongly sclerotized forming a conspicuous, but short median flap; posterior receptaculum with irregular edges (Fig. 10 A–E). Etymology: The species epithet is a noun in apposition, in honor of renowned herpetologist, Prof. Sushil Kumar Dutta for encouraging and supporting our studies on spiders in Odisha. Description of holotype male (IPU-17-ARA-560) (Fig. 6–8). Total length 7.37; carapace.3.87 long, 2.54 wide; abdomen 3.50 long, 3.20 wide; clypeus 0.23 high; ocular group 0.31 long, 0.81 wide; eye diameter ALE 0.17, PME 0.17, PLE 0.17; inter-distances PLE-PME 0.11, ALE-ALE 0.33; chelicerae retrolaterally with one blunt tubercle at base; labium 0.82 long, 0.53 wide; endites 1.44 long, 0.52 wide; sternum 2.30 long, 1.44 wide; metatarsi Iwith a single row of small cuspule like ventral macrosetae on distal half; tibiae Iwith a row of short macrosetae on ventro-retrolateral side (Fig. 7 A), and a distinct pointed basal prolateral apophysis (Fig. 7 A–C); femur Iwith a distinct triangular tubercle-like prolateral femoral apophysis covered by a cluster of stridulatory spines on distal face (Fig. 7 A–C); leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.93, 1.00, 3.40, 2.64, 1.34, 11.31; leg II: 2.85, 1.11, 2.73, 2.56, 1.18, 10.43; leg III: 2.14, 0.87, 1.37, 1.74, 0.88, 7.00; leg IV: 2.70, 1.22, 2.29, 1.24, 0.75, 9.20; palp: 1.10, 0.52, 0.81, -, 0.65, 3.08; Leg formula 1243; macrosetae: leg I: fe p 1-1, v 23, tip 1-1-1, r 1-1-1-1-1-1, vp 1-1, vr 1-1-1-1-1-1-1-1-1-1-1-1, mtvp 1-1-1, vr 1-0-1; leg II: fep 1, v 1, ti p 1-1-1, r 1-1-1, vp 1, vr 1-1-1-1-1-1-1-1-1-1, mtp 1,vp 1, vr 1-1-1-1-1; leg III: fep 1, tid 2-2, vp 0-0-1, vr 1-1-1, mt d 2-2, vp 0-0-2, vr 1-1-1; leg IV: fe d 1-1, ti vp 1-1-1, vr 0-0-1 mt vp 1-0-1, vr 0-0-0, preening comb with four ventro-retrolateral macrosetae on metatarsi IV (Fig. 7 D); palp: no spine; teeth on paired claws of legs: I: 12, II: 11, III: 8, IV: 8. Palp patella and tibia slightly incrassate; embolus at the base twists 110° along with distal bulb (Fig. 8 A-D). Rest of the characters same as in the male of I. malkangiri. Variation in males [n=2; measurements: range]. Total length 7.09–7.37; carapace 3.41–3.87 long, 2.29–2.54 wide; abdomen 3.50–3.68 long, 2.00–3.20 wide; clypeus height 0.18–0.23; ocular group 0.30–0.31 long, 0.73– 0.81 wide; eye diameter ALE 0.12–0.17, PME 0.15–0.17, PLE 0.16–0.17; inter-distances PLE-PME 0.10–0.11, ALE-ALE 0.30–0.33; labium: 0.66–0.82 long, 0.43–0.53 wide; endites: 1.20–1.44 long, 0.46–0.52 wide; sternum: 2.00–2.30 long, 1.32–1.44 wide; leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.71–2.93, 0.89–1.00, 2.99–3.40, 2.26–2.64, 1.20–1.34, 10.05–11.31; leg II: 2.61–2.85, 0.98–1.11, 2.44–2.73, 2.27–2.56, 1.18–1.22, 9.42–10.43; leg III: 1.91–2.14, 0.82–0.87, 1.19–1.37, 1.63–1.74, 0.67–0.88, 6.22–7.00; leg