Lenis Irfan, Zhang & Peng

Irfan, Muhammad, Zhou, Gu-Chun, Peng, Xian-Jin & Zhang, Zhi-Sheng, 2025, Survey of Linyphiidae spiders (Arachnida: Araneae) from some Oriental Regions of China, Megataxa 15 (1), pp. 1-248 : 91-92

Lenis Irfan, Zhang & Peng , gen. n.

(NJeø)

Figures 121–124 , 313

Type species: Lenis longiabdominis sp. n.

Etymology. The genus name is derived from Latin adjective “lenis” meaning “soft” referring to the embolus not sclerotized in male palp. Gender masculine.

Diagnosis. The new genus is closely related to Linyphia and Microlinyphia in having the similar paracymbium; lamella with two to three projections and the spiral ducts in epigyne ( Figs 121A–D , 122A, B , 123A–D ; Helsdingen 1969, figs 21–28; Helsdingen 1970, figs 1–6), but it can be distinguished by the terminal apophysis reduced, hidden on unexpended palp same as in M. pusilla ( Figs 121A–D , 122A, B ; vs. conspicuous, distinct and prominently visible on unexpended palp in L. triangularis ). Embolus small similar as in L. triangularis ( Figs 121A, B, D , 122A, B ; vs. long, whip-like in M. pusilla ). Epigyne with broad median plate, ventral socket absent in scape in new genus ( Figs 123A–D ; vs. scape with ventral socket both in Linypia and Microlinyphia ).

Description. Same as for type species.

Composition. Lenis gen. n. belongs to the subfamily Linyphiinae and is erected here as a monotypic genus to accommodate L. longiabdominis sp. n..

Distribution. Known only from the type locality ( Fig. 313 ).

Figures

FIGURE 121. Lenis longiabdominis sp. n., male holotype. A Palp, prolateral view; B Palp, retrolateral view; C Palp, ventral view; D Palp, dorsal view. Abbreviations: DSA—distal suprategular apophysis; E—embolus; LC—lamell; MM—median membrane; PC—paracymbium; ST—subtegulum; T—tegulum; ta—tegular apophysis.

FIGURE 122. Lenis longiabdominis sp. n., male paratype palp. A Embolic division, prolateral view; B Embolic division, retrolateral view; C Chelicerae, lateral view. Abbreviations: E—embolus; L—lamella; MM—median membrane.

FIGURE 123. Lenis longiabdominis sp. n., female paratype. A, C Epigyne, ventral view; B Epigyne, lateral view; D Vulva, dorsal view.Abbreviations:CO—copulatory opening; EG—entrance groove; FD—fertilization duct; TP—turning point; S—spermatheca; SC—scape; SD—spiral duct; SF—spiral fold.

FIGURE 124. Lenis longiabdominis sp. n., male holotype (A–C) and female paratype (D, E). A, D Habitus, dorsal view; B Habitus, lateral view; C, E Habitus, ventral view.

FIGURE 313. Distribution of Linyphiidae species in Hubei Prov.: 19. Lepthyphantes ellipticus sp. n.; 20. Lepthyphantes frondeus sp. n.; 21. Linyphia songziyuanensis sp. n.; 22. Lenis longiabdominis sp. n.; 23. Wulinggone qizimeiensis sp. n.; 24. Nematogmus ligulatus sp. n.; 25. Nematogmus sanguinolentus (Walckenaer, 1841); 26. Nippononeta coreana (Paik, 1991); 27. Oedothorax collinus Ma & Zhu, 1991; 28. Paikiniana lurida (Seo, 1991); 29. Parameioneta bilobata Li & Zhu, 1993; 30. Wulingnus furcatus sp. n.; 31. Wulingnus inversus sp. n.; 32. Platyspira tanasevitchi Song & Li, 2009; 33. Prosoponoides sinensis (Chen, 1991); 34. Ryojius lianghekouensis sp. n.