Orchestina caixiaae Tong & Li 2025, sp. nov.

Orchestina caixiaae Tong & Li sp. nov. Figs 7, 8, 9 Type material. Holotype China • ♂ (SYNU -1588), fogging; Yunnan, Mengla Co., Menglun Town, XNNR, 55 Km., the secondary forest on the mountain top; 21°57.978'N, 101°12.167'E, 842 ± 14 m; 18.VIII.2011; Zheng G., Zhao Q. & Gao C. leg. Paratypes. China • 1 ♂ (SYNU -F-3956), same data as holotype • 1 ♀ (SYNU -F-4418), same data as holotype • 1 ♂ (SYNU -1589), fogging; XNNR, the pomelo forest beside rice field; 21°54.116'N, 101°16.15'E, 549 m; 18.VIII.2018; Bai Z., Yu H., Yang Y. & Chen Z. leg. • 1 ♂ (SYNU -1590), fogging; XNNR, 55 Km., the valley forest beside the artificial fishpond; 21°57.883'N, 101°12.147'E, 839 ± 18 m; 15.VIII.2011; Zheng G., Zhao Q. & Gao C. leg. • 4 ♀ (SYNU -F-4364 –67), same data as above • 1 ♂ (SYNU -F-3957), same data as above. Additional material. China • 1 ♀ (SYNU -F-4359), fogging; Yunnan, Mengla Co., Xiaolongha Vill., Biodiversity corridor, valley forest; 21°24.253'N, 101°36.324'E, 761 ± 16 m; 15.VI.2013; Zhao Q. & Gao C. leg. • 1 ♀ (SYNU -F-4419), same data as above • 1 ♀ (SYNU -F-4356), fogging; XNNR, 55 Km., about 1 km up the hill, seasonal rainforest; 21°57.935'N, 101°12.305'E, 781 ± 17 m; 13.VIII.2011; Zheng G., Zhao Q. & Gao C. leg. • 1 ♀ (SYNU -F-4441), fogging; Xiaolongha Vill., Biodiversity corridor, seasonal rainforest; 21°24.26'N, 101°37.296'E, 653 ± 15 m; 27.VI.2012; Zhao Q. & Chen Z. leg. • 2 ♀ (SYNU -F-4728 –29), same data as above • 1 ♀ (SYNU -F-4629), fogging; XNNR, 48 Km., artificial forest; 21°53.997'N, 101°16.957'E, 593 ± 18 m; 11.VIII.2011; Zheng G., Zhao Q. & Gao C. leg. • 2 ♀ (SYNU -F-4763 –64), fogging; XNNR, 200 m east of the Lvshilin, limestone monsoon rainforest; 21°54.617'N, 101°16.843'E, 738 ± 17 m; 7.VIII.2011; Zheng G., Zhao Q. & Gao C. leg. Diagnosis. The new species is similar to Orchestina lini Tong & Li, 2025 in the non-enlarged palpal tibia and the abruptly bent sperm duct, but can be distinguished by the short tube-shaped embolus (vs very long; cf. Fig. 9 A, B, D and Zhou et al. 2025: fig. 2 A – C), the rectangular labium (vs rounded; cf. Fig. 9 C and Zhou et al. 2025: fig. 1 G), and the long medial clavate sclerite of endogyne (vs short; cf. Fig. 9 F and Zhou et al. 2025: fig. 2 F). Description. Male (holotype). Body: habitus as in Fig. 7 A – C; body length 1.13. Carapace (Fig. 7 E): 0.55 long, 0.41 wide. Eyes (Fig. 7 D, E): well developed, PME largest. Clypeus as in Fig. 7 D, G. Sternum as in Fig. 7 F. Mouthparts (Figs 7 D, F, 9 C): labium rectangular, with anterior margin anteriorly projecting at middle, not fused to sternum; endites strongly sclerotized on outer margin, with serrula in single row, outer margin straight. Abdomen ovoid, 0.58 long; dorsum soft portions pale white, without color pattern. Legs: yellow, without color pattern; femur IV thickened, wider than femora I-III. Palp (Fig. 9 A, B, D): tibia not enlarged, length / width = 2.04, cymbium elongated ovoid; bulb pear-shaped in lateral view, with ventral side strongly protruding proximally, ca 2.23 × as wide as tibia; the sperm duct abruptly bent in the middle section, with two loops in prolateral view; embolus tapered, tube-shaped. Female (SYNU -F-4418). Same as male except as noted. Body: habitus as in Fig. 8 A – C; body length 1.15. Carapace (Fig. 8 E, G): 0.56 long, 0.45 wide. Abdomen: 0.61 long. Epigaster (Fig. 8 H): without special external features. Endogyne (Fig. 9 E, F): with long medial clavate sclerite (AUS), provided with pair of short 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 named after the collector, Caixia Gao.