Ariamnes petilus, Gao & Li, 2014

Gao, Cai-Xia & Li, Shu-Qiang, 2014, Comb-footed spiders (Araneae: Theridiidae) in the tropical rainforest of Xishuangbanna, Southwest China, Zoological Systematics 39 (1), pp. 1-135 : 13-17

Ariamnes petilus sp. nov. ( Figs 10–12 )

Holotype ♂, China, Yunnan, Xishuangbanna, Menglun Nature Reserve , secondary tropical seasonal moist forest (21º54.607'N, 101º17.005'E), 28 July 2007, Guo Zheng leg.

Etymology. The specific name derives from the Latin adjective petilus and means slender, in reference to pedipalpi pale, effeminate, slender than other species of the genus.

Diagnosis. Members of the new species are similar to those of A. laau , but can be distinguished by having the tegular apophysis large, with tiny outgrowth; conductor sheetlike, membranous, enveloping curving embolus.

Male. Total length 15.20. Prosoma 3.25 long, 1.20 wide, flat, unmodified, pale, with 2 black stripes, black edge. Sternum 1.30 long, 0.75 wide, with grey spots. Opisthosoma 11.95 long, 0.85 wide, pale, with black, white spots, posterior part vermiform, black, with dense (fix throughout!!) spines, with large colulus. Eye measurements: AME 0.11, ALE 0.09, PME 0.09, PLE 0.08, AME-AME 0.15, AME-ALE 0.06, PME-PME 0.13, PME-PLE 0.06. Clypeus height about 2.22 times AME diameter, pale, with apophysis, long setae. Chelicerae: pale, without tooth; fangs long, slender. Endites: 1.00 long, 0.50 wide, pale with brown pro-edges. Labium fused with sternum, 0.23 long, 0.30 wide, with 8 setae, pale. Leg measurements: I 19.50 (6.65, 0.75, 5.25, 5.10, 1.75); II 10.65 (3.65, 0.50, 3.00, 2.25, 1.25); III 5.70 (2.10, 0.35, 1.35, 1.20, 0.70); IV 17.00 (6.35, 0.60, 4.30, 4.00, 1.75). Leg I coxa pale, with black spot; femur pale, with black spots; patella pale, with black spots; tibia pale to grey, with brown spots; metatarsus pale to grey, with brown spots; tarsus grey; femur without spine, patella with 1 spine, tibia with many trichobothria, metatarsus and tarsus without spine. Legs II–IV similar to leg I, tarsus II–IV pale, with black rings. Pedipalpus ( Figs 10A–B , 11A–B , 12A–D ): tibia pale, with black spot, 3 trichobothria; cymbium yellow, with black spots; paracybium hooked; subtegulum narrow; tegulum large, conjoined with median apophysis; median apophysis smooth, with acute angle; embolus curved, without apophysis; conductor surrounding distal part of embolus; tegular apophysis large, with many distal apophyses.

Female. Unknown.

© Zoological Systematics, 39 (1): 1–135

© Zoological Systematics, 39 (1): 1–135

© Zoological Systematics, 39 (1): 1–135

© Zoological Systematics, 39 (1): 1–135

Distribution. Only known from type locality (Yunnan).

Figures

Fig. 10. Ariamnes petilus sp. nov., holotype male. A. Pedipalpus, prolateral view; B. Pedipalpus, retrolateral view. Scale bar = 0.10mm.

Fig. 11. Ariamnes petilus sp. nov., holotype male. A. Pedipalpus, ventral view; B. Embolus, ventral view. Scale bars = 0.10mm.

Fig. 12. Ariamnes petilus sp. nov., holotype male. A. Pedipalpus (cymbium removed), ventral view; B. Pedipalpus, ventral view. C. Pedipalpus, prolateral view; D. Pedipalpus, retrolateral view. Scale bars = 0.10 mm.