Indoseges malkangiri, Choudhury & Siliwal & Das & Giroti, 2021

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, Zootaxa 4963 (1), pp. 91-114 : 94-98

publication ID	https://doi.org/ 10.11646/zootaxa.4963.1.4
publication LSID	lsid:zoobank.org:pub:DCC8AE3C-BD6C-43B4-A54F-FAB366DFDAAE
DOI	https://doi.org/10.5281/zenodo.4696984
persistent identifier	https://treatment.plazi.org/id/4608A06B-9940-9A1B-2F9D-9DE6686925FC
treatment provided by	Plazi
scientific name	Indoseges malkangiri
status	sp. nov.

Treatment

Indoseges malkangiri View in CoL sp. nov. Choudhury, Siliwal, Das & Giroti

urn:lsid:zoobank.org:act:5EB57046-CF2F-4E1E-890A-2E259273866A

( Fig. 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 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 GoogleMaps ; 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 GoogleMaps .

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 View FIGURE 2 ); tibia Iwith a row of short macrosetae on the retrolateral side (in I. sushildutta on the ventro-retrolateral side) ( Fig. 2 B View FIGURE 2 , 7 A View FIGURE 7 ) and lacks any apophysis (in I. sushildutta , tibiae Iwith distinct pointed basal apophysis) ( Fig. 2 A–C View FIGURE 2 , 7 A–C View FIGURE 7 ); 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 View FIGURE 2 , 7 A–C View FIGURE 7 ); 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 View FIGURE 3 , 8 A–D View FIGURE 8 ). 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 View FIGURE 5 ). 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 View FIGURE 1 View FIGURE 2 View FIGURE 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 View FIGURE 1 ); 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 View FIGURE 1 ); legs metatarsi Iin ventral distal half with a thorn-like macroseta; tibiae Iwith a row of short macrosetae on retrolateral side ( Fig. 2 B View FIGURE 2 ) and lacks any apophysis ( Fig. 2 A–C View FIGURE 2 ); femur Iwith a cluster of stridulatory macrosetae and lacks prominent tuberclelike apophysis ( Fig. 2 A–D View FIGURE 2 ); 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 View FIGURE 3 ). 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 View FIGURE 4 , 5 View FIGURE 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 View FIGURE 4 ); 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 View FIGURE 4 ); 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 View FIGURE 5 ). 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.