Orchestina yigong Tong & Li, 2025

Zhou, Yang, Tong, Yanfeng, Bian, Dongju & Li, Shuqiang, 2025, Three new species of Orchestina Simon, 1882 (Araneae, Oonopidae) from Xizang, China, ZooKeys 1239, pp. 333-347 : 333-347

Orchestina yigong Tong & Li sp. nov.

Material examined.

Holotype China • ♂ ( SYNU -F-3702 ), sifting forest leaf litter; Xizang, Linzhi City, Pome Co., Yigong Town (S 305 provincial highway 32 km away) ; 30°14.548'N, 94°51.303'E, 2175 m; 2.VIII.2017; M. Xu leg.

Etymology.

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

Diagnosis.

The new species is similar to O. apiculata Liu, Xiao & Xu, 2016 and O. dapojing Tong & Yang, 2024 in the shape of the bulb and the long, whip-like embolus, but can be distinguished from O. apiculata by the carapace with a net-shaped pattern (Fig. 7 A, B) vs. lacking ( Liu et al. 2016: fig. 1 A) and the palpal tibia narrower than the bulb (Fig. 8 A, B) vs. distinctly wider than the bulb ( Liu et al. 2016: fig. 2 A, B); can be distinguished from O. dapojing by the clypeus with a small inverted drop-shaped protrusion (Fig. 7 F) vs. lacking ( Wang et al. 2024 a: fig. 1 A, B) and the long chelicerae (Fig. 7 F) vs. very short ( Wang et al. 2024 a: fig. 1 F).

Description.

Male (holotype). Body: habitus as in Fig. 7 A, C, E; body length 1.10. Carapace (Fig. 7 B): 0.65 long, 0.52 wide; yellowish brown, oval in dorsal view, with net-shaped pattern, pars cephalica flat in lateral view. Eyes (Fig. 7 B, F): well developed, nearly equal-sized; posterior eye row recurved from above. Clypeus (Fig. 7 D, F): curved downwards in front view, sloping forward in lateral view; with a small inverted drop-shaped protrusion. Sternum (Fig. 7 G): heart-shaped, with marginal band and median dark brown patches; setae sparse. Mouthparts (Figs 7 F, G, 8 D): chelicerae straight and long, anterior face unmodified; labium rounded, not fused to sternum, anterior margin not indented at middle; endites unsclerotized, outer margin with serrula. Abdomen (Fig. 7 A, C, E): 0.65 long; ovoid, with gray net-shaped pattern and several broad chevron patterns. Legs: yellow, without color pattern; femur IV thickened, wider than femora I-III. Palp (Fig. 8 A – C): tibia strongly enlarged, length / width = 1.65, cymbium small; bulb pyriform, strongly enlarged, about 1.68 times as wide as tibia; the sperm duct thin, strongly curved; embolus nearly as long as bulb, whip-like, bent inwards.

Female. Unknown.

Distribution.

Known only from the type locality (Fig. 9).