IV: 2.48–2.70, 1.02–1.22, 2.02–2.29, 1.24–2.06, 0.74–0.75, 8.32–9.20; palp: 1.09–1.10, 0.50–0.52, 0.68–0.81, -, 0.55–0.65, 2.82–3.08. Description of paratype female (IPU-17-ARA-550) (Fig. 9, 10). Total length 10.21; carapace.4.51 long, 2.81 wide; abdomen 5.70 long, 3.37 wide; carapace posterior border slightly concave, covered with few short hairs expect for long hairs in ocular area and few on caput; clypeus 0.30 high; eyes posterior row slightly recurved (Fig. 9 D); ocular group 0.28 long, 0.87 wide; eye diameter ALE 0.15, PME 0.15, PLE 0.16; inter-distances PLE-PME 0.15, ALE-ALE 0. 44; labium 0.81 long, 0.62 wide; endites 1.42 long, 0.62 wide; sternum 2.58 long, 1.64 wide; leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.89, 1.16, 2.31, 2.03, 0.96, 9.35; leg II: 2.80, 1.25, 2.25, 2.01, 0.95, 9.26; leg III: 2.18, 0.95, 1.16, 1.57, 0.67, 6.53; leg IV: 2.95, 1.28, 2.31, 1.98, 0.66, 9.18; palp: 1.08, 0.63, 0.53, -, 0.88, 3.12; leg formula 1243; macrosetae: leg I: fep 1, tip 1-1-1, v 2-2-2, mt v 0-2-2; leg II: fep 1, tip 0-1-1, vp 0-0-0, vr 0-0-1, mtp 1, vp 0-0-1, vr 1-0-1; leg III: tip 1-1-0, r 1-1-1, vp 0-0-0, vr 0-0-1, mt d 2-2, vp 0-0-2, vr 1-1-1; leg IV: ti vp 0-0-0, vr 0-0-1, mt vp 1-1-2, vr 0-0-0, preening comb with four ventro-retrolateral macrosetae on metatarsi IV; palp: ti p 1-2-2, ta p 15; teeth on paired claws of legs: I: 17, II: 14, III: 9, IV: 9; female genitalia distinct; internal genitalia with a horn-like anterior receptaculum having broad, elongated base and gradually tapered apex; dorsal lobe spherical; ventral lobe with few shallow entapophyses; uterus externus weakly sclerotized and transparent; interpulmonary fold wide, nearly straight, strongly sclerotized forming a conspicuous, but short median flap; posterior receptaculum with irregular edges (Fig. 10 A–E). Remaining characters same as I. malkangiri female. Variation in females [n=7, measurements: range (mean±standard deviation)]. Total length 6.69–12.25 (9.72±1.52); carapace. 3.92–4.89 (4.36±0.28) long, 2.38–2.82 (2.63±0.16) wide; abdomen 4.88–7.36 (5.75±0.74) long, 2.47–4.33 (3.36±0.52) wide; clypeus 0.28–0.35 (0.31±0.02) high; ocular group 0.28–0.55 (0.34±0.09) long, 0.80–0.90 (0.85±0.04) wide; eye diameter ALE 0.15–0.17 (0.16±0.01), PME 0.13–0.15 (0.15±0.01), PLE 0.15–0.18 (0.16±0.01), inter-distances PLE-PME 0.10–0.17 (0.14±0.03), ALE-ALE 0.35–0.55 (0.41±0.06); labium 0.72–0.87 (0.80±0.06) long, 0.51–0.62 (0.59±0.04) wide; endites 1.32–1.58 (1.43±0.09) long, 0.49–0.65 (0.58±0.05) wide; Sternum 2.24–2.70 (2.49±0.14) long, 1.36–1.64 (1.55±0.09) wide; leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.51–3.31 (2.88±0.22), 1.08–1.40 (1.20±0.10), 2.07–2.39 (2.25±0.09), 1.83–2.18 (1.99±0.10), 0.93–1.14 (1.02±0.10), 8.42–10.26 (9.34±0.50); leg II: 2.31–3.10 (2.69±0.22), 