Indoseges narayani, 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 : 107-110

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.

Figures

FIGURE 13. Indoseges narayani sp. nov. ♀: A–C (IPU-17-ARA-952), A. Habitus, B. Sternum, maxillae, labium and labrum, C. Spinnerets; D–G SEM images, D. Eyes, E. Left chelicera, F. Claw of leg IV, G. Right palp prolateral view; Scale for A, B=1 mm, C=0.50mm, D, F, G=0.20mm, E=0.1mm.

FIGURE 14. Indoseges narayani sp. nov. ♀: A–C (IPU-17-ARA-952), A, C. Internal genitalia ventral view, B, D. Same lateral view; Scale for A–D=0.2mm.

FIGURE 17. A. Indoseges narayani sp. nov. ♀ in life; B. Indoseges satkosia sp. nov. ♀ in life; C. Burrow on road side earthen cliff; D. Burrow on log; E. Burrow on termite mound; F. Burrow on tree trunk.