Sinamma yingae Cheng & Ren & Tong & Bian & Li 2022, sp. nov.

Sinamma yingae Tong & Li, sp. nov.

Figs 3C, D, 5A–I, 6A–I, 7A–C, 8

Type material. Holotype: Male (SYNU-495), Xitou Forest Protection Station (24°55′15″N, 113°4′56″E; elevation 510 m), Nanling National Natural Reserve, Daqiao Town, Ruyuan Yao Autonomous County, Shaoguan City, Guangdong Province, China, 13 April 2021, W. Cheng, Y. Huang, K. Yang and T. Jiang leg. Paratype: 1 female (SYNU-496), same data as holotype.

Etymology. The species is named after Miss Ying Huang, one of the holotype collectors; noun in genitive case.

Diagnosis. Males of Sinamma yingae sp. nov. resemble Sinamma oxycera Lin & Li, 2014 in having the conical cheliceral horn, the strongly modified leg I and the pyriform-shaped palpal bulb and thread-like embolus. Females of the new species resemble S. oxycera by the eyes pattern and the well-developed inner vulval plate. Males of Sinamma yingae sp. nov. can be distinguished from Sinamma oxycera Lin & Li, 2014 and S. quadrata sp. nov. by lacking the pointed eye tubercle (Fig. 5G, H) (vs pointed eye tubercle in S. oxycera and S. quadrata (Lin & Li 2014: fig. 1E, G; Fig. 1G, H)). Males of the new species also can be distinguished from S. quadrata sp. nov. by the pyriform-shaped palpal bulb and thread-like embolus (Fig. 6A, B) (vs quadrangular shaped palpal bulb and beltshaped embolus in S. quadrata (Fig. 2A, B)). Females of the new species can be distinguished from S. oxycera Lin & Li, 2014 by lacking cephalic tubercles (Fig. 5F, I) (vs with a pair of cephalic tubercles in S. oxycera (Lin & Li 2014: fig. 1F, H); from S. quadrata sp. nov. by having triangle-shaped inner vulval plate (Fig. 7C), flat posterior part of the sternum (Fig. 5F), and cephalic part slightly sloping, with the highest point of carapace at ocular area (Fig. 5F) (vs finger-shaped inner vulval plate (Fig. 4C), the posterior part of sternum strongly bulged (Fig. 1E, F) and the cephalic part slightly elevated, with the highest point of carapace at posterior 2/3 (Fig. 1F) in S. quadrata).

Description. Male (holotype, SYNU-495). Coloration: body reddish-brown; legs yellowish brown. Measurements: total length 1.41; carapace 0.71 long, 0.55 wide, 0.42 high; abdomen 0.97 long, 0.74 wide, 0.56 high; clypeus 0.35 high; sternum 0.42 long, 0.42 wide. Length of legs: I 1.69 (0.65, 0.19, 0.36, 0.23, 0.26); II 1.58 (0.54, 0.17, 0.36, 0.25, 0.26); III 1.43 (0.44, 0.16, 0.33, 0.27, 0.23); IV 1.78 (0.56, 0.17, 0.47, 0.33, 0.25).

Carapace (Fig. 5A, C, G, H): reticulated, margin with small denticles; ocular area raised (Fig. 5C, G, H); clypeus very high, anterior margin rounded (Fig. 5G, H); cheliceral horn long, basally wide, with a small apophysis, distally crooked (Fig. 5H); sternum with sparse setae, reticulate (Fig. 5B). Legs (Fig. 3C, D): femur I swollen; tibiae I–III with 3 trichobothria, tibia IV with 4 trichobothria, and metatarsi I-IV with a trichobothrium; tibia I with two large distal tubercles (ldt); metatarsus I with one proximal (pt) and two distal tubercles (dt).

Abdomen (Fig. 5A–C): booklung covers oval, brown; dorsal scutum oval, finely reticulated; ventral scutum rugose; postgenital plate narrow, shorter in width to preanal plate.

Palp (Fig. 6A–I): femur smooth; patella approximately 2/3 femur in length, connected to tibia subbasally; bulb long, pyriform; embolus long, thread-like, curved slightly, strongly sclerotized; sperm duct extending, visible through the bulbal integument.

Female (paratype, SYNU-496). Coloration: same as in male.

Measurements: total length 1.41; carapace 0.65 long, 0.50 wide, 0.30 high; abdomen 0.91 long, 0.67 wide, 0.49 high; clypeus 0.19 high; sternum 0.38 long, 0.38 wide. Length of legs: I 1.40 (0.47, 0.16, 0.32, 0.22, 0.23); II 1.35 (0.44, 0.16, 0.30, 0.22, 0.23); III - (0.31, 0.15, 0.27, -, -); IV 1.64 (0.52, 0.16, 0.43, 0.30, 0.23).

Carapace (Fig. 5D, F, I): cephalic part slightly sloping, clypeus lower than in male; cheliceral horn absent. Legs as in male, except for leg I undecorated.

Abdomen (Fig. 5E, F): ventral episgastric scutum rugose; postgenital plate straight, wider than preanal plate; preanal plate rectangular-shape.

Genitalia (Fig. 7A–C): epigynal fold wide (Fig. 7A); vulval stem wide, strongly sclerotized; lateral horns slightly sclerotized, supporting the base of vulval ducts of spermathecae; inner vulval plate triangle-shaped, slightly sclerotized (Fig. 7C).

Distribution. Known only from the type locality (Fig. 8).