Orchestina colubrina Liu, Henrard & Xu, 2019

Song, Chenxue, Tong, Yanfeng, Bian, Dongju & Li, Shuqiang, 2024, A survey of the genus Orchestina Simon, 1882 (Araneae, Oonopidae) from Xishuangbanna, China, with descriptions of five new species, Zoosystematics and Evolution 100 (1), pp. 255-277 : 255

Orchestina colubrina Liu, Henrard & Xu, 2019

Figs 2 , 3 , 7E , 7F

Orchestina colubrina Liu, Henrard & Xu, in Liu et al. 2019: 246, figs 10A-H, 11A-F.

Material examined.

1♂ (SYNU-841), China, Yunnan, Mengla Co., Menglun Town , XTBG, trunk traps, Paramichella baillonii plantation (21°54.772'N, 101°16.043'E), elev. 556 m, 16-31 May 2007, Zheng leg. ; 1♂ 1♀ (SYNU-845-846), same data as above ; 3♀ (SYNU-847-849), same data as above ; 1♂ (SYNU-843), XTBG, Fogging , same locality as above, 18 July 2007, Zheng leg. ; 1♂ (SYNU-842), XTBG, fogging, rubber plantation (21°54.463'N, 101°15.978'E), elev. 569 m, 21 July 2007, Zheng leg.; 1♂ (SYNU-844), XTBG, trunk traps, rubber plantation (21°55.551'N, 101°16.923'E), elev. 561 m, 1-15 June 2007, Zheng leg.

Type material (unexamined).

Holotype ♀, China, Jiangxi Province: Ji’an City, Jinggangshan County Level City, Ciping Town, Xingzhou Vill., forest, 26.519°N, 114.193°E, 514m, 3.X.2015, Keke Liu, Zeyuan Meng, Lei Zhang, Jianyun Wen and Tianming Wang leg. (OON 75). Paratype: 1♀, collected together with the holotype (OON 76).

Diagnosis.

Males of Orchestina colubrina is similar to O. multipunctata Liu, Xiao & Xu, 2016 (female unknown) in having a strongly swollen palpal tibia, the tube-shaped embolus and the same kind of modified setae in the labium, but can be distinguished by the triangle shaped bulb (Fig. 7E, F ) vs. drop-shaped ( Liu et al. 2016, fig. 8H, I). Females of O. colubrina resemble to those of O. yinggezui Tong & Li, 2011 in having the long lateral extensions (Ex) surrounding anterior uterine sclerite (AUS), but can be distinguished by the narrow cylindrical sclerite (AUS) having Y-shaped lateral protrusions (Fig. 3H, I ), vs. AUS with circular protrusions in O. yinggezui ( Tong and Li 2011: fig. 5H, 10B).

Description.

Male (SYNU-841). Total length 1.33, carapace length 0.72, carapace width 0.48, abdomen length 0.63. Habitus as in Fig. 2A, B . Color in alcohol: pale yellow. Carapace oval, with net-shaped pattern, pars cephalica strongly elevated in lateral view, with rounded posterolateral corners. Clypeus (Fig. 2D, F ) margin unmodified, curved downwards in front view, sloping forward in lateral view. Sternum (Fig. 2E ) longer than wide, with marginal band of tiny dark spots, surface smooth. Mouthparts (Fig. 2D, F ): chelicerae straight, with a single distal long setae; labium rounded, not fused to sternum, anterior margin not indented at middle, with five modified, leaf-shaped setae; endites not strongly sclerotized, without serrula. Abdomen ovoid, with gray ^-shaped pattern. Genitalia (Fig. 7E, F ): tibia of palp strongly enlarged, length/width ratio = 1.41, cymbium small; bulb triangle-shaped, about 0.76 times as wide as tibia; tapering apically; sperm duct not strongly sclerotized, barely visible through cuticle; embolus slender, tube-shaped, flattened at tip.

Female (SYNU-846). Same as male except as noted. Body: habitus as in Fig. 3A, B ; body length 1.36. Carapace: 0.66 long, 0.51 wide. Clypeus (Fig. 3F ): anterior margin straight. Mouthparts: chelicerae shorter; endites simple, with serrula. Abdomen: 0.67 long. Epigaster (Fig. 3G, H ): without special external features; internal parts visible through integument. Endogyne (Fig. 3I ): with medial cylindrical sclerite (AUS), anterior part of cylindrical sclerite (AUS) with pair of Y-shaped protrusions (Pr); AUS surrounded by narrow hoop (Ex).

Distribution.

China (Jiangxi, Yunnan).

Figures

Figure 2. Orchestina colubrina Liu, Henrard & Xu, 2019, male (SYNU- 841). A, B. Habitus, dorsal and ventral views; C-F. Prosoma, dorsal, lateral, ventral and anterior views (arrows show the single distal seta). Scale bars: 0.4 mm (A, B); 0.2 mm (C-F).

Figure 3. Orchestina colubrina Liu, Henrard & Xu, 2019, female (SYNU- 846). A, B. Habitus, dorsal and lateral views; C-F. Prosoma, dorsal, lateral, ventral and anterior views; G. Epigaster, ventral view; H-I. Endogyne, ventral and dorsal views. Abbreviations: AUS = anterior uterine sclerite; Ex = dorsolateral extension; Pr = protrusion. Scale bars: 0.4 mm (A, B); 0.2 mm (C-G); 0.1 mm (H, I).

Figure 7. Orchestina menglun sp. nov., A-D, holotype male; Orchestina colubrina Liu, Henrard & Xu, 2019, E, F, male (SYNU- 841). A, E. Left palp, prolateral view; B, F. Left palp, retrolateral view; C. Left palp, dorsal view; D. Endites and labium, ventral view. Abbreviation: Se = serrula. Scale bars: 0.1 mm.