Patu catba S. Li & Lin sp. nov.

Figures 1, 23

Type material.

Holotype ♂ (IZCAS-Ar 41036) Vietnam: Cat Ba National Park, Hai Phong Province, in leaf litter of natural forest (20.80133°N, 107.00353°E; 116 m alt.), 23.IX.2007, D. Pham leg.

Etymology.

The specific epithet derives from the type locality; noun in apposition.

Diagnosis.

This new species differs from other Patu species with the exception of P. damtao sp. nov. by having a long, sclerotised conductor dorsally on the bulb (Figs 1D and 4D). It can be distinguished from P. damtao sp. nov. by the blunt conductor swollen basally, the shorter embolus forming no more than one loop and the presence of a median apophysis (Fig. 1D and E) vs. a sharp conductor constricted basally, a longer embolus forming more than one loop and the absence of a median apophysis (Fig. 4D and E).

Description.

Male (IZCAS-Ar 41036). Total length 0.56. Carapace 0.24 long, 0.28 wide, 0.32 high. Clypeus 0.14 high. Sternum 0.16 long, 0.16 wide. Abdomen 0.40 long, 0.36 wide, 0.40 high. Length of legs: I 0.74 (0.20, 0.10, 0.16, 0.12, 0.16); II 0.66 (0.20, 0.10, 0.12, 0.10, 0.14); III 0.50 (0.12, 0.08, 0.08, 0.08, 0.14); IV 0.56 (0.12, 0.10, 0.12, 0.10, 0.12).

Somatic characters (Fig. 1A-C). Colouration: carapace brown, nut brown at margins, ocular base black, thoracic region reticulated medially. Chelicerae, endites and labium dark brownish. Sternum nut brown. Legs brownish to dark yellow, except femur I yellow. Abdomen brown and grey, with dense, light dots. Prosoma: carapace wider than long, nearly pyriform. Eyes with ocular tubercles, PME> ALE> PLE, ALE protruded, PER recurved. Sternum slightly swollen, smooth and glossy, sparsely punctate. Legs: with 1 dorso-distal seta on each patella and 1 seta on each tibia sub-proximally. Tibia II with 2 subdisto-ventral clasping spines. Opisthosoma: dorsally rounded, laterally nearly ovoid. Spinnerets brown, darker at edges.

Palp (Fig. 1D and E): large, ~ ⅓ size of carapace. Femur slightly swollen, patella ~ ½ length of tibia, tibia flat. Cymbium translucent, membranous, surrounds bulb prolaterally, with a finger-like extension, with 2 distal, long setae. Bulb subovate. Tegulum smooth. Median apophysis short, not extending beyond apex of bulb. Conductor long, finger-like, sclerotised, basally swollen, distally blunt. Embolus ca. 2 × length of conductor, ribbon-like, middle portion embedded in tegulum, distal portion looped at the apex of bulb.

Female. Unknown.

Distribution.

Vietnam (Fig. 23).