Acanoides cornutus 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 : 7

Acanoides cornutus Irfan, Zhang & Peng , sp. n.

(ssäx刺me)

Figures 2 , 3 , 315

Types. Holotype ♀ ( HNU–HN– IV–1767 ), CHINA, Hunan Prov.: Huaihua City, Huitong Co., Tuanhe Town , Diaotang Vill ., Yingzuijie NNR , 26.90186°N, 109.93529°E, 390 m, 29.X.2017, G.C. Zhou et al. leg . Paratypes: 3♀, with same data as for holotype ( HNU– HN– IV–1767 ).

Etymology. The specific epithet is derived from the Latin adjective “cornutus , -a, -um” meaning “horned” and referring to the horn-shaped spermathecae in the vulva.

Diagnosis. Acanoides cornutus sp. n. resembles A. beijingensis and A. cultellifer in having the similar ventrally folded extensible epigynal basal part, ventral and dorsal plates longer than wide in epigyne ( Figs 2A– D ; Sun et al. 2014, figs 2F–H; Han et al. 2015, figs 7, 8, 11, 12), but can be distinguished by its horn-shaped spermathecae in A. cornutus sp. n. ( Fig. 2D ; vs. U-shaped in A. beijingensis and kidney-shaped in A. cultellifer ); somewhat triangular posteriorly ventral part of anterior wall in A. cornutus sp. n. ( Figs 2C, 2D ; vs. somewhat tongue-shaped posteriorly both in A. beijingensis and A. cultellifer ); posterior median plate not covered by ventral part of anterior wall in A. cornutus sp. n. ( Fig. 2D ; vs. partly covered by ventral part of anterior wall both in A. beijingensis and A. cultellifer ).

Description. Female (holotype, Figs 3A–B ): Total length: 1.91, carapace 0.83 long, 0.67 wide, cephalic region slightly elevated, yellowish brown; fovea, cervical and radial grooves distinct. Clypeus 0.18 high. Chelicerae with four promarginal and three retromarginal teeth. Sternum longer than wide, brown. Eyes: AER recurved, PER slightly recurved and slightly wider than AER. Eye sizes and interdistances:AME 0.03, ALE 0.08, PME 0.07, PLE 0.07, AME–AME 0.03, PME–PME 0.04, AME– ALE, 0.05, PME–PLE 0.04, AME–PME 0.09, ALE–ALE 0.30, PLE–PLE 0.32 ALE–PLE 0.02. Length of legs: I 3.48 (1.06, 0.96, 0.81, 0.65), II 2.97 (0.92, 0.84, 0.68, 0.53), III 2.31 (0.69, 0.70, 0.48, 0.44), IV 3.1 (0.90, 0.92, 0.73, 0.55). Tibial spine formula: 2-2-2-2. TmI 0.46 and TmIV absent. Opisthosoma 1.21 long, 0.74 wide, oval, dorsally with distinct black pattern extending to base of spinnerets and on lateral sides; ventral side light brown.

Epigyne ( Figs 2A–D ): Epigynal plate two times longer than wide. Anterior wall (AW) longer than wide, narrowing posteriorly. Posterior median plate (PMP) longer than wide, tongue-shaped; epigynal cavity present. Copulatory openings (CO) situated dorso-posteriorly at the apical end of anterior wall. Spermathecae (S) touches each other.

Male. Unknown.

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

Figures

FIGURE 2. Acanoides cornutus sp. n., female holotype. A, C Epigyne, ventral view; B Epigyne, lateral view; D Epigyne, dorsal view. Abbreviations: AW—anterior wall of epigyne; CG—copulatory groove; CO—copulatory opening; EA—extensible area of epigynal basal part; PMP—posterior median plate; S—spermatheca.

FIGURE 3. Acanoides cornutus sp. n., female holotype. A Habitus, dorsal view; B 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..