Indoseges satkosia, 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 : 111-112

Indoseges satkosia sp. nov. Das, Siliwal, Choudhury & Giroti

urn:lsid:zoobank.org:act:AD447F5B-2E55-4524-BC25-4F82A889F958

( Fig. 15 , 16 , 17B )

Type specimens: INDIA. holotype ♀, 02.iii.2017, Tuluka road, Satkosia, Anugul district , Odisha (20° 36’ 19.9”N, 84° 57’ 22.0”E, elev. 178m), coll. S.K. Das, S. R. Choudhury and N. Panda, IPU-17-ARA-460 ; paratypes 2 ♀ same data as holotype, IPU-17-ARA-455, IPU-17-ARA-456 .

Diagnosis: Females of I. satkosia differs from all other congers by having 2-4 arrangement of ventral macrosetae on tibiae I (in all other species it is 3-3 arrangement of ventral macrosetae), five ventral macrosetae on metatarsi IV (four in I. malkangiri and I. sushildutta , two in I. chilika and I. satkosia ), and a distinct internal genitalia: anterior receptaculum stump-like with a broad, elongated base and pointed apex being twisted distally; ventral lobe with few shallow entapophyses; uterus externus indistinct; interpulmonary fold sclerotized forming a very conspicuous and well developed median flap and with crossed lateral extensions; posterior receptaculum with conical edges ( Fig. 16 A-D). Females also differ from rest of the species except I. malkangiri by having three ventral macrosetae on tibiae IV (in all other species one ventral macroseta)

Etymology: The species epithet is a noun in apposition, referring to the type locality, Satkosia.

Description of holotype female (IPU-17-ARA-460) ( Fig. 15 , 16 , 17B ). Total length 9.16; carapace 4.36 long, 2.68 wide; abdomen 4.80 long, 2.95 wide; carapace covered with long and short brown hairs, relatively more on caput; clypeus 0.30 high; ocular group 0.25 long, 0.90 wide; eye diameter ALE 0.15, PME 0.15, PLE 0.16; inter-distances PLE-PME 0.15, ALE-ALE 0.47; abdomen ventrally pale greyish mottled with pale dots in radiating pattern; labium 0.86 long, 0.57 wide; endites 1.42 long, 0.54 wide; sternum 2.36 long, 1.47 wide; leg measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.79, 1.16, 2.19, 2.02, 0.94, 9.10; leg II: 2.69, 1.16, 2.20, 1.97, 0.95, 8.99; leg III: 2.11, 0.99, 1.13, 1.48, 0.65, 6.36; leg IV: 2.88, 1.31, 2.27, 1.90, 0.65, 9.01; palp: 1.01, 0.58, 0.52, -, 0.93, 3.04; leg formula 1423; macrosetae: leg I: fep 1, ti p1-1-1, vp 1-0-0-1, vr 1-1-1-1, mtvp 1-1-1, vr 1-0-1; leg II: fep 1, tip 1-1-1, vp 0-0-1, vr 1-1-1, mtp 1, vp 0-1-1, vr 1-1-1; leg III: tip 1-1, r 1-1, v 0-0-2, mtp 1-1-0, r 1-1-0, vp 0-0-2, vr 1-1-2; leg IV: ti vp 0-0-1, vr 0-1-1, mt vp 0-0-0-0, vr 1-1-1-2, preening comb with four ventro-retrolateral macrosetae on metatarsi IV; palp: ti p 1-1-1, ta p 11; teeth on paired claws of legs: I: 15, II: 13, III: 10, IV: 9; female genitalia distinct; internal genitalia with a stump-like anterior receptaculum having a broad, elongated base and pointed apex being twisted distally; dorsal lobe spherical; ventral lobe with few shallow entapophyses; uterus externus indistinct; interpulmonary fold sclerotized forming a very conspicuous and well developed median flap and with crossed lateral extensions; posterior receptaculum with conical edges ( Fig. 16 A–D ). Remaining characters same as in females of I. malkangiri .

Variation in females [n=3, measurements: range (mean±standard deviation)]. Total length 8.80–9.16 (9.01±0.19); carapace. 4.00–4.36 (4.14±0.20) long, 2.39–2.68 (2.51±0.15) wide; abdomen 4.75–5.08 (4.88±0.18) long, 2.80–3.24 (3.00±0.22) wide; clypeus 0.30 (0.30±0.00) high; ocular group 0.25–0.32 (0.29±0.04) long, 0.82– 0.90 (0.85±0.04) wide; eye diameter ALE 0.15–0.18 (0.17±0.02), PME 0.15–0.18 (0.17±0.02), PLE 0.16–0.18 (0.17±0.01); inter-distances PLE-PME 0.09–0.15 (0.11±0.03), ALE-ALE 0.35–0.47 (0.41±0.06); labium 0.73–0.86 (0.78±0.07) long, 00.52–0.57 (0.53±0.03) wide; endites 1.24–1.42 (1.31±0.10) long, 0.49–0.54 (0.52±0.03) wide; sternum 2.28–2.36 (2.31±0.05) long, 1.39–1.47 (1.42±0.04) wide; leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): leg I: 2.50–2.79 (2.60±0.16), 1.09–1.16 (1.12±0.04), 1.86–2.19 (1.99±0.18), 1.81–2.02 (1.88±0.12), 0.94–0.99 (0.97±0.03), 8.33–9.10 (8.56±0.47); leg II: 2.38–2.69 (2.51±0.16), 1.10–1.16 (1.13±0.03), 1.88–2.22 (2.00±0.19), 1.70–1.97 (1.85±0.14), 0.92–0.95 (0.93±0.02), 8.05–8.99 (8.43±0.50); leg III: 1.88–2.11 (1.96±0.13), 0.85–0.99 (0.91±0.07), 1.07–1.13 (1.10±0.03), 1.35–1.48 (1.41±0.07), 0.57–0.65 (0.62±0.04), 5.79–6.36 (6.00±0.31); leg IV: 2.58–2.88 (2.68±0.17), 1.23–1.31 (1.26±0.04), 2.00–2.27 (2.12±0.14), 1.68–1.90 (1.77±0.11), 0.65–0.66 (0.66±0.01), 8.15–9.01 (8.49±0.46); palp: 0.89–1.01 (0.96±0.06), 0.56–0.58 (0.57±0.01), 0.48–0.53 (0.51±0.03), 0.78–0.93 (0.83±0.08), -, 0.78–0.93 (0.83±0.08), 2.78–3.04 (2.88±0.14).

Figures

FIGURE 15. Indoseges satkosia sp. nov. ♀: A–C (IPU-17-ARA-460), A. Habitus, B. Sternum, maxillae, labium and labrum, C. Spinnerets; D–G SEM images, D. Eyes, E. Left chelicera, F. Right palp prolateral view; Scale for A, B=1 mm, C=0.50mm, D, F=0.20mm, E=0.1mm.

FIGURE 16. Indoseges satkosia sp. nov. ♀: A–D (IPU-17-ARA-460), 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.