Ariamnes columnaceus, 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 : 11-13

Ariamnes columnaceus sp. nov. ( Figs 7–9 )

Holotype ♂, China, Yunnan, Xishuangbanna, Menglun Nature Reserve , secondary tropical seasonal moist forest (21º54.390'N, 101º16.811'E), 10 August 2007, Guo Zheng leg.

Etymology. The specific name derives from the Latin adjective columnaceus and means columned, in reference to the column-shaped tegular apophysis.

Diagnosis. The new species is similar to A. cylindrogaster , but can be distinguished by the cymbium without divarication; the embolus longer than the latter species (Yoshida, 2003a); conductor membranous, edge sclerotized lightly;

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

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

tegular apophysis column-shaped.

Male. Total length 22.75. Prosoma 2.25 long, 1.00 wide, flat, unmodified, yellow, with black stripes. Sternum 1.15 long, 0.70 wide, yellow, with dark spots. Opisthosoma 20.50 long, 0.70 wide, pale, with black stripes, white spots, posterior part vermiform, black, with dense spines, large colulus. Eye measurements: AME 0.13, ALE 0.08, PME 0.09, PLE 0.09, AME-AME 0.13, AME-ALE 0.03, PME-PME 0.09, PME-PLE 0.03. Clypeus height about 2 times AME diameter, yellow, with row of setae, tiny apophysis. Chelicerae: yellow, without spot, with 1 anterior tooth, 1 posterior tooth; fangs long, slender. Endites: 0.46 long, 0.25 wide, yellow with brown pro-edges. Labium fused with sternum, 0.13 long, 0.31 wide, with 6 setae, yellow. Leg measurements: I 16.95 (5.60, 0.75, 4.50, 4.50, 1.60); II 8.95 (3.00, 0.50, 2.35, 2.00, 1.10); III 5.65 (1.65, 0.40, 1.90, 1.00, 0.70); IV 13.85 (4.75, 0.55, 3.30, 3.50, 1.75). Leg I coxa yellow, with black spot; femur-tibia yellow with black spots; metatarsus and tarsus yellow, with black ring; femur and patella without spine; tibia with 3 trichobotria; metatarsus and tarsus with many trichobotria. Legs II–IV similar to leg I. Pedipalpus ( Figs 7A–B , 8A–B , 9A–D ): tibia yellow with 2 trichobothria; cymbium yellow, without spot; paracymbium hooked; subtegulum center depressed; tegulum connected with median apophysis; median apophysis large, smooth, without apophysis; embolus long, without basal process; conductor membranous, with sclerotized tip; tegular apophysis columned, with many small apophyses.

Female. Unknown.

Distribution. Only known from type locality (Yunnan).

Figures

Fig. 7. Ariamnes columnaceus sp. nov., holotype male. A. Pedipalpus, prolateral view; B. Pedipalpus, retrolateral view. Scale bar = 0.10mm.

Fig. 8. Ariamnes columnaceus sp. nov., holotype male. A. Pedipalpus, ventral view. B. Embolus, ventral view. Scale bars = 0.10mm.

Fig. 9. Ariamnes columnaceus sp. nov., holotype male. A. Pedipalpus (cymbium removed), ventral view; B. Pedipalpus, ventral view; C. Pedipalpus, prolateral view; D. Pedipalpus, retrolateral view. Scale bars = 0.10mm.