The spider genus Prosoponoides (Araneae: Linyphiidae) in China Chen, Qianjun Zhong, Yang Liu, Jie Chen, Jian Zootaxa 2020 2020-05-29 4786 1 23 36 Liu & Chen Chen & Zhong & Liu & Chen 2020 [151,619,513,540] Arachnida Linyphiidae Prosoponoides Animalia Araneae 8 31 Arthropoda species youyiensis sp. nov.   Figs 6–9   Type Materials.Male  holotype, China, Tibetan Autonomous Region: Rikaze City, Nielamu County, Zhangmu Town, near Youyibridge between Chinaand Nepal, 27.97°N, 85.97°E,  30 August 2002, Fengxiang Liuleg. ( CBEE);  Paratypes, 5 females, same data as holotype.   Etymology:The species name is taken from the name of the typelocality, Youyi bridge between Chinaand Nepal; adjective.   Diagnosis:The male of this species can be distinguished from other  Prosoponoidesspecies by the embolic base with a round apophysis nearby ( Fig. 7D) and the rectangular median part of tegulum ( Figs 6C, 7B). The female of  P. youyiensis  n. sp.is similar to  P. sinensein having semi-elliptical atrium with reduced septum, tube-shaped spermathecae located medially and closed with each other, but can it be distinguished by having the parmula almost as wide as long (strongly wider than long in  P. sinense) and by having spiraling copulatory ducts with about one and half coils (while  P. sinensehas two and half coils) ( Figs 5C–E, 6D, 6F–G, 8C–D).   Description. Male ( holotype):Total length: 2.85. Carapace: 1.23 long, 1 wide. Abdomen: 1.5 long, 0.99 wide. Carapace red-brown, unmodified. AME smallest, other eyes subequal. AER recurved, AME-AME shorter than AMEd, AME-ALE about AMEd; PER straight, PME-PME about PMEd, PME-PLE slightly longer than PMEd; ALE and PLE juxtaposed. Chelicerae yellow-brown, stridulatory ridges weak, promargin of fang furrow with two teeth, first one much bigger than second, retromargin with one small tooth. Lengths of legs: I 5.41 (1.49+1.67+1.46+0.79), II 4.83 (1.36+1.47+1.28+0.72), III 2.71 (0.8+0.76+0.69+0.46), IV 3.97 (1.10+1.14+1.08+0.65). Abdomen cylindriform, without tubercle, gray with whitish and black spots laterally and dorsally ( Fig. 8B). Male palp ( Figs 6A–C, 6E, 7): Patella short, with long spine dorsally. Tibia shorter than cymbium, with several long spines on lateral and ventral surfaces. Paracymbium tiny, curved upwardly. Suprategular slightly long, lender, not curved distally. Lamella well-developed, with four projections: lateral one broad, sheet-shaped, with a sharp end curved upwardly, and posterior one short and broad; anterior one small; dorsal one stout. Second membrane small, slightly cuticularized distally. Embolus filiform, with a round apophysis near the base in retrolateral view.  Female ( paratype):Total length: 3.2. Carapace: 1.09 long, 0.97 wide.Abdomen: 1.96 long, 1.48 wide. Carapace yellow-brown, unmodified. AME smallest, other eyes subequal. AER recurved, AME-AME shorter than AMEd, AME-ALE about AMEd; PER straight, PME-PME about PMEd, PME-PLE slightly longer than PMEd; ALE and PLE juxtaposed. Chelicerae yellow-brown, stridulatory ridges weak, promargin of fang furrow with three teeth, first two much bigger than third, retromargin with two equal teeth. Lengths of legs: I 5.64 (1.59+1.73+1.47+0.85), II 4.89 (1.35+1.54+1.27+0.73), III 3.04 (0.88+0.91+0.75+0.5), IV 4.58 (1.32+1.33+1.26+0.67). Other somatic characters same as male ( Fig. 8A). Epigynum ( Figs 6D, 8C): Atrium oval, divided into two openings by septum. Parmula half elliptical, arising from dorsal wall but without connecting with septum, with a small depression at its tip. Vulva ( Figs 6F–G, 8D): Vulva longer than wide; copulatory ducts started from the two atrium openings, with about one and half coils; fertilization duct without coils, directly running downwards from the spermatheca inside the spiral tracing of copulatory duct; spermathecae short, located medially, closed with each other.   Distribution: China( Tibet) ( Fig. 9). 2628392304 2002-08-30 CBEE Fengxiang Liu China Nielamu County 27.97 Tibetan Autonomous Region 740 85.97 Youyi 8 31 1 holotype 2628392303 [151,647,692,719] 2002-08-30 CBEE Fengxiang Liu China Nielamu County 27.97 Tibetan Autonomous Region 740 85.97 Youyi 8 31 5 5 paratype