Speocera xuanson Li & Li, 2019

Tong, Yanfeng, Li, Fengyuan, Song, Yang, Chen, Haifeng & Li, Shuqiang, 2019, Thirty-two new species of the genus Speocera Berland, 1914 (Araneae: Ochyroceratidae) from China, Madagascar and Southeast Asia, Zoological Systematics 44 (1), pp. 1-75 : 66

Speocera xuanson Li & Li sp. nov. ( Figs 51–52 , 57I–J )

Material examined. Holotype ♂ ( IZCAS), Vietnam, Xuan Son National Park, Lun Cave (21º7.022′N, 104º57.443′E), elev. 398 m, 16.X.2012, leg. H. Zhao. Paratypes 2♂ 3♀ ( IZCAS), same data as holotype .

Etymology. The specific name is derived from the type locality; noun.

Diagnosis. The new species is similar to S. bicornea Tong & Li, 2007 , but males can be distinguished by the long associated sclerites of the embolus ( Figs 51A–B ) and females by the long afferent spermathecae extending to the upper sides of the abdomen ( Figs 52B, D ). S. bicornea males do not have the long associated sclerites of the embolus, and the females have short afferent spermathecae, not extending to upper sides of the abdomen (Tong & Li, 2007: fig. 7).

Description. Male. Total length 1.10; carapace length 0.48; carapace width 0.43; abdomen length 0.58; abdomen width 0.40. Prosoma: carapace pyriform, narrowing gradually anteriorly; shiny, light yellow, suffused with brownish pattern ( Fig. 52C ); pars cephalica flat; fovea not visible. Sternum yellow, suffused with brown, as long as wide. Endites light yellow with serrula; labium light yellow. Clypeus nearly vertical; short. Chelicerae light yellow, laterally strongly excavated, with a small horn-shaped apophysis; promargin with a series of six teeth reaching the lamina; retromargin with two very small denticles ( Figs 57I–J ). Eyes: six contiguous eyes surrounded by black pigmentation; PME smallest; PLE largest ( Fig. 52C ). Opisthosoma oval; light brown. Legs missing. Genitalia ( Fig. 51 ). Palpal femur long; palpal tibia as long as cymbium ( Figs 51A–B ). Cymbium conical, with large prolateral extension basally. Bulb spherical, wider than high. Embolus wide, dark and basally with one long associated sclerite; sperm duct initially very wide, gradually narrowing distally ( Fig. 51D ).

Female. Total length 1.25; carapace length 0.51; carapace width 0.43; abdomen length 0.68; abdomen width 0.46. Similar to male in color and general features ( Figs 52D–E ) but larger. Chelicerae unmodified. Legs I, II, III missing; leg IV 2.06 (0.59, 0.15, 0.58, 0.42, 0.32). Genitalia. Internal genitalia with afferent spermathecae long, extending past the sides of the abdomen ( Fig. 52B ); spermathecae oval ( Fig. 52A ).

Distribution. Known only from the type locality.

Figures

Figure 51. Speocera xuanson Li & Li sp. nov., holotype, male. A. Left palp, prolateral view. B. Left palp, retrolateral view. C. Left palp, dorsal view. D. Left palp, retrolateral view, cleared in lactic acid. Scale bars=0.05mm.

Figure 52. Speocera xuanson Li & Li sp. nov. A, B, D, E. Paratype, female. C. Holotype, male.A. Genitalia, dorsal view. B. Genitalia, ventral view. C. Habitus, dorsal view. D. Habitus, dorsal view. E. Habitus, ventral view. Scale bars: A–B=0.05mm; C–E=0.30mm.

Figure 57. Male chelicerae of Speocera spp. A–E, G, I. Anterior view. F, H, J. Lateral view. A. S. payakumbuh Li & Li sp. nov. B. S. suea Li & Li sp. nov. C. S. tubularis Li & Li sp. nov. D. S. trusmadi Li & Li sp. nov. E–F. S. xiaoxiaoae Li & Li sp. nov. G–H. S. zhigangi Li & Li sp. nov. I–J. S. xuanson Li & Li sp. nov. Scale bars=0.1mm.