Alistra annulata sp. nov.

Figs 1–2

Type material. Holotype: Male, China, Yunnan Province, Xishuangbanna Dai Autonomous Prefecture, Mengla County, Menglun Nature Reserve, canopy of primary tropical seasonal rainforest (fogging), 22 July 2007, G. Zheng leg. Paratype: 1 male, Menglun Nature Reserve, canopy of the secondary tropical seasonal moist forest (fogging), 27 July 2007, G. Zheng leg.

Etymology. The specific name is taken from the Latin word ‘ annulatus ’, meaning ringed and referring to the annular embolus along the edge of tegulum of male palp; adjective.

Diagnosis. Male of the new species similar to A. hippocampa sp. nov. (Figs 3 A–C, 4A–F) in having short patellar and tibial apophyses, slender embolus, short cymbial furrow and the absence of median apophysis and conductor, but distinguished from the latter by the tiny teeth on the RTA (Figs 1 B–C, 2E–F), the long embolus (Figs 1 A–B, 2D–E) and the relatively shallow cymbial furrow (Figs 1 B, 2E).

Description. Male (holotype, Figs 2 A–C). Total length 1.20. Prosoma 0.54 long, 0.45 wide. opisthosoma 0.68, 0.55 wide. Eye sizes and interdistances: AME 0.03, ALE 0.06, PME 0.04, PLE 0.05; AME–AME 0.03, AME–ALE 0.01, PME–PME 0.05, PME–PLE 0.02, ALE–PLE 0.01. MOA 0.11 long, front width 0.06, back width 0.12. Clypeus height 0.06. Leg measurements: I 1.43 (0.44, 0.47, 0.26, 0.26); II 1.37 (0.40, 0.45, 0.27, 0.25); III 1.27 (0.36, 0.41, 0.25, 0.25); IV 1.57 (0.42, 0.52, 0.34, 0.29). Leg formula: 4123.

Body yellowish, with black eyes pigment. Three thin bright chevron-like markings located on the dorsal surface of opisthosoma (Figs 2 A–C).

Male palpal patella with a thorn-like apophyis retrolaterally, which pointing proximally and dorsally. RTA originating on the distal margin ventro-retrolaterally and pointing dorsally, with several tiny teeth. Embolus originating retrolaterally and coiling clockwise 360° along the margin of the tegulum (left palp). Conductor and median apophysis absent. A shallow furrow located on cymbium basal-retrolaterally, which length shorter than half cymbial length (Figs 1 A–C, 2D–F).

Female. unknown.

Distribution. Known only from the Xishuangbanna rainforest, Yunnan Province, China.