Syedra yuelushanensis 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 : 180-182

Syedra yuelushanensis Irfan, Zhang & Peng , sp. n.

(ḂḆƜĦe)

Figures 235–237 , 307 , 314 , 315

Types. Holotype ♂, CHINA, Hunan Prov.: Changsha City, Yuelu District, Yuelu Mountain , 28.19012°N, 112.94269°E, 141 m, 06.XI.2016, M. Irfan & G.C. Zhou leg. Paratypes: 2♂ 2♀, with same data as for holotype male ; 7♀, Changde City, Taoyuan Co., Shaping Town , Saiyang Vill. , Wuyunjie NNR , 28.60443°N, 110.15544°E, 209 m, 06.VIII.2017, X.J. Peng et al. leg. ( HNU–HN– IV–1734 ) ; 1♂, Changde City, Taoyuan Co., Shaping Town , Saiyang Vill. , Wuyunjie NNR , 28.61471°N, 110.40767°E, 208 m, 06.VIII.2017, X.J. Peng et al. leg. ( HNU–HN– IV–1736 ) ; 3♀, Ningxiang Co., Huaminglou Town, Tanzi Vill. , 28.032005°N, 112.640872°E, 72 m, 09.V.2017, G.C. Zhou et al. leg. ( HNU–HN– IV– 1718 ) ; 2♀, Ningxiang Co., Huaminglou Town, Jinyuan Vill. , 28.1002°N, 112.5277°E, 187 m, 24.X.2017, G.C. Zhou leg. ( HNU–HN– IV–1755 ) ; 1♀, Ningxiang Co., Huaminglou Town, Yanglin Vill. , 28.10020°N, 112.65881°E, 189 m, 10.V.2017, G.C. Zhou et al. leg. ( HNU–HN– IV–1707 ); Chongqing: 2♂ 10♀, Youyang Co., Taohuayuan Scenic Spot , 28.85096°N, 108.75037°E, 995 m, 23.VII.2017, M. Irfan & G.C. Zhou leg. ( HNU–CQ– IV–1718 ) ; 4♀, Youyang Co., Xiaoba Town, Xinqiao Vill. , 28.83778°N, 108.72372°E, 924 m, 23.V.2017, G.C. Zhou et al. leg. ( HNU–CQ– IV– 1714 ) ; 4♀, Youyang Co., Xiaoba Town, Xinqiao Vill. , 28.83698°N, 108.72222°E, 933 m, 22.VII.2017, M. Irfan & G.C. Zhou leg. ( HNU–CQ– IV–1716 ); Hubei Prov.: 1♀, Enshi Co., Huangjindong Town, Maliuxi Vill. , 29.95240°N, 109.01717°E, 785 m, 25.VIII.2017, G.C. Zhou et al. leg. ( HNU–HB– IV–1727 ) .

Etymology. This specific species name derived from the type locality; adjective.

Diagnosis. Sydera yuelushanensis sp. n. resembles S. oii ( Figs 235A–D , 236A–C ; Yin et al., 2012, figs 267a–d), but can be distinguished by the tip of lamella characteristica notched in S. yuelushanensis sp. n. ( Figs 235A–C ; vs. hook-shaped); ventral part of pit hook relatively broad and dorsal tip with blunt end in S. yuelushanensis sp. n. ( Figs 235A–C ; vs. ventral part narrow and dorsal tip with pointed end). Spermathecae 9-shaped in S. yuelushanensis sp. n. ( Figs 236A–C ; vs. apical part not curved).

Description. Male (holotype, Figs 237A–C ): Total length: 1.65. Carapace: 0.71 long, 0.58 wide, orange to yellowish, cephalic region slightly elevated, outline concave, cervical and radial grooves distinct. Clypeus 0.16 high. Chelicerae with three promarginal and three retromarginal teeth.Sternum longer than wide, yellow with microsetae. Eyes: AER recurved, PER straight, slightly wider than AER. PMEs head–light shaped, relatively large. Eye sizes and interdistances: AME 0.03, ALE 0.06, PME 0.07, PLE 0.06, AME–AME 0.02, PME–PME 0.03, AME–ALE, 0.03, PME–PLE 0.01, AME–PME 0.05, ALE–ALE 0.22, PLE–PLE 0.23, ALE–PLE contiguous. Length of legs: I 2.85 (0.75, 0.92, 0.65, 0.53), II 2.55 (0.68, 0.81, 0.58, 0.48), III 2 (0.53, 0.64, 0.47, 0.36), IV 2.82 (0.76, 0.91, 0.68, 0.47). Tibial spine formula: 2-2-2- 2. TmI 0.53 and TmIV 0.52. Opisthosoma 0.94 long, 0.56 wide, oval, dusky grey, mid dorsally with black pattern extending to lateral sides; ventral side grey.