1.09–1.44 (1.23±0.10), 1.93–2.40 (2.17±0.14), 1.79–2.23 (1.98±0.13), 0.91–1.02 (0.98±0.04), 8.04–10.17 (9.05±0.59); leg III: 1.94–2.31 (2.13±0.11), 0.94–1.07 (0.98±0.05), 1.09–1.34 (1.20±0.09), 1.31–1.72 (1.51±0.12), 0.59–0.71 (0.66±0.04), 5.92–7.15 (6.48±0.34); leg IV: 2.61–3.28 (2.88±0.19), 1.17–1.45 (1.29±0.08), 2.04–2.46 (2.25±0.12), 1.70–2.16 (1.89±0.14), 0.66–0.83 (0.72±0.05), 8.25–10.18 (9.04±0.54); palp: 0.09–1.17 (1.05±0.08), 0.63–0.69 (0.65±0.02), 0.47–0.64 (0.53±0.05), -, 0.81–0.99 (0.91±0.08), 2.82–3.48 (3.14±0.21); preening comb with 3–4 ventro-retrolateral macrosetae on metatarsi IV; teeth on paired claws of all legs 9–17., Published as part of Choudhury, Sudhir Ranjan, Siliwal, Manju, Das, Sanjay Keshari & Giroti, André Marsola, 2021, Description of a new genus and five new species of tube-dwelling spider family Segestriidae (Araneae: Synspermiata) from Odisha, India, pp. 91-114 in Zootaxa 4963 (1) on pages 99-103, DOI: 10.11646/zootaxa.4963.1.4, http://zenodo.org/record/4719875

Indoseges narayani sp. nov. Choudhury, Siliwal, Das & Giroti urn:lsid:zoobank.org:act: 3DC6F099-4A3B-4296-81FA-EF6C3A8DA732 (Fig. 13, 14, 17A) Type specimens: INDIA. holotype ♀, 14.x.2017, Narayani, Ganjam district, Odisha (19° 41’ 52.3”N, 85° 09’ 13.5”E, elev. 138m), coll. S. R. Choudhury and N. Panda, IPU-17-ARA-952; paratypes 2 ♀ same data as holotype, IPU-17-ARA-927, IPU-17-ARA-928, same data as holotype. Diagnosis: Females of I. narayani differs from all other congers by having distinct internal genitalia; anterior receptaculum screw-like having a broad base; ventral lobe with many elongated entapophyses; uterus externus weakly sclerotized and transparent; interpulmonary fold wide and strongly sclerotized forming a very conspicuous and well developed median flap, with prominent lateral extensions and having ‘nearly V-shaped’ inner margins; pos- terior receptaculum globular (Fig. 14 A–D). Females also differ from rest of species except I. chilika by having two ventral macrosetae on metatarsi IV (four in I. malkangiri and I. sushildutta, five in I. satkosia) and from I. chilika in absence of dorsal macrosetae on tibiae III (four in I. chilika). Etymology: The species epithet is a noun in apposition, referring to the type locality Narayani. Description of holotype female (IPU-17-ARA-952) (Fig. 13, 14, 17A). Total length 7.35; carapace.3.38 long, 2.10 wide; abdomen 3.97 long, 2.50 wide; carapace anteriorly darker, covered with long and short brown hairs, relatively more on caput; clypeus 0.26 high; ocular group 0.25 long, 0.74 wide; eye diameter ALE 0.13, PME 0.13, PLE 0.13; inter-distances PLE-PME 0.15, ALE-ALE 0.35; abdomen ventrally pale greyish without any pattern; labium 0.60 long, 0.48 wide; endites 1.06 long, 0.46 wide; sternum 1.91 long, 1.26 wide, anterior end darkish