Oia yinae 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 : 130-137

Oia yinae Irfan, Zhang & Peng , sp. n.

(ƿĸ伊亚e)

Figures 174–176 , 307 , 315

Types. Holotype ♂ ( HNU–CQ– IV–1718 ), CHINA, Chongqing: Youyang Co., Taohuayuan Scenic Spot , 28.85096°N, 108.75037°E, 995 m, 23.VII.2017, M. Irfan & G.C. Zhou leg. Paratypes: 3♂ 7♀, with same data as for holotype ( HNU–CQ– IV–1718 ) ; 1♀, Chongqing, Youyang Co., Taohuayuan Scenic Spot , 28.852636°N, 108.754442°E, 954 m, 26.V.2017, G.C. Zhou et al. leg. ( HNU–CQ– IV–1709 ); Hunan Prov.: 2♂ 2♀, Changsha City, Yuelu District, Yuelu Mountain , 28.19012°N, 112.94269°E, 141 m, 06.XI.2016, Irfan M. & Zhou G.C .; 3♀, Ningxiang Co., Huaminglou Town, Yanglin Vill. , 28.100208°N, 112.658819°E, 189 m, 10.V.2017, G.C. Zhou et al. leg. ( HNU–HN– IV–1707 ) ; 1♂, Liuyang City, Mudu Vill., Daweishan NFP , 28.43567°N, 114.03376°E, 286 m, 14.I.2018, G.C. Zhou et al. leg. ( HNU–HNDWS– 18–04 ) .

Etymology. The epithet is the patronym in honor of Prof. Yin C.M. (late), who contributed to the taxonomy of Chinese spiders; noun in gentive case.

Diagnosis. Oia yinae sp. n. resembles O. imadatei in having tibia with a long, thick spine and all the parts of epigyne with the similar pattern ( Figs 174A–E , 175A–C ; Lv et al. 2015, figs 2A–E), and can be distinguished by the paracymbium C-shaped in O. yinae sp. n. ( Figs 174B, D ; vs. J-shaped); embolus long, thick, sclerotized, arises from the ventral side of the radix, strongly curved almost touches the retrolateral margin of cymbium in O. yinae sp. n. ( Figs 174A–E ; vs. short, arises from the prolateral side of the palp); distal tip of dorsal tibial apophysis beak-shaped in O. yinae sp. n. ( Figs 174B, D ; vs. sickle-shaped). Copulatory ducts anteriorly protruding above the spermathecae in O. yinae sp. n. ( Figs 175A–C ; vs. retained below the spermathecae).

Description. Male (holotype, Figs 176A–C ): Total length: 1.07. Carapace 0.53 long, 0.44 wide, yellow, cephalic region elevated, ocular quad triangular, mid dorsally three setae, cervical and radial grooves distinct. Clypeus 0.16 high. Chelicerae with five promarginal and five retromarginal teeth. Sternum longer than wider, yellow with microsetae. Eyes: AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.02, ALE 0.04, PME 0.03, PLE 0.04, AME–AME 0.005, PME–PME 0.01, AME–ALE, 0.01, PME–PLE 0.01, AME–PME 0.05, ALE–ALE 0.11, PLE–PLE 0.13, ALE– PLE contiguous. Length of legs: I 1.35 (0.43, 0.48, 0.22, 0.22), II 1.20 (0.38, 0.43, 0.20, 0.19), III 1 (0.31, 0.32, 0.20, 0.17), IV 1.30 (0.41, 0.44, 0.25, 0.20). TmI present and TmIV absent. Tibial spine formula: 1-1-1-1. Opisthosoma 0.69 long, 0.46 wide, oval, dusky grey with irregular green patches, ventral side dusky grey to light green.

Palp ( Figs 174A–E ): Femur unmodified, almost longer than both patella and tibia. Patella 1/2 length of the cymbium; the tibia mid dorsally with a thick, robust spine, with one dorsal trichobothria, dorsal tibial apophysis (DTA) sclerotized,with blunt end; cymbium conical, broad at distal end; paracymbium (PC) semicircular with blunt tip.. Median membrane (MM) arises from the ventral side of the radix, broad, curved, covering most of the internal structures; tailpiece (TP) of embolic division sclerotized, slightly curved, pointing towards tibia; embolus (E) long, thick, sclerotized, arises from the ventral side of the radix, strongly curved almost touches the retrolateral margin of cymbium.

