Tapinocyba sulcata 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 : 189-192

Tapinocyba sulcata Irfan, Zhang & Peng , sp. n.

(ŧüƀ大e)

Figures 245–248 , 312

Types. Holotype ♂ ( HNU–HN– IV–1759 ), CHINA, Hunan Prov.: Shaoyang City, Suining Co., Zhaishi Town , Tieshanlin Vill. , Huangshan NNR , 26.37646 °N, 110.10573°E, 1129 m, 26.X.2017, G.C. Zhou leg. Paratypes: 1♂ 11♀, with same data as for holotype ( HNU–HN– IV–1759 ) .

Etymology. The specific epithet is derived from the Latin adjective “sulcatus, -a, um” meaning “grooved” and referring to the distal suprategular apophysis distal end grooved in male palp.

Diagnosis. The male of Tapinocyba sulcata sp. n. resembles those of T. praecox (O. Pickard-Cambridge, 1873) in having the similar embolic division ( Figs 245A– D ; Hormiga 2000, figs 27A–E, pl. 62A–E) and can be distinguished by the tibia with three apophyses (DTA, PTA and RTA) in T. sulcata sp. n. ( Fig. 240A, B, D ; vs. tibia with one apophysis); anterior radical apophysis present in T. sulcata sp. n. ( Figs 245A, C ; vs. absent); embolus half the length of dorsal tibial apophysis in T. sulcata sp. n. ( Figs 245D ; vs. longer than dorsal tibial apophysis). The female of T. sulcata sp. n. resembles those of T. pingshanensis sp. n. in having the similar ventral and dorsal plate ( Figs 247A–D ; Figs 243A–C ), and can be distinguished by the copulatory duct V-shaped in T. sulcata sp. n. ( Fig. 247D ), vs. comma-shaped in T. pingshanensis sp. n. ( Fig. 243C ); spermathecae present dorsoventrally in T. sulcata sp. n. ( Fig. 247D ), vs. present posterolaterally in T. pingshanensis sp. n. ( Fig. 243C ).

Description. Male (holotype, Figs 248A, B ): Total length: 1.73. Carapace 0.77 long, 0.63 wide, brown, cephalic region strongly elevated, with cephalic pits, fovea, cervical and radial grooves distinct. Clypeus 0.19 high. Chelicerae with four promarginal and five retromarginal teeth. Sternum longer than wide, dark brown with microsetae. Eyes: AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances: AME 0.03, ALE 0.06, PME 0.05, PLE 0.06, AME–AME 0.01, PME–PME 0.03, AME–ALE, 0.03, PME–PLE 0.04, AME–PME 0.06, ALE–ALE 0.24, PLE–PLE 0.25, ALE– PLE contiguous. Length of legs: I 2.34 (0.69, 0.78, 0.48, 0.39), II 2.17 (0.67, 0.69, 0.45, 0.36), III 1.84 (0.57, 0.59, 0.39, 0.29), IV 2.4 (0.72, 0.79, 0.52, 0.37). TmI 0.64 and TmIV 0.69. Tibial spine formula: 2-2-1-1. All the tibia dorsally with 2 to 3 trichobothria. Opisthosoma 0.96 long, 0.61 wide, oval, dorsal side grey, ventral side black.

Palp ( Figs 245A–D , 246A–C ): Femur unmodified, almost longer than both patella and tibia. Patella 2/3 length of tibia, ventrally grooved at proximal end. Tibia conic, with 1 retrolateral and 1 dorsal trichobothria, retrolateral tibial apophysis (RTA) somewhat triangular with blunt end, dorsal tibial apophysis (DTA) C-shaped, as long as tibia, distal end of retrodorsal margin of tibia sclerotized, with serrated margin and prolateral tibial apophysis (PTA) semicircular with blunt end; cymbium unmodified, oval in dorsal view; paracymbium (PC) J-shaped, distal arm hook-shaped; tegulum (T) almost round, protegulum (PT) distinctly developed, membranous; distal suprategular apophysis (DSA) longer than wide distally. Radix (R) longer than wide, anterior part sclerotized, moderately long, overlapping the suprategulum, posterior end strongly curved. Embolic membrane (EM) small, with serrated end. Embolus (E) sclerotized, stout, almost half the length of dorsal tibial apophysis, extending above the apex of cymbium.