without any distinct band (Fig. 13 B); leg measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.00, 0.92, 1.75, 1.61, 0.83,7.11; leg II: 1.96, 0.91, 1.60, 1.53, 0.75, 6.75; leg III: 1.54, 0.77, 0.97, 1.15, 0.51, 4.94; leg IV: 2.12, 1.02, 1.68, 1.37, 0.57, 6.76; palp: 0.71, 0.43, 0.45, -, 0.66, 2.25; leg formula:1423; macrosetae: leg I: fep 1, tip 1- 1-1, v 2-2-2, mtvp 1-0-1, vr 1-1-1; leg II: fep 1, tip 1-1-1, vp 0-0-1, vr 1-0-1, mtp 1, vp 1-0-1, vr 1-1-1; leg III: ti p 1-1-0, r 1-1-0, vp 0-0-0, vr 0-0-1, mt d 2-2, vp 0-0-1,vr 0-1-1; leg IV: ti vp 0-0-0, vr 0-0-1, mt vp 0-1-1, vr 0-0-0, preening comb with four ventro-retrolateral macrosetae on metatarsi IV; palp: ti p 2-2, ta p 17; teeth on paired claws of legs: I: 18, II: 15, III: 12, IV: 10; Female genitalia distinct; internal genitalia with a screw-like anterior receptaculum having broad base, dorsal lobe spherical, ventral lobe with many elongated entapophyses; uterus externus weakly sclerotized and transparent; interpulmonary fold wide and strongly sclerotized forming a very conspicuous and well developed median flap, with prominent lateral extensions having ‘nearly V-shaped’ inner margins; posterior receptaculum globular (Fig. 14 A–D). Remaining characters same as I. malkangiri female. Variation in females [n=3, measurements: range (mean±standard deviation)]. Total length 5.09–7.35 (6.13±1.14). Carapace. 2.48–3.38 (2.80±0.51) long, 0.99–1.26 (1.79±0.27) wide; abdomen 2.61–3.97 (3.34±0.68) long, 1.67–2.50 (2.06±0.42) wide. ocular group 0.20–0.25 (0.23±0.03) long, 0.58–0.74 (0.66±0.08) wide; eye diameter ALE 0.11–0.13 (0.12±0.01), PME 0.12–0.13 (0.12±0.01), PLE 0.12–0.13 (0.12±0.01), inter-distances PLE- PME 0.08–0.15 (0.09±0.05), ALE-ALE 0.22–0.35 (0.27±0.07); clypeus 0.20–0.26 (0.22±0.03) high. Labium 0.46– 0.6 (0.51±0.08) long, 0.35–0.48 (0.40±0.07) wide, Endites 0.8–1.06 (0.90±0.14) long, 0.33–0.46 (0.38±0.07) wide, Sternum 1.47–1.91 (1.63±0.24) long, 0.99–1.26 (1.09±0.15) wide. Leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): Leg I: 1.71–2.00 (1.81±0.17), 0.72–0.92 (0.81±0.10), 1.32–1.75 (1.46±0.25), 1.23–1.61 (1.38±0.20), 0.65–0.83 (0.72±0.10), 5.63–7.11 (6.18±0.81); Leg II: 1.53–1.96 (1.71±0.22), 0.75–0.91 (0.81±0.09), 1.18–1.60 (1.33±0.23), 1.20–1.53 (1.32±0.18), 0.59–0.75 (0.65±0.09), 5.26–6.75 (5.83±0.81); Leg III: 1.28–1.54 (1.37±0.15), 0.59–0.77 (0.68±0.09), 0.70–0.97 (0.80±0.15), 0.92–1.15 (1.03±0.12), 0.41–0.51 (0.44±0.06), 3.91–4.94 (4.32±0.55); Leg IV: 1.72–2.12 (1.85±0.23), 0.81–1.02 (0.88±0.12, 1.34–1.68 (1.47±0.18), 1.12–1.37 (1.22±0.13), 0.45–0.57 (0.50±0.06, 5.44–6.76 (5.93±0.73); Palp: 0.62–0.71 (0.66±0.05), 0.40–0.43 (0.41±0.02), 0.32–0.45 (0.08±0.32), -, 0.55–0.66 (0.59±0.06), 1.89–2.25 (2.02±0.20); preening comb with 3–4 ventroretrolateral macrosetae on metatarsi IV.

