Walckenaeria yanglinensis 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 : 217-218

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 ).

Figures

FIGURE 285. Walckenaeria yanglinensis sp. n., male holotype. A Palp, prolateral view; B Palp, retrolateral view; C Palp, dorsal view; D Palp, ventral view. Abbreviations: DSA—distal suprategular apophysis; DTA—dorsal tibial apophysis; E—embolus; PC—paracymbium; PT—protegulum; R—radix; ST—subtegulum; SPT—suprategulum; T—tegulum; TP—tailpiece of radix.

FIGURE 286. Walckenaeria yanglinensis sp. n., female paratype. A, B Epigyne, ventral view; C Vulva, dorsal view.Abbreviations: CD—copulatory duct; CO—copulatory opening; DP—dorsal plate; FD—fertilization duct; S—spermatheca; VP—ventral plate.

FIGURE 287. Walckenaeria yanglinensis sp. n., male holotype (A–C) and female paratype (D, E–F). A, D Habitus, dorsal view; B Habitus, lateral view; C, E Habitus, ventral view.

FIGURE 315. Distribution of Linyphiidae species in Hunan Prov.: 1. Acanoides cornutus sp. n.; 2. Acanoides ningxiangensis sp. n.; 4. Auriculaiana yongshunensis sp. n.; 5. Baryphyma xiaoxiense sp. n.; 6. Bathyphantes paracymbialis Tanasevitch, 2014; 7. Bathyphantes pseudogracilis sp. n.; 8. Bifurcia ramosa (Li & Zhu, 1987); 9. Bolyphantes arcuatus sp. n; 10. Bolyphantes gladius sp. n.; 11. Capsulia tianmushana (Chen & Song, 1987); 12. Dicristatus cordatus sp. n.; 13. Diplocephalus circularis sp. n.; 14. Drapetisca boletus sp. n.; 15. Drapetisca nanpingensis sp. n.; 16. Drapetisca yuelushanensis sp. n.; 17. Erigone prominens Bösenberg & Strand, 1906; 18. Frontinella zhui Li & Song, 1993; 19. Gnathonarium dentatum (Wider, 1834); 20. Gnathonarium gibberum Oi, 1960; 21. Oedothorax fortis sp. n.; 22. Tapinocyba sulcata sp. n.; 23. Himalaphantes azumiensis (Oi, 1979); 24. Hylyphantes graminicola (Sundevall, 1830); 25. Kaestneria bicultrata Chen & Yin, 2000; 26. Lepthyphantes frondeus sp. n.; 27. Microlinyphia zhejiangensis (Chen, 1991); 3. Microneta acutalis sp. n.; 28. Nematogmus sanguinolentus (Walckenaer, 1841); 29. Nippononeta alpina (Li & Zhu, 1993); 30. Nippononeta coreana (Paik, 1991); 31. Oia baiyunensis sp. n.; 32. Oia lata sp. n.; 33. Oia yinae sp. n.; 34. Oilinyphioides triangularis sp. n.; 35. Paikiniana lurida (Seo, 1991); 36. Parameioneta bilobata Li & Zhu, 1993; 37. Prosoponoides sinensis (Chen, 1991); 38. Ryojius lianghekouensis sp. n.; 39. Ryojius nanyuensis (Chen & Yin, 2000); 40. Scotinotylus longiprojectus sp. n.; 41. Shaanxinus insectus sp. n.; 42. Shaanxinus longiembolus sp. n.; 43. Sinolinyphia henanensis (Hu, Wang & Wang, 1991); 44. Syedra yuelushanensis sp. n.; 45. Tenuiphantes taipingensis sp. n.; 46. Ummeliata feminea (Bösenberg & Strand, 1906); 47. Ummeliata insecticeps (Bösenberg & Strand, 1906); 48. Walckenaeria xingdouensis sp. n.; 49. Walckenaeria extenuata sp. n.; 50. Walckenaeria yanglinensis sp. n.; 51. Wuliphantes tongluensis (Chen & Song, 1988); 52. Yuelushannus diaotangensis sp. n.; 53. Yuelushannus jinyuanensis sp. n.; 54. Yuelushannus wenfengensis sp. n..