Ariadna molur

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: 436

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Ariadna molur

sp. nov.

Ariadna molur  sp. nov., Siliwal & Yadav

( Figures 6–10View FIGURES6–10, 15View FIGURES 14–17, 20–21View FIGURES 18–23. 18, 20, 22)

Type specimens. Holotype: female, 29.i.2010, India: Karnataka: Kulgi, Dandeli Wildlife Sanctuary , 513m (15 0 10' 09.6"N, 74 0 38' 02.3"E), coll. M. Siliwal, N. Gupta and S. Behra, WILD-10-ARA-620. 

Paratype: 1 female, same data as holotype, WILD-10-ARA-612. 

Diagnosis. Female differs from A. nebulosa  by presence of 4-4 spines on tibia I ventrally (in A. nebulosa  3-3 spines; in A. vansda  sp. nov. 5-3 spines) and mt I ventrally with 6-5 spines (in A. nebulosa  and A. vansda  sp. nov. 3-3 spines). It differs from rest of the well described known species by the anterior receptacle, long, strongly sclerotized with pointed tip ( Figs 15View FIGURES 14–17, 20–21View FIGURES 18–23. 18, 20, 22) [in A. vansda  sp. nov. AR broader at its base, with dorsal lobe slightly sclerotized]. Interpulmonary fold narrow, widely convex at middle, and lateral parts with dorsal saw-like extensions ( Figs 15View FIGURES 14–17, 20View FIGURES 18–23. 18, 20, 22) [in A. vansda  sp. nov., the interpulmonary fold have a widened sclerotization at middle, and its lateral parts lacking dorsal extensions].

Etymology. The species epithet is a noun in apposition, in honor of the founder of Wildlife Information Liaison Development Society, Dr. Sanjay Molur for his efforts to popularize Indian spider research.

Description of holotype female (WILD-10-ARA-620). Total length 9.61. Carapace 5.23 long, 3.30 wide; abdomen 6.30 long, 4.00 wide. Carapace reddish-brown, anteriorly darker, integument rough (pitted ridged in radiating pattern all along carapace); covered with long and short brown hairs, more abundant on caput. Cephalic area higher than thoracic area; caput slightly raised fovea indistinct. Eyes: ocular group 0.4 long, 0.9 wide; diameter PME 0.22, ALE 0.22, PLE 0.28; inter-distance between eyes: PLE-PME 0.22, ALE-ALE 0.61; clypeus 0.28 high. Labium 0.92 long, 0.77 wide, orangish-brown, narrowing down in anterior one third; covered with long black hairs. Endites 1.67 long, 0.77 wide, long, broader at base and narrowest at middle, orangish-brown except for pale, distal tip, covered with long black hairs. Chelicerae orangish-brown. Sternum 2.92 long, 1.85 wide; blackishbrown; margins rebordered, precoxal triangles present. Legs I –II and palp brownish-black, with dark patches (including coxae and trochanter), legs III –IV orangish-brown with darker patches on coxae, trochanters and femora. Leg measurements (femur, patella, tibia, metatarsus, tarsus, total length): Leg I: 3.00, 1.33, 2.00, 2.11, 1.00, 9.44; Leg II: 3.67, 1.67, 2.89, 2.56, 1.00, 11.79; Leg III: 3.33, 1.67, 2.56, 2.33, 0.89, 10.78; Leg IV: 3.78, 1.56, 2.78, 2.11, 0.78, 11.01; Palp: 1.22, 0.78, 1.22, -, 1.00, 4.22. Leg formula 1243. Spines or macrosetae: Leg I: ti p4, r4, mt p6, r5; leg II: fe p1, ti p3, v1, mt p5, r3; leg III: fe p1, ti p2, v2, r1, mt p2, r2, v6; leg IV: fe d1, mt v4, ventro-retrolaterally one preening comb with four macrosetae; palp: ti p5, ta p7. Claws: largest on leg I; paired claws with 8–12 teeth, inferior claw smooth; palp with single bare 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 covered with black patch except for anterior epigynal fold glabrous, orangish-brown. Internal genitalia with two receptacles; anterior receptacle sclerotized with ventral lobe long and high, pointed towards tip, dorsal lobe shorter than ventral lobe, slightly sclerotized with pointed tip; both posteriorly leading to common chamber ( Figs 15View FIGURES 14–17, 20–21View FIGURES 18–23. 18, 20, 22); uterus externus transparent; inter-pulmonary fold narrowly sclerotized, convex at middle, lateral parts with dorsal saw-like extensions; posterior receptaculum large, globular sac-like ( Figs 15View FIGURES 14–17, 20View FIGURES 18–23. 18, 20, 22).

Paratype (WILD-11-ARA-612). Total length 10.44. Carapace 4.11 long, 2.78 wide; abdomen 6.33 long, 3.33 wide. Eyes: ocular group 0.76 long, 1.00 wide; diameter PME 0.24, ALE 0.24, PLE 0.18; inter-distances PLE-PME 0.29, ALE-ALE0.53, PME-ALE, 0.24; clypeus height 0.29. Endites: 1.76 long, 0.59 wide. Labium: 0.88 long, 0.65 wide. Sternum: 2.65 long, 1.71 wide. Leg and palp measurements (femur, patella, tibia, metatarsus, tarsus, total length): Leg I: 3.41, 1.59, 2.47, 2.06, 1.06, 10.59; Leg II: 3.06, 1.59, 2.47, 2.24, 1.12, 10.47; Leg III: 2.59, 1.35, 1.59, 1.88, 1.06, 8.47; Leg IV: 2.88, 1.47, 2.24, 2.06, 1.00, 9.65; Palp: 1.24, 0.71, 0.59, -, 1.12, 3.65. Leg formula 1243. Remaining characters as in holotype.