Ariadna vansda, 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 : 434-436

Ariadna vansda sp. nov., Siliwal, Yadav & Kumar

( Figures 1–5 , 14 , 18–19 )

urn:lsid:zoobank.org:act:444BC9A6-7775-4023-8F8D-76B106163CEF

Type specimens. Holotype: female, 11.iv.2015, India: Gujarat: Vansda National Park [20° 45.138"N, 73° 29.005"E, elev. 131m], coll. M. Siliwal, Reshma Solanki, Archana Yadav, WILD-15-ARA-1369.

Paratypes: 1 female, same data as holotype, WILD-15-ARA-1370 ; 1 female, 11.xii.2015, same locality as holotype, coll. Archana Yadav, WILD-15-ARA-1250.

Diagnosis. Female differs from A. nebulosa by presence of 5-3 spines on tibia I ventrally (in A. nebulosa 3-3 spines). It differs from rest of the well described known species by the anterior receptacle highly sclerotized, broader at base with pointed and tapering dorsal and ventral lobes ( Figs 14 , 18–19 ); interpulmonary fold with broad sclerotization, rounded thick margin at the middle, and broad flap-like lateral extensions with smooth dorsal margins ( Figs 14 , 18 ).

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

Description of holotype female (WILD-15-ARA-1369). Total length 10.4. Carapace. 4.4 long, 2.9 wide; abdomen 6.0 long, 3.8 wide. Carapace, narrower anteriorly, brownish-black, anteriorly darker, integument rough; covered with long brown hairs, relatively more on caput. Cephalic area higher than thoracic area; fovea indistinct. Eyes six (AME absent) grouped in three pairs, PME anteriorly displaced forming slightly recurved row with PLE; eyes pale in colour and subequal in size; ocular group 0.41 long, 1.18 wide; eye diameter ALE 0.19, PME 0.19, PLE 0.14; inter-distances PLE-PME 0.25, ALE-ALE 0.53; clypeus 0.29 high. Labium 1.00 long, 0.71 wide, orangish-brown lighter anteriorly; narrowing down in anterior one third; covered with long black hairs. Endites 1.6 long, 0.86 wide, long, broader at base and narrowest at middle, orangish-brown except for anterior pale or white, covered with long black hairs. Chelicerae black with three promarginal teeth and one retromarginal tooth. Legs and palp orangish-brown, with darkened patches (including coxae and trochanters) on all legs, more distinct on anterior legs. Sternum 2.5 long, 2.00 wide; orangish-brown with dark patches laterally and medially more distinct on lateral half; margins rebordered, sternal margins with precoxal triangles. Leg measurements (femur, patella, tibia, metatarsus, tarsus, total length): Leg I: 3.22, 1.39, 2.44, 2.17, 1.11, 10.33; Leg II: 3.11, 1.56, 2.33, 2.00, 1.00, 10.00; Leg III: 2.44, 1.22, 1.39, 1.67, 0.89, 7.61; Leg IV: 3.33, 1.56, 2.44, 2.00, 0.89, 10.22; Palp: 0.93, 0.78, 0.71, -, 1.00, 3.42. Leg formula 1423. Spines or macrosetae: Leg I: ti p5, r3, mt p3, r3; leg II: ti p4, r2, mt p2, r3; leg III: ti v1, d2; mt p1, v4, r3, d2; leg IV: mt v3, ventro-retrolaterally one preening comb with three macrosetae; palp: ti p2, ta p3, v2. Claws: largest on leg I; paired claws with 7–11 teeth, unpaired claw appears smooth; true claw tufts absent; palp with single smooth claw, turned inward almost 90 degrees. Abdomen greyish brown, mottled with pale dots dorsally; ventrally greyish without any pattern. Spinnerets covered with brown hairs, colulus short covered with long hairs. Epigastric area covered with black setae on anterior and posterior sides of epigastric furrow. Internal genitalia with two receptacles, anterior receptacle sclerotized, broad at its base, with pointed ventral lobe; dorsal lobe transparent, with sclerotized lateral margins, covering basal one third of ventral lobe, slightly shorter than ventral lobe ( Figs 14 , 18–19 ); uterus externus with lightly sclerotized margins; posterior receptaculum large, sac like ( Figs 14 , 18 ).

Paratype (WILD-15-ARA-1250). Total length 9.61. Carapace 3.69 long, 2.46 wide; abdomen 5.92 long, 3.46 wide. Eyes: ocular group 0.30 long, 0.60 wide; diameter PME 0.2, ALE 0.2, PLE 0.2; distance between PLE-PME 0.26; clypeus height 0.35. Endites: 1.3 long, 0.54 wide. Labium: 0.77 long, 0.46 wide. Sternum: 2.15 long, 1.38 wide. Leg measurements (femur, patella, tibia, metatarsus, tarsus, total length): 3.22, 1.39, 2.44, 2.17, 1.11, 10.33; Leg II: 3.11, 1.56, 2.33, 2.00, 1.00, 10.00; Leg III: 2.44, 1.22, 1.39, 1.67, 0.89, 7.61; Leg IV 3.33, 1.56, 2.44, 2.00, 0.89, 10.22; Palp: 0.93, 0.78, 0.71, -, 1.00, 3.42. Leg formula 1423. Remaining characters as in holotype.

Figures

FIGURES1–5. Ariadna vansda sp. nov. female (WILD-15-ARA-1369). 1. spider habitus; 2. Eyes; 3. Sternum, maxillae and labium; 4. Spinnerets; 5. External epigyne.Scale for 1 = 1.00 mm, 3,5 =0.50 mm, 2, 4 = 0.10 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.