Trilacuna mopanshan Tong & Li sp. nov.

Figs 6 C, D, 7, 8, 9, 10 Common name: 磨盘山三窝蛛

Type material.

Holotype China • ♂ (SYNU -925); Yunnan Prov., Yuxi City, Xinping Co., Mopanshan National Forest Park; 23°57'36.42"N, 101°56'23.58"E, 2113 m elev.; 1.VI.2015; Z. Chen & Y. Li leg. Paratypes. China • 6 ♀ (SYNU -926, SYNU -980 –984); same data as holotype .

Other material.

China • 1 ♂ 3 ♀ (SYNU -985 –988); Yunnan Prov., Yuxi City, Xinping Co., Xinhua Township, Guzhou Wild Forest; 24°6'37.98"N, 101°50'59.88"E, 1987 m elev.; 2.VI.2015; Z. Chen & Y. Li leg.

Etymology.

The specific name is a noun in apposition taken from the type locality.

Diagnosis.

The new species is similar to T. xinping in the granulated carapace and the slightly elevated male epigastric region, but can be distinguished by the sternum strongly rugose (Fig. 7 D) vs. reticulate, with a cluster of short setae (Tong et al. 2019: fig. 20 A), the base of bulb strongly swollen ventrally (Figs 8 A, 9 A) vs. straight (Tong et al. 2019: figs 19 E, 23 E), the psembolus with two leaf-like lobes (Fig. 9 D) vs. comb-shaped lobes (Tong et al. 2019: fig. 20 B), and the scutum of female covering about 5 / 6 of abdomen length (Fig. 10 A, C, E) vs. the whole abdomen (Tong et al. 2019: fig. 21 A, B, C).

Description.

Male. Body: yellow, legs pale yellow; habitus as in Fig. 7 A, C, E; body length 1.52; Carapace (Fig. 7 B, F): 0.75 long, 0.52 wide; sides granulate. lateral sides granulate. Eyes (Fig. 7 B, H): well developed; ALE largest, PLE smallest; posterior eye row recurved from above, procurved from front; ALE separated from edge of carapace by 1.3 diameters. Mouthparts (Figs 7 D, 8 G): endites distally branched. Sternum (Fig. 7 D): surface strongly rugose. Abdomen (Fig. 7 A, C, E, G): 0.69 long, 0.54 wide; sperm pore situated at level of anterior spiracles; apodemes present, posterior spiracles not connected by groove; with small semi-circular spot situated between posterior spiracles; epigastric region slightly elevated. Palp (Figs 8 A – F, 9 A – H): yellow; 0.54 long (0.17, 0.10, 0.11, 0.16); femur swollen (width / length = 0.82); tibia about as long as patella; bulb triangular, base strongly swollen ventrally, tapering apically; psembolus complex, with basal branch (bb), 2 leaf-like lobes (lll), broad median branch (mb) and lateral branch (lb), surrounded by numerous fiber structures.

Female. Same as male except as noted. Body length 1.62; habitus as in Fig. 10 A, C, E. Carapace 0.68 long, 0.55 wide. Abdomen: 0.85 long, 0.62 wide; dorsal scutum covering about 5 / 6 of abdomen length. Epigastric area (Figs 10 G, 6 C): with recurved, strongly sclerotized arches (sar). Endogyne (Fig. 6 D): with narrow, straight transverse sclerite (tsc); with anterior T-shaped slender sclerite (as) and posterior small globular structure (glo); transverse bars (tba) with pair of short lateral apodemes (ap).

Distribution.

Known only from the type locality, Yunnan Province, China (Fig. 1).