Indosegeschilika sp. nov. Siliwal, Das, Choudhury & Giroti urn:lsid:zoobank.org:act: 444BC9A6-7775-4023-8F8D-76B106163CEF (Fig. 11, 12) Type specimens: INDIA. holotype ♀, 14.x.2017, Barkud Island, Chilika lake, Ganjam district, Odisha (19° 33’ 22.6”N, 85° 08’ 47.8”E, elev. 05m), coll. S. R. Choudhury and N. Panda, IPU-17-ARA-945; paratypes 3 ♀ same data as holotype, IPU-17-ARA-946, IPU-17-ARA-956, IPU-17-ARA-957. Diagnosis: Females of I. chilika differs from all other congers by having two prolateral macrosetae on tibiae I (in all other species three prolateral macrosetae), four dorsal macrosetae on tibiae III (in all other species dorsal macrosetae absent on tibiae III), and a distinct internal genitalia: anterior receptaculum horn-like with a broad, elongated base and pointed apex; ventral lobe with few shallow entapophyses; uterus externus weakly sclerotized and transparent; interpulmonary fold very wide and eye-like, strongly sclerotized forming a very conspicuous and well developed median flap, with prominent lateral extensions having ‘clear V-shaped’ inner margins; posterior receptaculum oval (Fig. 12 A–D). Etymology: The species epithet is a noun in apposition, referring to the Chilika lake, where the type locality, Barkud Island is located. Description of holotype female (IPU-17-ARA-945) (Fig. 11, 12). Total length 6.25; carapace.3.10 long, 1.94 wide; abdomen 3.15 long, 2.13 wide; carapace covered with long and short brown hairs, relatively more on caput; clypeus 0.29 high; ocular group 0.20 long, 0.74 wide; eye diameter ALE 0.12, PME 0.12, PLE 0.13; inter-distances PLE-PME 0.13, ALE-ALE 0.32; abdomen ventrally pale greyish without any pattern; labium 0.60 long, 0.43 wide; endites 1.14 long, 0.45 wide; sternum 1.84 long, 1.23 wide; leg measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.13, 0.91, 1.66, 1.59, 0.75,7.04; leg II: 1.99, 0.90, 1.53, 1.46, 0.63, 6.51; leg III: 1.52, 0.67, 0.98, 1.19, 0.48, 4.84; leg IV: 2.08, 0.92, 1.70, 1.40, 0.52, 6.62; palp: 0.82, 0.52, 0.41, -, 0.71, 2.46; leg formula 1423; macrosetae: leg I: fep 1, tip 1-1, v 2-2-2, mtvp 1-0-1, vr 1-1-1; leg II: fep 1, tip 1-1, vp 0-0-1, vr 1-0-1, mt p 1, vp 0-0-1, vr 1-1-1; leg III: ti d 2-2, vp 0-0-0, vr 0-0-1, mt d 2-2, vp 0-0-1,vr 1-1-1; leg IV: ti vp 0-0-0, vr 0-0- 1, mt vp 1-0-1, vr 0-0-0, preening comb with four ventro-retrolateral macrosetae on metatarsi IV; palp: ti p 2-2-2, ta p 12; teeth on paired claws of legs: I: 20, II: 16, III: 10, IV: 9; female genitalia distinct; external genitalia in the form of sclerotized plate; internal genitalia with a horn-like anterior receptaculum having broad, elongated base and pointed apex; dorsal lobe spherical; ventral lobe with few shallow entapophyses; uterus externus weakly sclerotized and transparent; interpulmonary fold very wide and eye-like, strongly sclerotized forming a very conspicuous and well developed median flap, with prominent lateral extensions having ‘clear V-shaped’ inner margins; posterior receptaculum oval (Fig. 12 A–D). Remaining characters same as I. malkangiri female. Variation in females [n=4, measurements: range (mean±standard deviation)]. Total length 6.25–6.84 (6.50±0.26), carapace. 