Oia yinae 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
Oia
Oia yinae

description: 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).
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 130-137, DOI: 10.11646/megataxa.15.1.1, http://zenodo.org/record/14985176