Walckenaeria yanglinensis 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
Walckenaeria
Walckenaeria yanglinensis

description: Walckenaeria yanglinensis Irfan, Zhang & Peng, sp. n.
(Ṟųĩe)
Figures 285–287, 315
Types. Holotype ♂ (HNU–HN– IV–1707), CHINA, Hunan Prov.: Ningxiang Co., Huaminglou Town, Yanglin Vill., 28.087272°N, 112.67114°E, 125 m, 09. V.2017, G.C. Zhou et al. leg. Paratypes: 1♀, with same data as for holotype (HNU–HN– IV–1707); 1♀, Shaoyang City, Chengbu Co., Rulin Town, Daqiao Vill., 26.34077°N, 110.27790°E, 527 m, 08.XI.2017, G.C. Zhou leg. (HNU– HN– IV–1773).
Etymology. This specific species name derived from the type locality; adjective.
Diagnosis.Walckenaeriayanglinensis sp.n. resembles W. ichifusaensis in having the similar paracymbium and embolus in male palp and epigyne with similar round spermathecae (Figs 285A–D, 286A–C; Saito & Ono 2001, figs 48–52), but can be distinguished by the prolateral tibial apophysis tip bifurcated in W. yanglinensis sp. n. (Figs 285A–D; vs. not bifurcated); tailpiece with blunt tip in W. yanglinensis sp. n. (Fig. 285A; vs. with pointed end). Female can be distinguished by the ventral plate of epigyne posteriorly with a rectangular somewhat like atrium and dorsal plate partly visible in W. yanglinensis sp. n. (Fig. 285A; vs. dorsal plate with evenly broad lip-shaped extension totally exposed in ventral view); spermathecae present at apex on dorsal plate in W. yanglinensis sp. n. (Fig. 285A; vs. present dorso-laterally).
Description. Male (holotype, Figs 287A–C): Total length: 1.81. Carapace 0.82 long, 0.68 wide, yellow, cephalic region elevated 0.17 high and cephalic pits present, fovea, cervical and radial grooves distinct. Clypeus 0.17 high. Chelicerae with two promarginal and five retromarginal teeth. Sternum longer than wide, yellow with microsetae. Eye region densely covered with setae, AER recurved, PER procurved slightly wider than AER. Eye sizes and interdistances: AME 0.04, ALE 0.08, PME 0.08, PLE 0.07, AME–AME 0.02, PME–PME 0.08, AME–ALE, 0.04, PME–PLE 0.13, AME–PME 0.19, ALE–ALE 0.33, PLE–PLE 0.35, ALE–PLE contiguous. Length of legs: I 2.62 (0.79, 0.89, 0.56, 0.38), II 2.29 (0.71, 0.76, 0.49, 0.33), III 2.49 (0.63, 0.66, 0.48, 0.31), IV 2.77 (0.81, 0.92, 0.67, 0.37). TmI 0.26 and TmIV 0.18. Tibial spine formula: 1-1-1-1. Opisthosoma 0.94 long, 0.99 wide, round, grey, with irregular yellow patches.
Palp (Figs 285A–D): Femur unmodified, as long as patella and tibia. Patella three times longer than proximal part of tibia. Tibia with two retrolateral and one dorsal trichobothria, retrolateral tibial apophysis (RTA) stout, tip of dorsal tibial apophysis (DTA) forked; cymbium unmodified; paracymbium (PC) C-shaped, distal arm tip hook-shaped; distal suprategular apophysis (DSA) distal part transparent, curved, protruding upward. Tailpiece (TP) of embolic division sclerotized, strongly curved with blunt tip pointing towards the lateral margin of the cymbium; embolus (E) sclerotized, originates from prolateral margin of the radix, long, curved, protruding upward.
Female (one of paratype, Figs 287D–E): Total length: 1.99. Carapace 0.92 long, 0.73 wide, yellow, fovea, cervical and radial grooves distinct. Clypeus 0.18 high. Chelicerae with two promarginal and five retromarginal teeth. Sternum longer than wide, yellow with microsetae. Eyes: AER recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.05, ALE 0.09, PME 0.07, PLE 0.08, AME–AME 0.01, PME–PME 0.03, AME–ALE, 0.01, PME–PLE 0.03, AME–PME 0.06, ALE–ALE 0.29, PLE–PLE 0.32, ALE–PLE contiguous. Length of legs: I 2.76 (0.83, 0.97, 0.59, 0.37), II 2.66 (0.81, 0.94, 0.56, 0.35), III 2.34 (0.70, 0.80, 0.53, 0.31), IV 2.99 (0.85, 1.06, 0.71, 0.37). TmI 0.24 and TmIV 0.19. Tibial spine formula: 1-1-1-1. Opisthosoma 1.31 long, 0.75 wide, oval, grey, densely covered with fine hairs.
Epigyne (Figs 286A–C): Ventral plate (VP) wider than long, sclerotized; dorsal plate (DP) sclerotized, wider than long, partly visible in ventral view; copulatory opening (CO) present ventro-mesally; copulatory ducts (CD) sinuosus, present dorso-mesally; spermathecae (S) large, round, ball-shaped; fertilization ducts (FD) small, extending mesally.
Distribution. Known only from the type localities (Hunan Province, Fig. 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 217-218, DOI: 10.11646/megataxa.15.1.1, http://zenodo.org/record/14985176