2.60–3.37 (2.92±0.38) long, 1.65–2.22 (1.88±0.26) wide; abdomen 3.15–3.94 (3.58±0.35) long, 2.13–2.32 (2.23±0.08) wide; clypeus 0.24–0.29 (0.28±0.02) high; ocular group 0.20–0.25 (0.24±0.03) long, 0.62–0.77 (0.70±0.07) wide; eye diameter ALE 0.12–0.13 (0.12±0.01), PME 0.12–0.13 (0.12±0.01), PLE 0.12–0.13 (0.12±0.01), inter-distances PLE-PME 0.08–0.13 (0.10±0.02), ALE-ALE 0.26–0.32 (0.30±0.03); labium 0.45–0.61 (0.54±0.08) long, 0.37–0.49 (0.42±0.05) wide, endites 0.84–1.14 (0.99±0.15) long, 0.35–0.45 (0.41±0.05) wide; sternum 1.50–2.02 (1.72±0.25) long, 1.01–1.35 (1.16±0.16) wide; leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 1.68–2.28 (1.97±0.29), 0.68–0.98 (0.82±0.15), 1.30–1.66 (1.52±0.21), 1.21–1.62 (1.42±0.21), 0.64–0.80 (0.72±0.07), 5.51–7.04 (6.44±0.92); leg II: 1.54–2.01 (1.80±0.24), 0.66–0.98 (0.82±0.14), 1.18–1.60 (1.39±0.21), 1.18–1.52 (1.34±0.17), 0.57–0.72 (0.64±0.06), 5.13–6.83 (5.98±0.82); leg III: 1.24–1.65 (1.43±0.19), 0.59–0.74 (0.66±0.06), 0.67–0.98 (0.81±0.14), 0.85–1.23 (1.05±0.19), 0.46–0.51 (0.47±0.03), 3.78–4.99 (4.42±0.59); leg IV: 1.70–2.31 (1.96±0.29), 0.80–1.10 (0.92±0.13), 1.34–1.70 (1.56±0.22), 1.11–1.51 (1.29±0.19), 0.45–0.58 (0.51±0.06), 5.42–6.62 (6.23±0.88); palp: 0.61–0.82 (0.71±0.10), 0.35–0.52 (0.45±0.08), 0.32–0.43 (0.37±0.06), -, 0.52–0.71 (0.63±0.10), 1.85–2.46 (2.16±0.33).

Introduction Haematospermia is an uncommon clinical condition that may be associated with prostate cancer. The optimal investigation of haematospermia is unknown. The aim of this study was to investigate haematospermia as a presenting symptom of significant pathology and to assess the diagnostic value of magnetic resonance imaging (MRI). Material and methods Patient and treatment parameters were collected from a practice cohort of men referred to a urology center presenting with haematospermia. We used a multivariate logistic regression model to test the independent significance of MRI in detecting prostate cancer (PCa) after adjusting for other known predictors of PCa detection. Results A total of 125 men (median age 58 years) were evaluated between 2012–2015. In the univariate and multivariate logistic regression model MRI was a significant predictor of PCa diagnosis after adjusting for age, prostate specific antigen (PSA) and digital rectal examination (DRE) results (Odds Ratio (OR) 14.15, p = 0.001). Of 107 patients who underwent MRI prostate imaging, 31 (28.9%) had reports suspicious of PCa. In 26 patients, other benign conditions were detected on MRI. PCa was detected in 12 (25.5%) of the 47 men (median age 61 years; range 43 to 85) who underwent prostate biopsies. Eight (17%) of these patients had Gleason ≥7 grade cancer. The persistence of haematospermia was not an independent predictor of cancer diagnosis (OR 0.20, p = 0.15). Conclusions PCa is not commonly associated with haematospermia. MRI seems to be improving detection rate of a significant PCa, particularly in patients presenting with haematospermia and normal PSA levels and DRE examination. Duration of haematospermia does not predict the presence of PCa.