Chrysso bimaculata Yoshida, 1998

Zhang, Bao-Shi & Zhang, Feng, 2012, Two new spider species of the genus Chrysso O. P. - Cambridge, 1882 (Araneae, Theridiidae) in Hainan Island, China, ZooKeys 190, pp. 21-31 : 24

Chrysso bimaculata Yoshida, 1998 Figs 13-17

Chrysso bimaculata Yoshida, 1998: 105, f. 1-6; Yoshida 2003: 125, f. 330-335; Yoshida 2009: 378, f. 203-204.

Material examined.

CHINA, Hainan Island: 1 ♂, 1 ♀, Jianfengling Mountain, 31 May 2009, C. Zhang leg.; 1 ♀, Bawangling Mountain, 6 November 2008, G.X. Han leg.; 1 ♀, Bawangling Mountain, 25 May 2009, C. Zhang leg.; 5 ♀, Limu Mountain, 29 August 2007, G.X. Han leg.; 1 ♂, 3 ♀, Limu Mountain, 21 November 2008, G.X. Han leg.

Description.

Male (one specimen from Jianfengling Mountain) total length 1.40: cephalothorax 0.59 long, 0.54 wide; abdomen 0.81 long, 0.59 wide, 0.54 high. Carapace longer than wide, yellowish. Cervical groove yellowish. Median furrow yellowish and almost triangle. Each eye with a red ring. AER recurved and PER procurved from dorsal view (Fig. 13). Diameters of eyes: AME 0.08, ALE 0.07, PME 0.07, PLE 0.07. Interdistances of eyes: AME–AME 0.08, AME–ALE 0.07, ALE–ALE 0.34, PME–PME 0.08, PME–PLE 0.06, PLE–PLE 0.36, ALE and PLE closed to each other. MOA long 0.18, front width 0.18, back width 0.17. Clypeus 0.16 high and furnished with few short gray setae. Chelicerae armed with sparse black setae, promargin with 2 teeth. Endites, labium and sternum yellowish. Anterior margin of endites armed with gray scopula. Sternum furnished with sparse black setae. Legs yellow, the end of tibia yellow brown. Measurements of legs: leg I 5.10 (1.44, 0.36, 1.22, 1.58, 0.50), II 3.07 (0.99, 0.32, 0.63, 0.77, 0.36), III 1.81 (0.50, 0.23, 0.45, 0.36, 0.27), IV 3.20 (1.17, 0.27, 0.63, 0.77, 0.36). Leg formula: 1423.

Abdomen oval, armed with gray setae. Dorsum yellowish, posterior part with two pairs of white patches, lateral part armed with three pairs of black patches and several black stripes (Fig. 13). Venter yellowish. Spinnerets yellowish.

Embolus of male palp small, thin and wind; conductor wind, membranous; median apophysis big, posterior part with a small tuber from prolateral view (Figs 14-15).

Female (one specimen from Jianfengling Mountain) total length 1.80: cephalothorax 0.63 long, 0.54 wide; abdomen 1.08 long, 0.95 wide, 1.04 high. Diameters of eyes: AME 0.08, ALE 0.07, PME 0.07, PLE 0.07. Interdistances of eyes: AME–AME 0.09, AME–ALE 0.03, ALE–ALE 0.35, PME–PME 0.10, PME–PLE 0.07, PLE–PLE 0.38, ALE and PLE closed to each other. MOA long 0.17, front width 0.17, back width 0.20. Clypeus 0.16 high. Measurements of legs: leg I 4.73 (1.35, 0.27, 1.17, 1.44, 0.50), II 2.81 (0.90, 0.23, 0.59, 0.77, 0.32), III 1.95 (0.63, 0.18, 0.32, 0.50, 0.32), IV 2.94 (0.95, 0.27, 0.59, 0.77, 0.36). Leg formula: 1423. Other characters as in holotype.

Female genitalia lightly sclerotized, median part with a circular atrium; spermathecae oval; the copulatory ducts very short (Figs 16-17).

Variation.

The amount of white patches and black patches of dorsal abdomen variated from two pairs to three pairs. Males total body length of some species examined from 1.40-1.55, females total length from 1.68-1.82.

Distribution.

China (Hainan), Japan.