Hylyphantes nigritus ( Simon, 1881 )

Tu, Lihong & Li, Shuqiang, 2003, A Review Of The Spider Genus Hylyphantes (Araneae: Linyphiidae) From China, Raffles Bulletin of Zoology 51 (2), pp. 209-214 : 209-211

Hylyphantes nigritus ( Simon, 1881)

( Fig. 1 )

Erigone nigrita Simon, 1881: 233 .

Material examined. – 2 males and 3 females (IZCAS-Tu0037), Lake Jingyuetan , Changchun City (43.9 N, 125.3 E), Jilin

Province, 4 Jun.1987; 1 male and 1 female ( ZRC), Laotuding Town , Qingyuan County (42.1 N, 124.9 E), Liaoning Province , 12-13 Jun.1989; 3 males ( IZCAS), Qingyuan County, Liaoning Province , Jun.1985; 1 female ( IZCAS), Haoping Village, Mt. Taibaishan (33.9 N, 107.7 E), Shaanxi Province , 6 Aug.1989.

Diagnosis. – Smallest in size and darkest in color among the three species of Hylyphantes occurring in China. Male chelicerae without tooth-like process situated on front face (present in other Hylyphantes species), promargin with six teeth, retromargin five ( Fig. 1F ). Tm I 0.64, Tm IV present.

Palp: palpal patella without ventral apophysis) ( Figs. 1A, C ); tibia half shorter than patella, tibia dorsal apophysis small compared with other two species ( Fig. 1E ); embolus with 7 spirals ( Fig. 1B ); distal suprategular apophysis (DSA) is long and band-shaped with a middle tooth inside ( Figs. 1C, D ).

Epigynum: atrium with a septum, copulatory ducts spiral and two copulatory openings visible in ventral view, filled with white exudation ( Figs. 1G, H ).

Habitats. – Hylyphantes nigritus is rare and recorded only from a few localities in China. It lives on herbs and bushes, and at or near humid places.

Distribution. – Palearctic.

Figures

Fig. 1. Hylyphantes nigritus (Simon, 1881). A. left male palp, prolateral view; B. embolus, prolateral view; C. left male palp, retrolateral view; D. embolus division, ventral view; E. palpal tibia, dorsal view; F. left chelicera, frontal view; G. epigynum, ventral view; F. vulva, dorsal view. [Scale bars: 0.1mm; Drawings were based on specimen from Changchun, IZCAS-Tu0037].