Otacilia jiajinshan sp. nov. (ẊḔ山Þffifl)

Figs 1E–F, 6, 7

Type material. Holotype ♂: CHINA: Sichuan Province: Ya’an City, Baoxing County, Jiajinshan National Forest Park, Xinzhaizigou (30°48.32′N, 102°43.64′E, 2457 m elev.), 30 Jul. 2016, leg. Chi Jin.

Paratypes: 2♂ 3♀, with same data as holotype .

Etymology. The species name is derived from the type locality; noun in apposition.

Diagnosis. This new species is similar to Otacilia submicrostoma Jin, Fu, Yin & Zhang, 2016 in having a similarly shaped FA, sperm duct and embolus, but the male can be recognized by: 1) the RTA wide, with a blunt tip (vs thin and pointed, compare Fig. 7B, D with fig. 12B–C in Jin et al. 2016), and 2) the presence of a protruding excrescence on the distal part of the tegulum (vs absent, compare Fig. 7B with fig. 12C in Jin et al. 2016). The female can be recognized by: 1) the long connecting tube (vs short, compare Fig. 7E with fig. 12D in Jin et al. 2016), and 2) a pair of large COs (vs small, compare Fig. 7E with fig. 12D in Jin et al. 2016).

Description. Male: total length 3.15–3.63 (n=3). Holotype (Fig. 1E): total length 3.63, carapace 1.70 long, 1.42 wide (CW); abdomen 1.93 long, 1.36 wide. Eye sizes and interdistances: AME 0.09, ALE 0.11, PME 0.09, PLE 0.09; AME–AME 0.05, AME–ALE 0.01, ALE–ALE 0.24, PME–PME 0.13, PME–PLE 0.08, PLE–PLE 0.43, ALE–PLE 0.09. Eye area 0.56 wide (EAW), cephalic region 0.76 wide (CRW), EAW/CRW 0.74. CRW/CW 0.54. MOA 0.25 long, anterior width 0.22, posterior width 0.31. Clypeal height 0.17 (CH), CH /AME 1.89. Chelicerae with three promarginal and four retromarginal teeth. Carapace black, with light ring around margin of carapace; broad longitudinal gray band along midline, slightly broader than eye area, with several shapes resembling flowing water droplets beside fovea. Abdomen oval, gray, with small, black and inverted triangular dorsal scutum anteriorly, four black chevron stripes posteriorly (Fig. 1E).

Palp as in Figs 6, 7 (A–D). FA high. RTA slightly curved, snake head-shaped in retrolateral view, with blunt tip (Fig. 7B). Tegulum nearly as wide as cymbium, parallelogram shaped. Sperm duct obvious, tapering from retrolateral to prolateral side of tegulum, then distally. Embolus thin, straight, transverse. TA small, triangular (Fig. 7C).

Female: total length 3.46–3.60 (n=3). One paratype (Fig. 1F): total length 3.57, carapace 1.70 long, 1.52 wide (CW); abdomen 1.87 long, 2.87 wide. Eye sizes and interdistances: AME 0.09, ALE 0.10, PME 0.08, PLE 0.10; AME – AME 0.06, AME – ALE 0.02, ALE – ALE 0.26, PME – PME 0.13, PME – PLE 0.08, PLE – PLE 0.43, ALE – PLE 0.10. Eye area 0.56 wide (EAW), cephalic region 0.78 wide (CRW), EAW/CRW 0.72. CRW/CW 0.51. MOA 0.23 long, anterior width 0.21, posterior width 0.30. Clypeal height 0.12 (CH), CH / AME 1.33. Other characters as for male, except four brown chevron stripes posteriorly on abdomen, lack of DS, brown color and slightly smaller body size (Fig. 1F) .

Epigyne as in Figs 6, 7 (E–F). An obvious atrium with straight posterior edge and curved anterior edge located at middle part of epigynal plate (Fig. 6E). Median septum thin, truncated anteriorly at atrium (Fig. 6E). Copulatory openings large, located at posterior edge of atrium, separated by about diameter of spermathecae (Fig. 7E). Copulatory ducts short and thick, extending downward and finally curved toward retrolateral side, connecting with long curved bursa. Glandular appendages slender, digit-shaped. Connecting tube thin and long, extending from anterior of copulatory ducts to posterior of spermathecae. Spermathecae large, globular, separated by less than one diameter of spermathecae. Fertilization ducts located prolaterally on anterior margin of spermathecae.

Measurements of legs:

Distribution. China (Sichuan Province).