Female (paratype, Figs 248C, D ): Total length: 1.84. Carapace 0.78 long, 0.56 wide, brown, cephalic region slightly elevated, fovea, cervical and radial grooves distinct. Clypeus 0.22 high. Chelicerae with five promarginal and five retromarginal teeth. Sternum longer than wide, dark brown with microsetae. Eyes: AER recurved, PER procurved, slightly wider than AER. Eye sizes and interdistances:AME 0.04, ALE 0.06, PME 0.05, PLE 0.05, AME–AME 0.02, PME–PME 0.04, AME– ALE, 0.02, PME–PLE 0.04, AME–PME 0.04, ALE–ALE 0.22, PLE–PLE 0.25, ALE–PLE contiguous. Length of legs: I 2.12 (0.63, 0.71, 0.42, 0.36), II 2.02 (0.62, 0.65, 0.40, 0.35), III 1.73 (0.51, 0.54, 0.37, 0.31), IV 2.26 (0.68, 0.77, 0.45, 0.36). TmI 0.62 and TmIV 0.64. Tibial spine formula: 2-2-1-1. Opisthosoma 1 long, 0.74 wide, oval, brownish black, ventral side brownish black.

Epigyne( Figs247A–D ):Ventralplate(VP)sclerotized, narrow posteriorly; dorsal plate (DP) rectangular, wider than long; copulatory opening (CO) present mid ventrally at the junction of dorsal and ventral plate; copulatory ducts (CD) simple, fused at the beginning, forming long loop before entering the spermathecae; spermathecae (S) small, round; fertilization ducts (FD) short, extending mesally.

Distribution. Known only from the type locality (Hunan Province, Fig. 315 ).

Figures

FIGURE 240. Tapinocyba cornuta sp. n., male holotype. A Palp, prolateral view; B Palp, retrolateral view; C Palp, ventral view; D Palp, dorsal view. Abbreviations: DSA—distal suprategular apophysis; DTA—dorsal tibial apophysis; E—embolus; PC—paracymbium; PT—protegulum; PTA—prolateral tibial apophysis; R—radix; RTA—retrolateral tibial apophysis; SPT— suprategulum; ST—subtegulum; T—tegulum; TP—tailpiece.

FIGURE 243. Tapinocyba pingshanensis 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 245. Tapinocyba sulcata sp. n., male holotype. A Palp, prolateral view; B Palp, retrolateral view; C Palp, ventral view; D Palp, dorsal view. Abbreviations: ARP—anterior radical process; DSA—distal suprategular apophysis; DTA—dorsal tibial apophysis; E—embolus; Em—embolic membrane; L—lamella; PC—paracymbium; PT—protegulum; PTA—prolateral tibial apophysis; R—radix; RTA—retrolateral tibial apophysis; SPT—suprategulum; ST—subtegulum; T—tegulum; TP—tailpiece.

FIGURE 246. Tapinocyba sulcata sp. n., male paratype palp. A Embolic division, prolateral view; B Embolic division, dorsal view; C Embolic division, retrolateral view. Abbreviations: ARP—anterior radical process; DSA—distal suprategular apophysis; E—embolus; Em—embolic membrane; R—radix; SPT—suprategulum; TP—tailpiece.

FIGURE 247. Tapinocyba sulcata sp. n., female (one of paratypes). A, C Epigyne, ventral view; B Epigyne, lateral view; D Vulva, dorsal view. Abbreviations: CD—copulatory duct; CO—copulatory opening; DP—dorsal plate; FD—fertilization duct; S—spermatheca; VP—ventral plate.

FIGURE 248. Tapinocyba sulcata sp. n., male holotype (A, B) and female paratype (C, D). A, C Habitus, dorsal view; B, D Habitus, ventral view.

FIGURE 312. Distribution of Linyphiidae species in Hubei Prov.: 2. Asiagone xingdouensis sp. n.; 3. Bathyphantes paracymbialis Tanasevitch, 2014; 4. Bifurcia cochlearis sp. n.; 5. Capsulia tianmushana (Chen & Song, 1987); 6. Dicristatus cordatus sp. n.; 7. Diplocephalus circularis sp. n.; 8. Erigone prominens Bösenberg & Strand, 1906; 9. Frontinella zhui Li & Song, 1993; 10. Gnathonarium dentatum (Wider, 1834); 11. Gongylidioides ensis sp. n.; 12. Gongylidioides microdontus sp. n.; 13. Gongylidium dawolongense sp. n.; 14. Gongylidium minutum sp. n.; 15. Gongylidium uncatum sp. n.; 16. Houshenzinus rimosus Tanasevitch, 2006; 17. Hylyphantes graminicola (Sundevall, 1830); 18. Indophantes wushanensis Irfan, Wang & Zhang, 2023; 1. Microneta maliuxiensis sp. n..

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..