Flexicrurum flexicrurum, flexicrurum, 2007

Tong, Yanfeng & Li, Shuqiang, 2007, First Records Of The Family Ochyroceratidae (Arachnida: Araneae) From China, With Descriptions Of A New Genus And Eight New Species, Raffles Bulletin of Zoology 55 (1), pp. 63-76 : 64

Flexicrurum flexicrurum , new species

( Figs. 1A–D , 2A–E , 10 )

Material examined. – Holotype: male ( IZCAS), Mountain Wuzhishan (18 ° 49'N 109 ° 39'E), Wuzhishan City, Hainan Island, China, coll. X. Han, 16 Apr.2005.

Diagnosis. – The new species can be distinguished from F. longispina , new species, and F. minutum , new species, by the modified maxillae, the differences in patterns of carapace and abdomen, the presence of rings on femur and tibia, and the differences of conductor details.

Description. – Male: Total length 1.51. Carapace 1.04 long, 0.86 wide; abdomen 1.20 long, 0.55 wide. Carapace with three wide longitudinal dark bands, lateral margin rounded, but posterior widely truncated. Anterior margin of thoracic region distinctly elevated. Before it a light rounded patch present on middle area. The fovea is shallow and does not reach the posterior thoracic margin. Clypeus slanting, with a wide longitudinal dark band on middle area. The ratio of carapace to clypeus is about 3: 1. Chelicerae creamy. Cheliceral promargin without teeth, retromargin with 2 small teeth. The posterior surface of fang provided with 15 small denticles. Maxillae light pigmented, with small sclerotized denticles on antero-inner margin. Labium dark, basally with two light rounded area. Sternum dark. Abdomen is strongly perpendicular to carapace in lateral view, and with complicated patterns on dorsal and ventral surfaces. Legs brown, femur with one narrow white ring distally, tibia with two broad white ring, metatarsus and tarsus nearly white. Leg measurements: I 10.23 (2.68, 0.27, 3.10, 2.98, 1.20); II 7.56 (2.08, 0.25, 2.13, 2.05, 1.05); III 6.05 (1.63, 0.25, 1.63, 1.65, 0.89); IV 9.23 (2.53, 0.27, 2.70, 2.55, 1.18). Leg formula: 1 4 2 3. Palp measurements: 1.34 (0.61, 0.21, 0.35, 0.17), bulb 0.39 long. Palpal femur distally slightly incrassated and upward, then downwards forward. Patella downward and connected the strongly inner turned but straight tibia. Palpal tarsus slightly upward, provided with a strong lateral protrusion. Tibia and tarsus dark pigmented. Bulb with a slender apophysis. Conductor complicated.

Female: Unknown.

Etymology. – The specific name flexicrurum denotes that this is the type species of the genus Flexicrurum .

Figures

Fig. 1. Flexicrurum flexicrurum, new species: A–D; Flexicrurum longispina, new species: E–H; Flexicrurum minutum, new species: I–L. A, E, F, carapace of male; B, F, J, male in lateral view; C, G, K, abdomen of male in dorsal view; D, H, L, abdomen of male in ventral view.

Fig. 2. Flexicrurum flexicrurum, new species: A, maxillae and labium, anterior view; B, chelicerae, posterior view (the arrow refers to the small denticles); C, left palp, retrolateral view (the arrow refers to the embolus); D, left palp, prolateral view (the arrow refers to the bulbal apophysis); E, left palpal bulb, dorsal view. Scale bars: A, C–E = 0.2 mm, B = 0.1 mm.

Fig. 10. Collection localities of Chinese Ochyroceratidae.