Trilacuna longling 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 : 23-25

Trilacuna longling Tong, Zhang & Li sp. n. Figs 13, 14, 15, 23C, D, 24I, J, 26E

Type material.

Holotype ♂ (SYNU-244), China, Yunnan Province, Baoshan City, Longling County, Xiaoheishan Natural Reserve, 17.II.2011, Zongxu Li & Luyu Wang. Paratypes: 2♀, 2♂ (SYNU-247), same data as holotype; 2♀ (SYNU-246), same data as holotype; 1♂ (SYNU-261), 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. wuhe sp. n., but can be distinguished by the narrow, blade-like lobes (bll) on embolus system (Fig. 14B, D, F), and the straight transversal sclerite (tsc) of the endogyne (Fig. 24J). T. wuhe sp. n. has 4 long, finger-like lobes (fll) and a cluster of long, thick “hairs” (lth) on embolus system (Fig. 17B) and has an “angled” transversal sclerite (tsc) of the endogyne (Fig. 25A).

Description.

Male. Body yellow-brown, chelicerae and sternum lighter, legs yellow. Habitus as in Fig. 13 A–C. Body length 1.69; carapace 0.81 long, 0.71 wide; abdomen 0.92 long, 0.71 wide. Carapace sides smooth, with only a few granulates, lateral margin rebordered (Fig. 13D). Eyes: ALE largest, PME smallest (Fig. 13D, G). ALE separated from edge of carapace by 1.2 diameters. Mouthparts as in Figs 13E, G, 26E. Sternum surface smooth, medial area strongly rugose, with many rows of small ridges (sri) on posterior area (Fig. 13E). Abdomen as in Fig. 13I. 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 a small hole (slh) between the posterior spiracles, surrounded by some long hairs (lha) (Fig. 13H). Palp (Figs 14, 23C, D): orange. 0.46 long (0.15, 0.08, 0.11, 0.12). Femur 0.15 long, 0.09 wide (width/length = 0.6) (Fig. 23C, D). Bulb oval, stout, tapering apically. Embolus system (Fig. 14B, D, F) with a leaf-shaped prolateral projection at base (blp), projection with numerous thin, short “hairs” at the margin (bth); with two narrow, blade-like lobes (bll); with a retrolateraly curved branch (lcb) and a long medial branch (lmb), the former (lcb) with a cluster of lateral “hairs” (lh), the latter (lmb) covered by numerous dorsal “hairs” (dbh); with rows of ventral broad lobes (vbl) retrolaterally.

Female. As in male except as noted. Habitus as in Fig. 15 A–C. Slightly larger than male. Body length 1.76; carapace 0.78 long, 0.67 wide; abdomen 1.01 long, 0.75 wide. Endites unmodified; sternum without rows of small ridges (sri) on posterior area. Genitalia. Ventral view (Fig. 24I): with recurved, strongly sclerotized arches (sar) anterior to the spiracles. Dorsal view (Fig. 24J): with narrow, 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.