Flexicrurum wuzhishanense Li & Li

Chang, Wan-Jin, Li, Fengyuan & Li, Shuqiang, 2019, On the genus Flexicrurum Tong & Li, 2007 (Araneae, Psilodercidae) from Hainan Island, China, ZooKeys 855, pp. 15-30 : 17

Flexicrurum wuzhishanense Li & Li sp. nov. Figs 1, 2, 8A, 9

Types.

Holotype: ♂ (IZCAS), China, Hainan Island, Wuzhishan City, Shuiman Village, Wuzhishan, 18°54.1944'N, 109°40.9266'E, 723 m, 31.III.2012, Chen Z. leg.; Paratype: 1♀ (IZCAS), same data as holotype.

Etymology.

The species name is an adjective referring to the type locality; the Chinese pinyin "wǔ zhǐ” means five fingers, and “shān” means mountain. The name is a graphic interpretation of contour of the mountain ranges with a striking resemblance to five fingers.

Diagnosis.

Flexicrurum wuzhishanense sp. nov. strongly resembles F. qishi sp. nov. Males of F. wuzhishanense sp. nov. can be distinguished by a longer bulbal apophysis (Fig. 2D) (vs shorter bulbal apophysis in F. qishi sp. nov.), the bulbal apophysis which is further from embolus (Fig. 2B) (vs bulbal apophysis and embolus nearer each other (Fig. 6B), simple protruded conductor comprises only a single part (Fig. 2B) (vs a rather slender conductor comprising two parts, resembling a broken ring in F. qishi sp. nov. (Fig. 6A, B)), the bulb with scattered black spots (Fig. 2A) (vs absence of scattered black spots on bulb of F. qishi sp. nov. (Fig. 6A)); females can be distinguished by a rather broad dome-shaped epigastric area (Fig. 1B) (vs a rather plump, triangular epigastric area in F. qishi sp. nov. (Fig. 5B)), spermathecae can be distinguished by a pair of lobed ducts laterally connected with bow-tie-shaped spermathecae (Fig. 1A) (vs a pair of spermathecae resembling the structure of a human uterus in F. qishi sp. nov. (Fig. 5A)).

Description.

Male (Holotype). Total length 2.46; carapace 0.96 long, 0.94 wide; abdomen 1.50 long, 0.64 wide. Carapace round and brown, with three longitudinal dark brown bands, the middle band is 2 times wider than the lateral bands (Fig. 1C). Fovea shallow and dark brown. Anterior part of thoracic region distinctly elevated. Eye sizes and interdistances: ALE 0.09, ME 0.08, PLE 0.06; ALE–ALE 0.30, ME–ME 0.16, PLE–PLE 0.32, ALE–ME 0.14, PLE–ME 0.18, ALE–PLE 0.12. Chelicerae brown. Cheliceral promargin with lamina of three triangular extensions and no teeth, retromargin with two small teeth (Fig. 8A). Clypeus slanting 0.3 high, with dark brown trident and two pale areas laterally. Endites dark brown. Labium slanting and dark brown. Sternum circular with brown complex pattern delimiting a medial small pale spot anteriorly. Abdomen elongated, anterior of ventrum with pair of circular pale areas and dome-shaped epigastric area, posterior with random irregular dark brown spots. Legs uniformly brown; measurements: missing (detached from specimens, sequence of legs cannot be differentiated). Palp (Fig. 2 A–D): femur slender swollen at the base, patella swollen and angled ventrally (Figs 1C, 2C), tibia more slender than femur, distally darker, cymbium pale, darker distally, with strong lateral protrusion darker distally, bearing posterolateral cymbial apophysis with two bulges (Fig. 2D); bulb brown and pyriform, with scattered dark spots, bearing a pointed laminar apophysis, a protruded conductor and embolus distally; embolus slender, hook-shaped, adjacent to laminar apophysis and conductor (Fig. 2B).

Female (Paratype). General features and coloration similar to male (Fig. 1 D–E). Measurements: total length 2.12; carapace 0.75 long, 0.78 wide; abdomen 1.37 long, 0.93 wide. Eye sizes and interdistances: ALE 0.09, ME 0.06, PLE 0.08; ALE–ALE 0.30, ME–ME 0.14, PLE–PLE 0.32, ALE–ME 0.14, PLE–ME 0.18, ALE–PLE 0.15. Clypeus 0.35 high. Leg measurements: I missing, II missing, III missing, IV 7.38 (1.92, 0.31, 2.03, 2.03, 1.09). Internal genitalia: a pair of lobe-shaped ducts connected with a bow-tie-shaped spermathecae, divided by a distinct pair of vertical ducts with a pair of club-shaped ducts anteriorly (Fig. 1A).

Distribution.

Known only from the type locality (Fig. 9).