Flexicrurum qishi 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 : 20

Flexicrurum qishi Li & Li sp. nov. Figs 5, 6, 8C, 9

Types.

Holotype: ♂ (IZCAS), China, Hainan Island, Tunchang County, Datong Village, Mountain Wolong, 19°27.5450'N, 110°7.3150'E, 248 m, 06.VII.2014, Li F. and Wang X. leg.; Paratype: 1♀ (IZCAS), same data as holotype.

Etymology.

The species name is a noun in apposition derived from the Chinese pinyin “qíshì” (knight) and refers to the ventral view of the bulb which resembles a piece in international chess game representing a knight (Fig. 6A).

Diagnosis.

The species is similar to Flexicrurum wuzhishanense sp. nov. Diagnostic features are discussed under F. wuzhishanense sp. nov.

Description.

Male (Holotype). Total length 2.45; carapace 1.25 long, 0.75 wide; abdomen 1.20 long, 0.68 wide. Carapace round and brown, with three longitudinal dark brown bands, the middle band is 2 times wider than the lateral bands (Fig. 5C). Fovea shallow and dark brown. Anterior part of thoracic region distinctly elevated. Eye sizes and interdistances: ALE 0.08, ME 0.06, PLE 0.05; ALE–ALE 0.28, ME–ME 0.15, PLE–PLE 0.30, ALE–ME 0.16, PLE–ME 0.18, ALE–PLE 0.13. Chelicerae brown. Cheliceral promargin with lamina of three triangular extensions and no teeth, retromargin with two small teeth (Fig. 8C). Clypeus slanting 0.20 high, medially dark brown and two pale areas laterally. Endites dark brown. Labium slanting and dark brown. Sternum circular with brown complex pattern delimiting a 1/3 medial small pale spot anteriorly and bottom margin. Abdomen elongated, dorsum anterior 2/3 with random dark brown spots, posterior 1/3 with horizontal dark brown striated pattern medially, ventrum anterior half with pair of circular pale areas and ovoid epigastric area, posterior half with random irregular dark brown spots. Legs uniformly brown; measurements: missing (detached from specimens, sequence of legs cannot be differentiated). Palp (Fig. 6 A–D): femur slender, swollen at the base, patella swollen and angled ventrally (Figs 5C, 6C), tibia swollen and darker distally, cymbium pale, darker distally, with strong lateral protrusion darker distally, bearing posterolateral cymbial apophysis with two bulges (Fig. 6D); bulb pale brown and pyriform, bearing a pointed laminar apophysis, a slender bulbal apophysis adjacent to embolus which is located further away from conductor; conductor comprising two parts (two slender conductors circling inwards) resembling a broken ring; embolus hook-shaped, curving distally (Fig. 6B).

Female (Paratype). General features and coloration similar to male (Fig. 5 D–E). Measurements: total length 2.15; carapace 0.75 long, 0.78 wide; abdomen 1.40 long, 0.93 wide. Eye sizes and interdistances: ALE 0.09, ME 0.06, PLE 0.05; ALE–ALE 0.29, ME–ME 0.13, PLE–PLE 0.31, ALE–ME 0.16, PLE–ME 0.18, ALE–PLE 0.14. Clypeus 0.23 high. Leg measurements: I missing, II missing, III missing, IV 6.65 (1.80, 0.25, 1.80, 1.87, 0.93). Internal genitalia: a pair of spermathecae resembling the structure of human uterus (distinct pair of lobe-shaped ducts hanging directed posteriorly, medially with a pair of vertical ducts bearing a curvy, flat duct posteriorly) (Fig. 5A).

Distribution.

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