Spinirta jinyunshanensis Jin & Zhang 2020, sp. nov.
Creators: name: Jin, Chi
name: Zhang, Feng
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Corinnidae
Spinirta
Spinirta jinyunshanensis

description: Spinirta jinyunshanensis sp. nov. (ṞĀƜḦẊĦ)
Figs 1 A–B, 3A, 4–7
Type material. Holotype: ♂, CHINA: Chongqing Municipality, Jinyun Mountain (29°50.227′N, 106°23.731′E), 775 m a.s.l., 18 September 2016, leg. Luyu Wang. Paratypes: 3♀ 1♂, same data as holotype; 1♀, Chongqing Municipality, Jinyun Mountain, Dawuji (29°49.043′N, 106°21.709′E), 625 m a.s.l., 16 October 2011, leg. Luyu Wang; 1♀, Jinyun Mountain, 13 October 2017, leg. Xuyun Gong.
Etymology. The specific name is derived from the type locality; adjective.
Diagnosis. The male resembles S. aviforma sp. nov. in having an oval outer edge of the RTA, and the embolus with a short branch, but can be distinguished from it by: 1) lateral branch of embolus digitiform with blunt tip and main branch with file-like grooves on surface (Figs 6B, C, E), whereas lateral branch flaky and truncated at tip in S. aviforma sp. nov. (Figs 16G, H); 2) palpal tibia ventral protrusion as a hump (Fig. 6C), whereas it is an apophysis with a pointed tip in S. aviforma sp. nov. (Fig. 16H). The female resembles S. forcipata sp. nov. in having separated COs, but can be distinguished from it by: 1) COs oval, orthogonal to each other (Fig. 6G), whereas they are kidneyshaped and parallel to each other in S. forcipata sp. nov. (Fig. 9G); 2) CDs are much thinner than those of the latter (Figs 6H, 9H).
Description. Male (Figs 1B, 3A, 4 A–D, 5E, 6A–F, 7A–D). Total length 7.99–8.21 (n=2). Holotype: body 7.99 long; carapace 4.20 long, 3.32 wide, width/length = 0.79; abdomen 3.79 long, 2.68 wide. Diameters of eyes: AME 0.27, ALE 0.23, PME 0.25, PLE 0.24. Eye interdistances: AME–AME 0.13, AME–ALE 0.08, ALE–ALE 0.83, PME–PME 0.21, PME–PLE 0.25, PLE–PLE 0.16, ALE–PLE 0.10. OAW 1.47, CRW 2.01, OAW/CRW = 0.73. CRW/carapace width = 0.61. MOA 0.49 long, front width 0.65, back width 0.69. Clypeus height 0.26, 0.96 times AME diameter. Chelicerae with four promarginal teeth and five retromarginal teeth. Labium 0.63 long, 0.57 wide. Sternum 1.89 long, 1.81 wide. Measurements of legs: leg I 12.17 (3.36 + 1.41 + 2.83 + 2.81 + 1.76), II 11.53 (3.22 + 1.33 + 2.64 + 2.65 + 1.69), III 9.99 (2.68 + 1.31 + 2.12 + 2.45 + 1.43), IV 13.73 (3.65 + 1.37 + 3.21 + 3.80 + 1.70).
Palp as illustrated (Figs 3A, 6 A–F, 7A–D). Tibial ventral hump round. RTA outer edge oval; ventral surface with dense thick short wedge-shaped spines. PTA triangular. Tegulum retrolateral apex triangular and pointed. Subtegulum surface with two longitudinal grooves on prolateral surface. Embolus long and broad, with blunt tip; embolar apophysis short, digitiform, with blunt tip; embolus and embolar apophysis both with file-like grooves on surface.
Female (Figs 1A, 4 E–H, 5A–D, 6G, H, 7E, F). Total length 10.11–11.42 (n=5). One paratype: body 10.25 long; carapace 4.31 long, 3.40 wide, width/length = 0.79; abdomen 5.94 long, 4.20 wide. Diameters of eyes: AME 0.25, ALE 0.23, PME 0.23, PLE 0.22. Eye interdistances: AME–AME 0.17, AME–ALE 0.09, ALE–ALE 0.83, PME–PME 0.23, PME–PLE 0.24, PLE–PLE 1.18, ALE–PLE 0.10. OAW 1.46, CRW 2.14, OAW/CRW = 0.68. CRW/carapace width = 0.63. MOA 0.52 long, front width 0.62, back width 0.70. Clypeus height 0.29, 1.16 times AME diameter. Chelicerae with four promarginal teeth and five retromarginal teeth. Labium 0.67 long, 0.66 wide. Sternum 2.08 long, 1.83 wide. Measurements of legs: leg I 11.91 (3.35 + 1.47 + 2.84 + 2.65 + 1.60), II 11.43 (3.28 + 1.45 + 2.60 + 2.54 + 1.56), III 10.02 (2.90 + 1.32 + 2.17 + 2.32 + 1.31), IV 13.52 (3.64 + 1.48 + 3.19 + 3.67 + 1.57).
Epigyne (Figs 6G, 7E): copulatory openings oval, separated, with inverted V-shaped arrangement. Vulva (Figs 6H, 7F): copulatory ducts moderately inflated anteriorly, with less membranous parts, then forming right-angled bend medially and extending backwards; accessory glands small, digitiform; spermathecae separated by less one spermatheca’s diameter.
Distribution. China (Chongqing) (Fig. 26).
description: Published as part of Jin, Chi & Zhang, Feng, 2020, Spinirta gen. nov., a new dark sac spider genus from southern China (Araneae: Corinnidae), pp. 301-330 in Zootaxa 4838 (3) on pages 305-309, DOI: 10.11646/zootaxa.4838.3.1, http://zenodo.org/record/4403970