Spinirta aviforma, 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 : 317-318

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.4404467
persistent identifier	https://treatment.plazi.org/id/F86787F2-FF9B-FF87-25C0-CAF57CB91192
treatment provided by	Plazi
scientific name	Spinirta aviforma
status	sp. nov.

Treatment

Spinirta aviforma View in CoL sp. nov. (ḢḦẊĦ)

Figs 3E View FIGURE 3 , 16–17 View FIGURE 16 View FIGURE 17

Type material. Holotype: ♂, CHINA: Chongqing Municipality, Jinyun Mountain, Banzigou (pitfall traps) (29°47.225′N, 106°20.012′E), 518 m a.s.l., 5 October 2010, leg. Haijun Liu. GoogleMaps

Etymology. The specific name is from the Latin words avem, meaning “bird”, and formis, meaning “shaped”, referring to the embolus that is shaped like a bird’s head.

Diagnosis. The male resembles S. jinyunshanensis sp. nov.; for detailed diagnosis see above. Female unknown.

Description. Male ( Figs 3E View FIGURE 3 , 16–17 View FIGURE 16 View FIGURE 17 ). Holotype: body 9.06 long; carapace 4.46 long, 3.36 wide, width: length = 0.75; abdomen 4.60 long, 3.01 wide. Diameters of eyes: AME 0.28, ALE 0.26, PME 0.26, PLE 0.27. Eye interdistances: AME–AME 0.15, AME–ALE 0.07, ALE–ALE 0.85, PME–PME 0.26, PME–PLE 0.31, PLE–PLE 1.30, ALE–PLE 0.09. OAW 1.58, CRW 2.15, OAW/CRW = 0.73. MOA 0.56 long, front width 0.70, back width 0.74. Clypeus height 0.30, 1.07 times AME diameter. Chelicerae with three promarginal and five retromarginal teeth. Labium 0.70 long, 0.66 wide. Sternum 2.00 long, 1.85 wide. Measurements of legs: leg I 11.94 (3.33 + 1.55 + 2.74 + 2.68 + 1.64), II 11.39 (3.23 + 1.49 + 2.51 + 2.57 + 1.59), III 9.51 (2.73 + 1.28 + 1.98 + 2.29 + 1.23), IV 13.04 (3.58 + 1.50 + 2.91 + 3.62 + 1.43).

Palp as illustrated ( Figs 3E View FIGURE 3 , 16 View FIGURE 16 E–I, 17). Tibial ventral protrusion as an apophysis, triangular. RTA outer edge oval; ventral surface with dense thick relatively long scimitar-like spines. PTA triangular. Tegulum retrolateral apex triangular. Subtegulum with several staggered grooves on prolateral surface. Embolus shaped like bird’s head, longer than embolar apophysis, with digitiform, blunt tip; embolar apophysis short, flaky and truncated at tip, with file-like grooves on prolateral surface.

Distribution. China (Chongqing) ( Fig. 26 View FIGURE 26 ).