Orchestina wuzu 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 wuzu Tong & Li sp. nov.

Material examined.

Holotype China • ♂ ( SYNU -F-056 ), ground searching; Xizang, Linzhi City, Nang Co., Dongga Town , Wuzu Vill. ; 29°00.478'N, 93°13.547'E, 3062 ± 3 m; 11.VIII.2014; Y. Li leg. Paratypes. China • 20 ♂ 12 ♀ ( SYNU -F-057 –088), 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 O. apiculata Liu, Xiao & Xu, 2016 , O. dapojing Tong & Yang, 2024 and O. flagella Saaristo & van Harten, 2006 in the shape of the bulb and the slender embolus, but can be distinguished by the median protrusion of male clypeus (Fig. 4 F, arrow) vs. lacking ( Saaristo and Van Harten 2006: fig. 52; Liu et al. 2016: fig. 1 A, D; Wang et al. 2024 a: fig. 1 F), and the two small closely apposed semicircular sclerotized pockets (Figs 5 E, F, 6 H) vs. lacking in O. apiculata and O. dapojing ( Liu et al. 2016: fig. 2 C; Wang et al. 2024 a: fig. 3 G), and lacking, but with a glossy, banana-shaped transverse area in O. flagella ( Saaristo and Van Harten 2006: fig. 54).

Description.

Male (holotype). Body: habitus as in Fig. 4 A, C, E; body length 1.12. Carapace (Fig. 4 B): 0.50 long, 0.49 wide; orange brown, oval in dorsal view, with reticulate, net-shaped pattern, pars cephalica slightly curved in lateral view. Eyes (Fig. 4 B, F): well developed, PME largest; posterior eye row recurved from above. Clypeus (Fig. 4 F, G): curved downwards in front view, strongly sloping forward in lateral view; with a small median protrusion. Sternum (Fig. 4 D): longer than wide, with dark brown patches; setae sparse, surface smooth. Mouthparts (Figs 4 D, F, 5 D): chelicerae straight and long, anterior face unmodified; labium elongated, not fused to sternum, anterior margin not indented at middle, lateral margins slightly sclerotized; endites unsclerotized, outer margin with serrula. Abdomen (Fig. 4 A, C, E): 0.68 long; ovoid, with dense, gray net-shaped pattern and narrow pale chevron patterns. Legs: yellow, without color pattern; femur IV thickened, wider than femora I-III. Palp (Fig. 5 A – C): tibia of palp strongly enlarged, length / width = 1.75, cymbium small; bulb ovoid, about 1.33 times as wide as tibia, with distal part leading to embolus stout tube-shaped and inserted medially; the sperm duct barely visible through cuticle; embolus slender, whip-like, bent inwards.

Female ( SYNU -F-058 ). Same as male except as noted. Body: habitus as in Fig. 6 A, C, E; body length 1.48. Carapace (Fig. 6 B): 0.69 long, 0.56 wide. Chelicerae shorter than in males. Abdomen: 0.79 long. Epigaster (Figs 5 E, 6 H): basally with two small semicircular sclerotized pockets (Po), close to each other. Endogyne (Fig. 5 F): with medial tubular sclerite (AUS), extending anteriorly, then flipped posteriorly, ending near epigastric furrow; anteriorly with two lateral protrusions (Pr); dorsolateral extension (Ex) interrupted anteriorly.

Distribution.

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