Dysdera dushengi, Lin & Chang & Li, 2020

Dysdera dushengi View in CoL sp. nov. ( Figs 1–6 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 )

Type material. Holotype ♂ (IZCAS-Ar39719), CHINA: Xinjiang Uygur Autonomous Region, Ili Kazak Autonomous Prefecture, 10 km N. of Kekedala City , 44.0244°N, 81.0180°E, elev. 751 m, 06.IV.2019, Sheng Du leg. GoogleMaps Paratypes. 1♂, 1♀ (IZCAS-Ar39720–IZCAS-Ar39721), same data as holotype GoogleMaps .

Etymology. The species is named after Mr. Sheng Du, the collector of the holotype; noun (name) in genitive case.

Diagnosis. Dysdera dushengi sp. nov. is similar to D. pamirica Dunin, 1992 , which has been found only at the ridge of Peter the Great, Central Tajikistan ( 38.7833°N, 70.3000°E, see Dunin, 1992). Males of the two species are similar in: the ratio of the height of the tegulum to the height of the distal division, which is 1: 2 in lateral view, the semi-circular crest, and the posterior leaf-shaped apophysis but can be distinguished from D. pamirica by the tegulum and distal division which are in a straight line in lateral view ( vs. angle between tegulum and distal division approximately 10° in D. pamirica ) and the height of the tegulum to the length of the widest part of the crest is 1:2 ( vs. 1: 1 in D. pamirica ) ( Figs 2 View Figure 2 , 4 View Figure 4 A–B). Females have a similar dorsal arc of the anterior diverticulum but can be distinguished by the spermatheca which are not connected to the dorsal arc of anterior diverticulum ( vs. connected to the dorsal arc of anterior diverticulum in D. pamirica ), and the two extremities of the dorsal arc of the posterior diverticulum are well-developed ( vs. less well developed in D. pamirica ) ( Figs 3 View Figure 3 , 4C View Figure 4 ).

Description. Male ( Figs 1 View Figure 1 A–B, 2, 4A–B). Total length 7.37. Carapace 3.21 long, 2.31 wide. Abdomen 4.25 long, 2.34 wide. Eye sizes and inter-distances: AE 0.20, PLE 0.12, PME 0.12, AE–AE 0.44, PME–PME 0.28, PME–PLE 0.25, AE– PLE 0.28. PLE–PLE 0.52. Chelicerae 2.00 long. Fang 1.40. Legs: I 10.25 (2.88 + 3.85 + 2.88 + 0.64), II 9.40 (2.88 + 3.21 + 2.56 + 0.75), III 6.75 (2.25 + 2.00 + 2.25 + 0.25), IV 8.38 (3.00 + 2.50 + 2.50 + 0.38). Carapace red, smooth, lighter posteriorly, with sparse setae. Clypeus dark red. Chelicerae long, red, with 1 promarginal tooth and 2 retromarginal teeth. Endites and labium red. Sternum colored as endites, with sparse setae. Legs orange. Spination of leg I: femur 3d; leg II: femur 3d; leg III: femur 11–6r, 4–0v, tibia 5–6d, 5–7p, 4v, metatarsus 5–7d, 3–2p; leg IV: femur 3d, 4–2r, tibia 7–4d, 5–4p, metatarsus 6–9d, 2p, 3–0r, 4v. Abdomen oval, dorsum pale yellow, covered with setae.

Bulb ( Figs 2 View Figure 2 , 4 View Figure 4 A–B) three times longer than tegulum; distal division straight in lateral view; crest semicircular, half length of tegulum; lateral sheet well-developed, with an apophysis; anterior apophysis of lateral sheet absent; AL present; posterior apophysis leaf-shaped, perpendicular to tegulum in lateral view, ratio of lateral length to length of tegulum 2: 1.

Female ( Figs 1 View Figure 1 C–D, 3, 4C). Total length 7.69. Carapace 2.80 long, 1.92 wide. Abdomen 4.49 long, 0.96 wide. Eye sizes and inter-distances: AE 0.16, PLE 0.12, PME 0.12, AE–AE 0.40, PME–PME 0.24, PME–PLE 0.25, AE–PLE 0.28. PLE– PLE 0.48. Chelicerae 1.25. Fang 1.17. Legs: I 7.80 (2.20 + 3.00 + 2.00 + 0.60), II 6.74 (2.19 + 2.75 + 1.20 + 0.60), III 6.00 (1.80 + 2.00 + 1.60 + 0.60), IV 6.89 (2.56 + 1.50 + 2.20 + 0.63). Spination of leg I: femur 3d, 3–0p; leg II: femur 2d; leg III: femur 3–0d, 1–0r, tibia 3r, 3–5p, 3–1d, metatarsus 3–6d, 2–3p, 4r, 1–3v; leg IV: femur 7–4r, tibia 4–5p, 3–2d, metatarsus 3– 7d, 2– 1p. Appearance as in male.

Endogyne ( Figs 3 View Figure 3 , 4C View Figure 4 ): Anterior spermatheca with straight lateral wings, four times wider than long, neck of spermatheca visible; dorsal arc of anterior diverticulum ladder-shaped, two times wider than long; terminus of dorsal arc of posterior diverticulum well-developed; ventral wall triangular.

Distribution. Known only from the type locality.

Life history. All specimens of the new species were collected under stones on a rocky massif.