Xyphinus pakse sp. nov.

Figures 11, 12

Type material: Holotype: Male (IZCAS AR 19394), Laos, Champasak Province, Pakse, Phou Salao, 15º05.284'N, 105º48.671'E, elevation 242 meters, November 15, 2012, leg. S. Li.

Etymology: The specific name is a noun in apposition taken from the type locality.

Diagnosis: The new species is similar to X. abanghamidi Deeleman-Reinhold, 1987, but can be distinguished by the finely microsculpture on anterior surface of male palpal patella and tibia; the very strong, black setae at distal end of male cymbium and the complicated apophyses on palpal bulb.

Description: Male (holotype). Carapace yellow, dorsal scutum yellow-brown, chelicerae, sternum, legs and ventral scutum light yellow. Body length 1.72; carapace 0.79 length, 0.66 width; abdomen 0.92 length, 0.55 width. Habitus as in Figs 11 A, B. Carapace dorsally smooth, covered with rows of short hairs; sides finely reticulate; carapace margin with two rows of small denticles on either side and some larger denticles on the posterior slope (Figs 11 C, D). No fovea. Posterior pits lacking. Eyes six, ALE largest, PLE smallest; posterior eye row slightly recurved from above, procurved from front. Clypeus with sinuous anterior margin; clypeus height about 2.5 times the diameter of anterior eyes (Fig. 11 E). Chelicerae teethless, with finely microsculpture on the promargin (Fig. 11 G). Endites with apical rim (Fig. 11 I). Sternum smooth. Legs spineless. Shape of abdomen normal, not overlapping the carapace (Fig. 11 B). Dorsal scutum ovoid, smooth, covering nearly entirely abdominal length. Booklung covers ovoid, large. Pedicel tube ribbed, scuto-pedicel region and anterior part of dorsal scutum with many small denticles (Fig. 11 H). Sperm pore oval, medium sized, situated at level of anterior spiracles. Postepigastric scutum strongly sclerotized; spinneret scutum present, incomplete ring. Palp (Figs 11 J–L, 12A–C): femur inserted near the middle of patella; patella and tibia with finely microsculpture on anterior surface; cymbium strongly elongated prolaterally, with two short, black, very strong setae at distal end; bulb with complicated apophyses.

Female: Unknown.

Distribution: Known only from the type locality.