Palp ( Figs 235A–C ): Femur unmodified, almost longer than patella and tibia. Patella shorter than tibia, dorsally with long thick spine. Tibia with two retrolateral and one dorsal trichobothria; cymbium with a shallow depression at proximal end; paracymbium (PC) U-shaped, distal arm tip notched and with setae on proximal part. Pit hook ( PH) relatively large,ventral part broad and dorsal tip sclerotized, with blunt end. Radix (R) longer than wide, with Fickert’s gland (fg); lamella characteristica (LC) longer than wide with bifurcated tip; terminal apophysis (TA) tip sharp with pointed end. Embolus (E) slightly curved with pointed end attached with round thumb (TH).

Female (one of paratype, Figs 237C–F ): Total length: 2.06. Carapace: 0.72 long, 0.59 wide, yellow, cephalic region slightly elevated,cervical and radial grooves distinct. Clypeus 0.17 high. Chelicerae with three promarginal and three retromarginal teeth. Sternum longer than wide, yellowish green with microsetae. Eyes: AER recurved, PER straight, slightly wider than AER. PMEs head–light shaped, relatively large. Eye sizes and interdistances: AME 0.04, ALE 0.07, PME 0.07, PLE 0.06, AME–AME 0.03, PME–PME 0.03, AME–ALE, 0.02, PME–PLE 0.01, AME–PME 0.04, ALE–ALE 0.23, PLE–PLE 0.25, ALE– PLE contiguous. Length of legs: I 3.19 (0.91, 1.01, 0.76, 0.51), II 2.75 (0.75, 0.89, 0.62, 0.49), III 2.38 (0.67, 0.75, 0.49, 0.47), IV 2.99 (0.88, 0.94, 0.66, 0.51). Tibial spine formula: 2-2-2-2. TmI 0.63 and TmIV 0.54. Opisthosoma 1.34 long, 0.92 wide, oval, pale, posteriorly with black band around spinnerets, densely covered with fine setae.

Epigyne ( Figs 236A–C ): Ventral plate (VP) wider than long, copulatory openings (CO) present antero– ventrally; dorsal plate (DP) rectangular; copulatory ducts (CD) form long loop; spermathecae (S) 9-shaped, spaced by two times more width of spermathecae. Fertilization ducts (FD) long, extending mesally.

Distribution. Known only from the type localities (Chongqing, Hubei and Hunan Provinces, Figs 307 , 314 , 315 ).

Figures

FIGURE 235. Syedra yuelushanensis sp. n., male holotype. A Palp, prolateral view; B Palp, ventral view; C Palp, retrolateral view. Abbreviations: EP—embolus proper; fg—Fickert’s gland; LC—lamella characteristica; MM—median membrane; PC— paracymbium; PH—pit hook; R—radix; ST—subtegulum; T—tegulum; TA—terminal apophysis.

FIGURE 236. Syedra yuelushanensis 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 237. Syedra yuelushanensis 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 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..

FIGURE314.Distributionof LinyphiidaespeciesinHubeiProv.:35.Scotinotyluslongiprojectussp.n.;36.Shaanxinuslongiembolus sp. n.; 37. Sinogone puteus sp. n.; 38. Syedra yuelushanensis sp. n.; 39. Taibaishanus badongensis sp. n.; 40. Ummeliata feminea (Bösenberg & Strand, 1906); 41. Ummeliata insecticeps (Bösenberg & Strand, 1906); 42. Walckenaeria enshiensis sp. n.; 43. Walckenaeria extenuata sp. n.; 44. Walckenaeria xingdouensis sp. n.; 45. Wuliphantes tongluensis (Chen & Song, 1988).