Orchestina alata Tong & Li, 2025

Orchestina alata Tong & Li sp. nov.

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3

Material examined.

Holotype China • ♂ ( SYNU -1604 ), fogging; Yunnan, Mengla Co., Menglun Town , XTBG, primary tropical seasonal rain forest; 21°55.035'N, 101°16.500'E, 558 ± 17 m; 22.VII.2007; Zheng G. leg. GoogleMaps Paratypes. China • 1 ♂ ( SYNU -1605 ), same data as holotype GoogleMaps • 1 ♂ 1 ♀ ( SYNU -1477 –78), same data as holotype GoogleMaps • 2 ♂ 1 ♀ ( SYNU -1418 –20), same data as holotype GoogleMaps • 1 ♀ ( SYNU -F–4756 ), fogging; Nanshahe Vill. , seasonal rainforest; 21°36.201'N, 101°34.398'E, 826 ± 43 m; 14.VII.2012; Zhao Q. & Chen Z. leg. GoogleMaps

Diagnosis.

The new species is similar to Orchestina sinensis Xu, 1987 in the yellowish carapace and the pear-shaped bulbus, but can be distinguished by the sub-apical wing-shaped protrusions of bulbus (vs lacking, but with a crest; cf. Fig. 3 A, D View Figure 3 and Xu 1987: figs 5, 6), the basal large denticle of male endites (vs lacking; cf. Fig. 3 C View Figure 3 ) and the short column-shaped marking of epigaster (vs with a large reddish oval spot; cf. Fig. 2 H View Figure 2 and Xu 1987: fig. 4).

Description.

Male (holotype). Carapace (Fig. 1 A, D View Figure 1 ): 0.61 long, 0.41 wide; yellowish, oval in dorsal view, with some long setae; pars cephalica elevated in lateral view. Eyes (Fig. 1 A, C View Figure 1 ): well developed, PME largest; posterior eye row recurved from dorsal view. Clypeus (Fig. 1 C, D View Figure 1 ): margin unmodified, curved downwards in front view, sloping forward in lateral view. Sternum (Fig. 1 B View Figure 1 ): as long as wide, surface smooth, setae sparse, needle-like, evenly scattered. Mouthparts (Figs 1 B, C View Figure 1 , 3 C View Figure 3 ): chelicerae straight, anterior face unmodified; labium diamond-shaped, not fused to sternum, anterior margin not indented at middle; endites strongly sclerotized on outer margin, with serrula in single row, outer margin smoothly curved. Abdomen ovoid, 0.53 long; dorsum soft portions pale white, without color pattern. Legs: yellow, without color pattern; femur IV thickened, wider than femora I-III. Palp (Fig. 3 A – E View Figure 3 ): tibia not enlarged, length / width = 1.77, cymbium elongated ovoid; bulb pear-shaped in lateral view, with ventral side strongly protruding proximally, ca 1.72 × as wide as tibia; the sperm duct with four loops in prolateral view; embolus tapered, with sub-apical wing-shaped protrusions.

Female ( SYNU -1478 ). Same as male except as noted. Body: habitus as in Fig. 2 A – C View Figure 2 ; body length 1.36. Carapace (Fig. 2 E View Figure 2 ): 0.66 long, 0.49 wide. Abdomen: 0.69 long. Epigaster (Fig. 2 H View Figure 2 ): without special external features.

Endogyne (Fig. 3 F, G View Figure 3 ): with stout medial clavate sclerite (AUS), provided with pair of lateral protrusions (Pr); anterior receptaculum (ARe) triangular, semitransparent, slightly longer than AUS; posterior plate (PP) present, large.

Distribution.

Known only from the type locality.

Etymology.

The specific name is derived from the Latin alatus, meaning ‘ winged’, and refers to the subapical wing-shaped protrusions of the bulbus.