Ariadna chhotae, Siliwal & Yadav & Kumar, 2017

Siliwal, Manju, Yadav, Archana & Kumar, Dolly, 2017, Three new species of tube-dwelling spider genus Ariadna Audouin, 1826 (Araneae: Segestriidae) from India, Zootaxa 4362 (3), pp. 433-441 : 438-441

Ariadna chhotae sp. nov. Siliwal & Yadav

( Figures 11–13 , 16–17 , 22–23 )

urn:lsid:zoobank.org:act:7B9D 1203-2498 -4F84-86A5-2207F1487096

Holotype: female, 7.i.2010, India: Karnataka: Between Potoli and Janta Colony, Dandeli Wildlife Sanctuary, 619m (15 0 14' 52.3"N, 74 0 17' 55.3"E), coll. M. Siliwal, N. Gupta, S. Behera, WILD-10-ARA-563. Paratype: female, 28.iv.2010, same locality as the holotype, M. Siliwal, N. Gupta, WILD-10-ARA-1059.

Diagnosis. Female differs from A. nebulosa by presence of 3-4-2-3 spines on tibia I ventrally (in A. nebulosa 3-3 spines; in A. vansda sp. nov. 5-3 spines; in A. molur sp. nov. 4-4 spines) and mt I ventrally with 2–3 spines (in A. nebulosa and A. vansda sp. nov. 3-3 spines; in A. molur sp. nov. 6-5 spines). It differs from rest of the well described known species by anterior receptacles sclerotized, thick, short with dorsal lobe with bulged rounded tip distally ( Figs 16–17 , 22–23 ).

Etymology. The species epithet is derived from hindi word chhotae , which means small, referring to the small size of this species.

Description of holotype female (WILD-10-ARA-563). Total length 6.35. Carapace 2.94 long, 1.88 wide; abdomen 3.41 long, 2.06 wide. Carapace reddish-brown, anteriorly slightly darker, integument rough (pitted ridged in radiating pattern all along carapace); covered with few long and short brown hairs, more abundant on cephalic area than thoracic; fovea indistinct. Eyes with black rim; posterior row slightly procurved, PME distinctly larger; ocular group 0.47 long, 1.35 wide; eye diameter ALE 0.24, PME 0.29, PLE 0.24; inter-distances PLE-PME 0.24, PME-ALE 0.18; clypeus 0.18 high. Labium 0.53 long, 0.41 wide, orangish-brown, narrowing down in anterior one third; covered with long black hairs. Endites 1.06 long, 0.29 wide, long, broader at base and narrowest mid-length, orangish-brown except for distal tip pale, covered with long black hairs. Chelicerae blackish-brown. Sternum 1.65 long, 1.18 wide; orangish-brown with dark patches laterally; margins rebordered, sternum margins with precoxal triangles. Legs I–II and palp greenish-yellow, with faint dark patches on patella to tarsus; legs III–IV yellowish with greenish-yellow femur. Leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): Leg I: 1.82, 0.88, 1.35, 1.29, 0.76, 6.12; Leg II: 1.71, 0.82, 1.29, 1.24, 0.71, 5.76; Leg III: 1.35, 0.71, 0.76, 0.82, 0.53, 4.18; Leg IV: 1.82, 0.94, 1.47, 1.18, 0.59, 6.00; Palp: 0.11, 0.06, 0.09, -, 0.07, 0.32. Leg formula: 1423. Spines or macrosetae: Leg I: fe p1, ti p3, v6, r3, mt p2, v3; leg II: ti p3, v2, mt p2, v3; leg III: ti p2, v1, r3, mt p2, v2, r3; leg IV: ti v1, mt v2, ventro-retrolaterally one preening comb with four macrosetae; palp: ti p4, ta p9. Claws: largest on leg I and leg III smallest; paired claws with 7–17 teeth, inferior claw smooth; palp with single smooth claw, turned inward almost 90 degrees. Abdomen greyish brown, mottled with pale dots dorsally and ventrally. Spinnerets covered with brown hairs, colulus short covered with long hairs. Epigastric area darkened posteriorly to epigastric furrow. Internal genitalia with two receptacles, anterior receptacles sclerotized, ventral lobe shorter than dorsal lobe; dorsal lobe sclerotized laterally with unsclerotized round, bulged lobe distally; both posteriorly leading to common chamber ( Figs 16–17 , 22–23 ); uterus externus, transparent; inter-pulmonary ummodified; posterior receptaculum large, globular sac like ( Figs 16 , 22 ).

Paratype (WILD-11-ARA-1059). Total length 6.14. Carapace 2.14 long, 1.35 wide; abdomen 4.00 long, 1.88 wide. Eyes: ocular group 0.76 long, 1.00 wide; diameter PME 0.11, ALE 0.11, PLE 0.11; inter-distances PME-PLE 0.08, ALE-ALE 0.24, PME-ALE, 0.07. Clypeus height 0.08. Endites: 0.94 long, 0.22 wide. Labium: 0.88 long, 0.35 wide. Sternum: 2.65 long, 0.89 wide. Leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): Leg I: 1.47, 0.65, 1.18, 1.12, 0.47, 4.89; Leg II: 1.41, 0.71, 1.00, 1.00, 0.59, 4.71; Leg III: 1.06, 0.59, 0.62, 0.71, 0.35, 3.33; Leg IV: 1.59, 0.76, 1.18, 1.00, 0.35, 4.88; Palp: 0.54, 0.32, 0.27, -, 0.54, 1.67. Leg formula 1423. Remaining characters as in holotype.

Figures

FIGURES 11–13 Ariadna chhotae sp. nov., female (WILD-10-ARA-563). 11. Spider habitus; 12. Eyes; 13. Sternum, maxillae and labium.Scale for 12 = 0.10 mm, 11, 13 = 0.50 mm.

FIGURES 14–17. Female inTernal geniTalia, dorsal view. 14. Ariadna vansda sp. nov. (WILD-15-ARA-1369); 15. A. molur sp. nov. (WILD-10-ARA-620); 16 – 17. A. chhotae sp. nov. (WILD-10-ARA-563). Scale for 14-15, 0.20 mm, 16, 17 = 0.10 mm.

FIGURES 18–23. 18, 20, 22. internal genitalia, dorsal view; 19, 21, 23. lateral view of anterior receptacle. 18–19, Ariadna vansda sp. nov. (WILD-15-ARA-1369); 20–21, A. molur sp. nov. (WILD-10-ARA-620); 22–23. A. chhotae sp. nov. (WILD- 10-ARA-563).Scale for 18–21 = 0.10 mm;for 22, 23 = 0.05 mm.