Orchestina lini 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 lini Tong & Li sp. nov.

Material examined.

Holotype China • ♂ ( SYNU -F-055 ), sifting forest leaf litter; Xizang, Linzhi City, Motuo Co., near Yadong Vill. ; 29°20.605'N, 95°20.807'E, 1360 ± 5 m; 6.VIII.2013; L. Lin leg. Paratypes. China • 1 ♀ ( SYNU -F-089 ), sifting forest leaf litter; Xizang, Linzhi City, Pome Co., Gangxiang Nature Reserve ; 29°51.076'N, 95°35.315'E, 2750 ± 10 m; 31.VII.2013; L. Lin leg. • 1 ♀ ( SYNU -F-090 ), sifting forest leaf litter; Xizang, Linzhi City, Pome Co., Near Zhamu Town ; 29°52.205'N, 95°45.894'E, 2700 ± 16 m; 18.VII.2013; L. Lin leg.

Etymology.

The specific name is named after the collector, Linghui Lin.

Diagnosis.

The new species is similar to O. bialata Liu, Xiao & Xu, 2016 in the shape of the bulb, but can be distinguished by the sperm duct abruptly bent in the middle section (Fig. 2 A, arrow) vs. smoothly curved ( Liu et al. 2019: fig. 7 A), the round labium (Fig. 1 G) vs. spade-shaped, with inverted Y-shaped sclerotized pattern ( Liu et al. 2019: fig. 6 B), and the epigaster without special external features (Fig. 3 H) vs. with large triangular plate ( Liu et al. 2016: fig. 5 B, F). The new species is also similar to O. clavulata Tong & Li, 2011 in the female genitalia, but can be distinguished by the carapace without a net-shaped pattern (Figs 1 A, 3 A) vs. with a net-shaped pattern ( Tong and Li 2011: fig. 1 C, D).

Description.

Male (holotype). Body: habitus as in Fig. 1 A, C, D; body length 1.04. Carapace (Fig. 1 B): 0.57 long, 0.46 wide; yellowish, oval in dorsal view, without net-shaped pattern, with some long setae, pars cephalica elevated in lateral view. Eyes (Fig. 1 B, F): well developed, PME largest; posterior eye row recurved from above. Clypeus (Fig. 1 E, F): margin unmodified, curved downwards in front view, sloping forward in lateral view. Sternum (Fig. 1 G): longer than wide, surface smooth, setae sparse, needle-like, evenly scattered. Mouthparts (Figs 1 F, G, 2 D): chelicerae straight, anterior face unmodified; labium rounded, not fused to sternum, anterior margin not indented at middle; endites strongly sclerotized on outer margin, with serrula in single row. Abdomen (Fig. 1 A, C, D): 0.49 long; ovoid, without net-shaped pattern. Legs: yellow, without color pattern; femur IV thickened, wider than femora I-III. Palp (Fig. 2 A – C): tibia slightly enlarged, length / width = 1.74, cymbium small; bulb pear-shaped in lateral view, with ventral side strongly protruding proximally, about 1.92 times as wide as tibia; the sperm duct abruptly bent in the middle section; embolus tapered, at almost right angle with long axis of bulbus.

Female ( SYNU -F-090 ). Same as male except as noted. Body: habitus as in Fig. 3 A, C, E; body length 1.44. Carapace (Fig. 3 B): 0.64 long, 0.49 wide. Abdomen: 0.82 long. Epigaster (Figs 2 E, 3 H): without special external features. Endogyne (Fig. 2 F): with stout medial clavate sclerite (AUS), provided with pair of short lateral protrusions (Pr); anterior receptaculum (ARe) rounded, semitransparent, slightly longer than AUS; posterior plate (PP) present, large.

Distribution.

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