Spinirta jinyunshanensis, Jin & Zhang, 2020

Jin, Chi & Zhang, Feng, 2020, Spinirta gen. nov., a new dark sac spider genus from southern China (Araneae: Corinnidae), Zootaxa 4838 (3), pp. 301-330 : 305-309

publication ID	https://doi.org/ 10.11646/zootaxa.4838.3.1
publication LSID	lsid:zoobank.org:pub:112D4DC3-723A-4216-A608-3D03B392E973
DOI	https://doi.org/10.5281/zenodo.4404461
persistent identifier	https://treatment.plazi.org/id/F86787F2-FF8F-FF9E-25C0-CFA67CB9176B
treatment provided by	Plazi
scientific name	Spinirta jinyunshanensis
status	sp. nov.

Treatment

Spinirta jinyunshanensis View in CoL sp. nov. (ṞĀƜḦẊĦ)

Figs 1 View FIGURE 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. GoogleMaps Paratypes: 3♀ 1♂, same data as holotype GoogleMaps ; 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 GoogleMaps ; 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 View FIGURE 6 ), whereas lateral branch flaky and truncated at tip in S. aviforma sp. nov. ( Figs 16G, H View FIGURE 16 ); 2) palpal tibia ventral protrusion as a hump ( Fig. 6C View FIGURE 6 ), whereas it is an apophysis with a pointed tip in S. aviforma sp. nov. ( Fig. 16H View FIGURE 16 ). 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 View FIGURE 6 ), whereas they are kidneyshaped and parallel to each other in S. forcipata sp. nov. ( Fig. 9G View FIGURE 9 ); 2) CDs are much thinner than those of the latter ( Figs 6H View FIGURE 6 , 9H View FIGURE 9 ).

Description. Male ( Figs 1B View FIGURE 1 , 3A View FIGURE 3 , 4 View FIGURE 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 View FIGURE 3 , 6 View FIGURE 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 View FIGURE 1 , 4 View FIGURE 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 View FIGURE 6 , 7E View FIGURE 7 ): copulatory openings oval, separated, with inverted V-shaped arrangement. Vulva ( Figs 6H View FIGURE 6 , 7F View FIGURE 7 ): 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 View FIGURE 26 ).