Trilacuna wuhe Tong, Zhang & Li

Tong, Yanfeng, Chen, Haifeng, Bai, Shuchong, Zhang, Zhisheng & Li, Shuqiang, 2019, Seven new species of the genus Trilacuna Tong & Li, 2007 from Yunnan, China (Araneae, Oonopidae), ZooKeys 821, pp. 11-44 : 25-29

Trilacuna wuhe Tong, Zhang & Li sp. n. Figs 16, 17, 18, 22 G–I, 25A, B, 26F

Type material.

Holotype ♂ (SYNU-255), China, Yunnan Province, Baoshan City, Tengchong County, Wuhe Town, Xiaodifang Village, 27.II.2011, Zongxu Li & Luyu Wang. Paratypes: 3♀, 1♂ (SYNU-256), same data as holotype.

Etymology.

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

Diagnosis.

The new species is similar to T. xinping sp. n., but males can be distinguished by the numerous rows of small ridges (sri) in posterior part of sternum (Fig. 16E), four long, finger-like lobes (fll) and a cluster of long, thick “hairs” (lth) on embolus system (Fig. 17B), and the females by the “angled” transversal sclerite (tsc) of the endogyne (Fig. 25A). Trilacuna xinping sp. n. males have a cluster of short setae (css) in posterior part of sternum (Fig. 19E), comb-shaped lobes (csl) on embolus system (Fig. 20B), and females there is no the transversal sclerite (tsc) (Fig. 25C).

Description.

Male. Body yellow-brown, chelicerae and sternum lighter, legs yellow. Habitus as in Fig. 16 A–C. Body length 1.62; carapace 0.82 long, 0.69 wide; abdomen 0.84 long, 0.64 wide. Carapace sides granulate, lateral margin rebordered (Fig. 16D). Eyes: ALE separated from edge of carapace by 1.2 diameters (Fig. 16D, G). Mouthparts as in Figs 16E, G, 26F. Sternum smooth, with many rows of small ridges (sri) on posterior area (Fig. 16E). Abdomen as in Fig. 16I. Leg spination (all spines longer than segment width): legs I-II: tibia: v2-2-2-2-0, metatarsus: v2-2-0. Genitalia. Sperm pore situated at level of anterior spiracles; with cluster of long hairs (clh) between the posterior spiracles (Fig. 16H). Palp (Figs 17, 22 G–I): orange. 0.46 long (0.15, 0.08, 0.11, 0.12). Femur 0.15 long, 0.09 wide (width/length = 0.6) (Fig. 22G, I). Bulb oval, stout, tapering apically. Embolus system (Fig. 17B, D, F) with four long, finger-like lobes (fll), two distal broad lobes (dbl), and a cluster of long, thick “hairs” (lth) prolaterally; with a retrolateral curved branch (lcb) and a long medial branch (lmb) dorsally, all these structures surrounded by numerous hair-like structures.

Female. As in male except as noted. Habitus as in Fig. 18 A–C. Slightly larger than male. Body length 1.81; carapace 0.79 long, 0.69 wide; abdomen 1.05 long, 0.75 wide. Endites unmodified; sternum surface slightly rugose on middle area, without rows of small ridges (sri) on posterior area. Genitalia. Ventral view (Fig. 25A): with recurved, strongly sclerotized arches (sar) anterior to the spiracles. Dorsal view (Fig. 25B): with narrow, nearly “angled” transversally elongated sclerite (tsc); with an anterior T-shaped sclerite (as) and a posterior small globular structure (glo). Transverse bars (tba) with two short, lateral apodemes (ap).

Distribution.

Known only from the type locality.