Indoseges narayani Choudhury & Siliwal & Das & Giroti 2021, sp. nov.
Creators: name: Choudhury, Sudhir Ranjan
name: Siliwal, Manju
name: Das, Sanjay Keshari
name: Giroti, André Marsola
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Segestriidae
Indoseges
Indoseges narayani

description: 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.
description: 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 107-110, DOI: 10.11646/zootaxa.4963.1.4, http://zenodo.org/record/4719875