Ryojius lianghekouens Irfan, Zhou, Peng & Zhang, 2025, sp. n.
Creators: name: Irfan, Muhammad
name: Zhou, Gu-Chun
name: Peng, Xian-Jin
name: Zhang, Zhi-Sheng
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Ryojius
Ryojius lianghekouens

description: Ryojius lianghekouens i s Irfan, Zhang & Peng, sp. n.
(两Ŝ口ƋĀe)
Figures 204, 205, 313, 315
Types. Holotype ♀ (HNU–HN– IV–1718), CHINA, Hunan Prov.: Ningxiang Co., Huaminglou Town, Tanzi Vill., 28.032005°N, 112.640872°E, 72 m, 09.V.2017, G.C. Zhou et al. leg. Paratypes: 1♀, Hengyang City, Nanyue District, Hengshan NNR, Guanjing Villa, 27.290263°N, 112.70072°E, 1186 m, 19.I.2018, G.C. Zhou et al. leg. (HNU–HNHS–18–10); 1♀, Hengyang City, Nanyue District, Hengshan NNR, Hu Heyun Tomb, 27.26710°N, 112.71825°E, 389 m, 19.I.2018, G.C. Zhou et al. leg. (HNU–HNHS–18–12); Hubei Prov.: 3♀, Enshi Co., Xuaneng, Changtanghe Town, Lianghekou Vill., 29.99053°N, 109.73879°E, 965 m, 13.V.2017, G.C. Zhou et al. leg. (HNU–HB– IV–1701); 1♀, Enshi Co., Xuaneng, Changtanghe Town, Lianghekou Vill., 30.00166°N, 109.74093°E, 1234 m, 14.V.2017, G.C. Zhou et al. leg. (HNU–HB– IV–1703); 2♀, Enshi Co., Huangjindong Town, Maliuxi Vill., 30.03902°N, 109.14274°E, 1114 m, 19.V.2017, M. Irfan & G.C. Zhou leg. (HNU–HB– IV–1715); 1♀, Xuanen Co., Shadaogou Town, Qizimei Mountain, 29.706342°N, 109.75642°E, 1155 m, 30.IV.2016, W. Liu et al. leg.
Etymology. The specific epithet is derived from type locality; adjective.
Diagnosis. The female of Ryojius lianghekouens i s sp. n. resembles that of R. nanyuensis in having the similar longer than wide dorsal part of scape, the stretcher and the posterior median plate of epigyne (Figs 204A–D; Figs 207A–D; Tu, Saaristo & Li, 2006 fig. 18), but can be distinguished by the posterior margin of basal part of scape V-shaped in R. lianghekouens i s sp. n. (Figs 204A– D; vs. arch-shaped).
Description. Female (holotype, Figs 207A, B): Total length: 1.62. Carapace 0.75 long, 0.57 wide, light brown, cervical and radial grooves distinct Clypeus 0.28 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum longer than wide, yellowish grey with microsetae. Eyes: AER recurved, PER straight, slightly wider. Eye sizes and interdistances:AME 0.04, ALE 0.05, PME 0.05, PLE 0.06, AME–AME 0.01, PME–PME 0.04, AME–ALE, 0.03, PME–PLE 0.04, AME–PME 0.04, ALE–ALE 0.22, PLE–PLE 0.26, ALE–PLE contiguous. Length of legs: I 1.95 (0.58, 0.66, 0.37, 0.34), II 1.78 (0.54, 0.62, 0.36, 0.26), III 1.59 (0.47, 0.48, 0.33, 0.31), IV 1.97 (0.59, 0.68, 0.41, 0.29). TmI 0.32 and TmIV absent. Tibial spine formula: 2-2-2-2. Opisthosoma 1.04 long, 0.68 wide, oval, pale, posteriorly with two black chevrons; ventral side pale with black patches.
Epigyne (Figs 204A–D): Potruding; characterised by conspicuosly wide, posteriorly projecting scape, posterior end of basal part of scape (BS) V-shaped, dorsally bearing narrow tongue-shaped stretcher (ST). Distal part of scape (DPS) longer than wide with small lateral pockects (LP). Posterior median plate (PMP) rectangular. spermathecae (S) globular, situates at the apeces.
Male. Unknown.
Distribution. Known from type localities (Hubei and Hunan Provinces, Figs 313, 315).
description: Published as part of Irfan, Muhammad, Zhou, Gu-Chun, Peng, Xian-Jin & Zhang, Zhi-Sheng, 2025, Survey of Linyphiidae spiders (Arachnida: Araneae) from some Oriental Regions of China, pp. 1-248 in Megataxa 15 (1) on pages 155-157, DOI: 10.11646/megataxa.15.1.1, http://zenodo.org/record/14985176