Spinirta aurita, 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

Spinirta aurita sp. nov. (HḦẊĦ)

Figs 3D , 14–15

Type material. Holotype: ♂, CHINA: Zhejiang Province, Linan City, Qingliangfeng Mountain (30°06.459′N, 118°54.476′E), 925 m a.s.l., 21 October 2011, leg. Fan Zou. Paratypes: 1♂, Anhui Province, Jixi County, Fuling Town, Yonglai Village , Qingliangfeng Mountain , Yezhutan (30°08.796′N, 118°51.189′E), 746 m a.s.l., 18 July 2013, leg. Shanjie Zha.

Etymology. The specific name is from the Latin word aurita meaning “ear-shaped”, referring to the outer edge of the RTA is ear-shaped.

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

Description. Male ( Figs 3D , 14–15 ). Holotype: body 9.80 long; carapace 4.84 long, 4.06 wide, width: length = 0.84; abdomen 4.96 long, 2.70 wide. Diameters of eyes: AME 0.35, ALE 0.26, PME 0.29, PLE 0.26. Eye interdistances: AME–AME 0.16, AME–ALE 0.06, ALE–ALE 0.88, PME–PME 0.28, PME–PLE 0.35, PLE–PLE 1.47, ALE–PLE 0.16. OAW 1.71, CRW 2.43, OAW/CRW = 0.70. MOA 0.71 long, front width 0.73, back width 0.84. Clypeus height 0.38, 1.09 times AME diameter. Chelicerae with three promarginal teeth and five retromarginal teeth. Labium 0.87 long, 0.73 wide. Sternum 2.25 long, 2.22 wide. Measurements of legs: leg I 16.02 (4.33 + 1.95 + 3.82 + 3.75 + 2.17), II 15.54 (4.25 + 1.83 + 3.67 + 3.61 + 2.18), III 13.33 (3.66 + 1.62 + 2.97 + 3.24 + 1.84), IV lost.

Palp as illustrated ( Figs 3D , 14 E–I, 15). Tibial ventral protrusion low, inconspicuous. RTA outer edge earshaped, concave medially; ventral surface with dense thick short coniform spines. PTA triangular. Tegulum retrolateral apex round, sperm duct much thinner than that of congeners. Subtegulum with two transverse grooves on prolateral surface. Embolus long, with long and sharp embolar apophysis, both curving prolateral in ventral view; file-like grooves almost invisible on embolar apophysis surface.

Distribution. China (Zhejiang, Anhui) ( Fig. 26 ).

Figures

FIGURE 3. RTAs of Spinirta gen. nov. species (A–D, F. ventral view; E. retrolateral view): A. S. jinyunshanensis sp. nov.; B. S. forcipata sp. nov.; C. S. sparsula sp. nov.; D. S. aurita sp. nov.; E. S. aviforma sp. nov.; F. S. quadrata sp. nov..

FIGURE 14. Spinirta aurita sp. nov.: A. male habitus, dorsal view; B. same, ventral view; C. male ocular area, dorsal view; D. male cephalothorax, frontal view; E. RTA, ventral view; F. male left palp, prolateral view; G. same, ventral view; H. same, retrorolateral view; I. same, dorsal view.

FIGURE 15. Spinirta aurita sp. nov.: A. male left palp, prolateral view; B. same, ventral view; C. same, retrorolateral view; D. same, dorsal view.

FIGURE 26. Distribution of Spinirta gen. nov. species treated in this paper.