Spinirta gen. nov., a new dark sac spider genus from southern China (Araneae: Corinnidae) Author Jin, Chi 0000-0002-4694-4870 College of Landscape and Ecological Engineering, Hebei University of Engineering, Handan, Hebei 056038, P. R. China. jinchi _ spider @ 163. com; https: // orcid. org / 0000 - 0002 - 4694 - 4870 & The Key Laboratory of Zoological Systematics and Application, College of Life Sciences, Hebei University, Baoding, Hebei 071002, P. R. China Author Zhang, Feng The Key Laboratory of Zoological Systematics and Application, College of Life Sciences, Hebei University, Baoding, Hebei 071002, P. R. China text Zootaxa 2020 2020-08-27 4838 3 301 330 journal article 8680 10.11646/zootaxa.4838.3.1 a3d37dde-cd1c-46a3-8727-b3140740562e 1175-5326 4403970 112D4DC3-723A-4216-A608-3D03B392E973 Spinirta rugosa sp. nov. (DḦẊĦ) Figs 1D , 24–25 Type material. Holotype : ♀ , CHINA : Sichuan Province , Baoxing County , Fengtongzhai National Nature Reserve , Dadigou ( 30°28.171′N , 102°52.742′E ), 1191 m a.s.l. , 2 August 2016 , leg. Chi Jin. Paratypes : 2♀ , Sichuan Province , Yaan City , Laoban Mountain ( 29°58.489′N , 102°59.645′E ), 655 m a.s.l. , 9 November 2014 , leg. Luyu Wang. Etymology. The specific name is from the Latin word rugosa , meaning “coarse”, referring to the texture of the part of the copulatory ducts near the spermathecae. Diagnosis. The female can be distinguished from other congeners by the horseshoe-shaped atrium, and the coarse texture of part of the copulatory ducts near the spermathecae. Male unknown. Description. Female ( Figs 1D , 24–25 ). Total length 14.59–15.44 (n=3). Holotype : body 15.44 long; carapace 7.11 long, 6.04 wide, width: length = 0.85; abdomen 8.33 long, 5.00 wide. Diameters of eyes: AME 0.45, ALE 0.33, PME 0.41, PLE 0.37. Eye interdistances: AME–AME 0.30, AME–ALE 0.18, ALE–ALE 1.50, PME–PME 0.46, PME–PLE 0.53, PLE–PLE 2.22, ALE–PLE 0.23. OAW 2.60, CRW 4.07, OAW/CRW = 0.64. MOA 1.07 long, front width 1.14, back width 1.21. Clypeus height 0.61, 1.36 times AME diameter. Chelicerae with three promarginal teeth and five retromarginal teeth. Labium 1.35 long, 1.36 wide. Sternum 3.48 long, 3.02 wide. Measurements of legs: leg I 22.41 (6.45 + 2.93 + 5.53 + 4.99 + 2.51), II 21.85 (6.32 + 2.86 + 5.16 + 4.89 + 2.62), III 17.60 (4.91 + 2.25 + 3.73 + 4.36 + 2.35), IV 22.91 (6.17 + 2.51 + 5.61 + 6.43 + 2.19). Epigyne ( Figs 24E , 25A ): Vulva ( Figs 24F , 25B ): atrium horseshoe-shaped, wider than long, incompletely fused by COs, with protrusion on anterior margin medially. Vulva ( Figs 22F , 23B ): copulatory ducts anteriorly extremely inflated, almost round, partly membranous, posteriorly thin, rugose, running parallel before connecting spermathecae; accessory glands small, spherical; spermathecae small, close to each other. Distribution. China ( Sichuan ) ( Fig. 26 ).