Ryojius fanjingshanensis Irfan, Zhang & Peng, 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 fanjingshanensis

description: Ryojius fanjingshanensis Irfan, Zhang & Peng, sp. n.
(ẍḁƜƋĀe)
Figures 199–201, 310
Types. Holotype ♂ (HNU–GZ– IV–1715), GuizhouProv.: Tongren City, Songtao Co., Wuluo Town, Taohuayuan Vill., Fanjingshan NNR, 28.00130°N, 108.80578°E, 1160 m, 06.XI.2017, G.C. Zhou leg. Paratypes: 1♀, with same data as for holotype male (HNU–GZ– IV–1715).
Etymology. The specific epithet is derived from type locality; adjective.
Diagnosis. Ryojius fanjingshanensis sp. n. resembles R. fodingshanensis sp. n. in having the similar radix, lamellacharacteristicainmalepalpandstretcherofepigyne (Figs 199A–D, 200A–C; Figs 202A–D, 203A, B), but can be distinguished by at the proximal end of distal arm of paracymbium with depression in R. fanjingshanensis sp. n. (Figs 199A–D), vs. the distal arm tip with knob in R. fodingshanensis sp. n. (Figs 202A–D); apex of embolus forked in prolateral view in R. fanjingshanensis sp. n. (Figs 199A–D), vs. finger-shaped in R. fodingshanensis sp. n. (Figs 202A–D); dorsal tibial apophysis leaf-shaped in dorsal view in R. fanjingshanensis sp. n. (Figs 199A– D), vs. beak-shaped in R. fodingshanensis sp. n. (Figs 202A–D). The posterior margin of basal part of scape wave-like in epigyne in R. fanjingshanensis sp. n. (Figs 200A–C), vs. V-shaped in R. fodingshanensis sp. n. (Figs 203A, B).
Description. Male (holotype, Figs 201A, B): Total length: 1.94. Carapace 0.87 long, 0.69 wide, yellowish brown, cervical and radial grooves distinct. Clypeus 0.17 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum longer than wide, yellowish green with microsetae. Eyes: AER recurved, PER straight, slightly wider. Eye sizes and interdistances: AME 0.04, ALE 0.06, PME 0.06, PLE 0.06, AME–AME 0.03, PME–PME 0.05, AME–ALE, 0.03, PME–PLE 0.05, AME–PME 0.05, ALE–ALE 0.25, PLE–PLE 0.28, ALE–PLE 0.01. Length of legs: I 2.4 (0.72, 0.79, 0.52, 0.37), II 2.17 (0.67, 0.69, 0.45, 0.36), III 1.84 (0.57, 0.59, 0.39, 0.29), IV 2.34 (0.69, 0.78, 0.48, 0.39). Tibial spine formula: 2-2-2-2. TmI 0.32 and TmIV absent. Opisthosoma 1.06 long, 0.70 wide, oval, dusky grey, posteriorly with two chevrons; ventral side dusky grey with green patches.
Palp(Figs199A–D):Femur unmodified,almost longer than patella and tibia. Patella as long as tibia, ventrally grooved, with a long dorsal spine. Tibia conical, with one retrolateral and one dorsal trichobothria, dorsal tibial apophysis (DTA) strongly sclerotized, pointing laterally in dorsal view; cymbium unmodified, retrolateral margin with a shallow depression at the base, oval in dorsal view; paracymbium (PC) strongly scleortized, distal arm with a depression at proximal end, distal tip thumb-shaped with blunt end; distal suprategular apophysis (DSA) small covered by the tegulum with narrow hook-shaped dorsal tip. Radix (R) arch-shaped. Lamella characteristica (LC) with 2 branches extending upward. Terminal apophysis (TA) wide, with broad tip with blunt end. Embolus conspicuously large, posteriorly curved about semicircle, C-shaped, apex strongly sclerotized, bifurcated; thumb short covered by the terminal apophysis; embolus proper (EP) with pointed end.
Female (one of the paratypes, Figs 201C, D): Total length: 2.11. Carapace 0.83 long, 0.63 wide, yellow, cervical and radial grooves distinct. Clypeus 0.17 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum longer than wide, yellow with microsetae. Eyes: AER recurved, PER straight, slightly wider. Eye sizes and interdistances:AME 0.04, ALE 0.06, PME 0.04, PLE 0.06, AME–AME 0.02, PME–PME 0.06, AME– ALE, 0.03, PME–PLE 0.04, AME–PME 0.04, ALE–ALE 0.27, PLE–PLE 0.29, ALE–PLE 0.01. Length of legs: I 2.26 (0.68, 0.77, 0.45, 0.36), II 2.02 (0.62, 0.65, 0.40, 0.35), III 1.73 (0.51, 0.54, 0.37, 0.31), IV 2.12 (0.63, 0.71, 0.42, 0.36). Tibial spine formula: 2-2-2-2. TmI 0.31 and TmIV absent. Opisthosoma 1.28 long, 0.82 wide, oval, dusky grey, posteriorly with two chevrons; ventral side pale.
Epigyne (Figs 200A–C): Protruding; characterised by conspicuosly wide, posteriorly projecting basal part of scape (BS), posterior margin wave-like, dorsally bearing narrow tongue-shaped stretcher (ST). Distal part of scape (DPS) widened posteriorly with small lateral pockects. Posterior median plate (PMP) rectangular. Spermathecae (S) globular, situates at the apeces.
Distribution. Known only from the type locality (Guizhou Province, Fig. 310).
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 page 152, DOI: 10.11646/megataxa.15.1.1, http://zenodo.org/record/14985176