Female (one of paratype, Figs 176D–F ): Total length: 1.19. Carapace 0.52 long, 0.39 wide, yellow, cephalic region elevated, ocular quad triangular, mid dorsally three setae, cervical and radial grooves distinct. Clypeus 0.16 high. Chelicerae with five promarginal and six retromarginal teeth. Sternum longer than wider, yellow with microsetae. Eyes: AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.03, ALE 0.04, PME 0.04, PLE 0.04, AME–AME 0.01, PME–PME 0. 03, AME–ALE, contiguous, PME– PLE 0.01, AME–PME 0.03, ALE–ALE 0.14, PLE–PLE 0.16, ALE–PLE contiguous. Length of legs: I 1.14 (0.38, 0.39, 0.18, 0.19), II 1.06 (0.35, 0.36, 0.17, 0.18), III 0.88 (0.27, 0.29, 0.16, 0.16), IV 1.11 (0.36, 0.41, 0.16, 0.18). TmI present and TmIV absent. Tibial spine formula: 1-1- 1-1. Opisthosoma 0.77 long, 0.55 wide, oval, dusky grey with irregular yellow patches, ventral side dusky grey with green patches.

Epigyne ( Figs 175A–C ): Ventral plate (VP) longer than wide, concave, posterior end round, relatively broad than anterior end; copulatory opening (CO) present anteriorly on ventral plate; copulatory ducts (CD) long, anteriorly protruding above the spermathecae; spermathecae (S) globular, present dorso-laterally at the anterior end of epigyne; fertilization ducts (FD) small, extending mesally.

Distribution. Known only from the type localities (Chongqing and Hunan Province, Figs 307 , 305 ).

Figures

FIGURE 174. Oia yinae sp. n., male holotype (A–D), male (one of paratypes, E). A Palp, prolateral view; B Palp, retrolateral view; C Palp, ventral view; D Palp, dorsal view; E Embolic division, dorsal view. Abbreviations: DSA—distal suprategular apophysis; DTA—dorsal tibial apophysis; E—embolus; MM—median membrane; PC—paracymbium; SPT—suprategulum; ST—subtegulum; T—tegulum; TP—tailpiece of radix.

FIGURE 175. Oia yinae 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 176. Oia yinae sp. n., male holotype (A–C) and female paratype (D–F). A, D Habitus, dorsal view; B, E Habitus, lateral view; C, F Habitus, ventral view.

FIGURE 305. Yuelushannus wenfengensis sp. n., female holotype.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 307. Distribution of Linyphiidae species in Chongqing: 1. Bathyphantes paracymbialis Tanasevitch, 2014; 2. Diplocephalus circularis sp. n.; 3. Frontinella zhui Li & Song, 1993; 4. Gnathonarium dentatum (Wider, 1834); 5. Gongylidioides acuminatus sp. n.; 6. Gongylidioides ensis sp. n.; 7. Gongylidium uncatum sp. n.; 8. Himalaphantes azumiensis (Oi, 1979); 9. Hylyphantes graminicola (Sundevall, 1830); 10. Indophantes wushanensis Irfan, Wang & Zhang, 2023; 11. Lepthyphantes frondeus sp. n.; 12. Wulinggone qizimeiensis sp. n.; 13. Nematogmus ligulatus sp. n.; 14. Nematogmus sanguinolentus (Walckenaer, 1841); 15. Nippononeta alpina (Li & Zhu, 1993); 16. Nippononeta coreana (Paik, 1991); 17. Oia yinae sp. n.; 18. Oilinyphia xinqiaoensis sp. n.; 19. Oilinyphioides triangularis sp. n.; 20. Prosoponoides sinensis (Chen, 1991); 21. Scotinotylus guizhouensis sp. n.; 22. Sinolinyphia henanensis (Hu, Wang & Wang, 1991); 23. Syedra yuelushanensis sp. n.; 24. Ummeliata feminea (Bösenberg & Strand, 1906); 25. Ummeliata insecticeps (Bösenberg & Strand, 1906); 26. Walckenaeria sinuosa sp. n.; 27. Wuliphantes tongluensis (Chen & Song, 1988).

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..