Relictocera qiyi Li & Li, 2017

Liu, Chang, Li, Fengyuan, Li, Shuqiang & Zheng, Guo, 2017, Five new genera of the subfamily Psilodercinae (Araneae: Ochyroceratidae) from Southeast Asia, Zoological Systematics 42 (4), pp. 395-417 : 403-408

Relictocera qiyi Li & Li , sp. nov. ( Figs 7–8 , 15 )

Material examined. Holotype male, Vietnam, Thua Thien Hue Province , Bach Ma National Park, Da Dung Village (16º13.203’N, 107º52.944’E; elev. 69m), 26 August 2015, leg. Q. Zhao, Y. Li & Z. Chen. Paratypes. 1 male, 2 females, same data as holotype ( IZCAS) .

Etymology. The species name is a noun in apposition derived from the Chinese pinyin "qíyì" ("strange") and refers to the unique trifurcate projection on the male clypeus.

Diagnosis. The male of this species is easily recognized by the distinctly slender elongate cymbial protrusion, the bifurcate conductor, and the flat embolus. The female is diagnosed by the single pair of slender elongate spermathecae.

Description. Male (holotype). Total length 2.63; carapace 0.65 long, 0.76 wide; abdomen 1.36 long, 0.56 wide. Carapace round, yellow, with three longitudinal brown bands of which middle band 3–4 times wider than laterals ( Fig. 8C ). Fovea shallow, dark brown. Anterior margin of thoracic region distinctly elevated. Chelicerae light yellow. Cheliceral promargin with dentoid lamina and no teeth, retromargin with one small denticle, posterior surface of fang with 19 small denticles. Clypeus light yellow, slanting with trifurcate projection medially and two horn-like projections basally ( Figs 8 C– D). Labium yellow, slanting. Sternum yellow, with a pair of irregular brown bands. Abdomen elongate, yellow, with brown bands dorsally and ventrally. Legs brown, femur and tibia each with white annulation; measurements: I 13.12 (3.60, 0.28 3.88, 4.30, 1.06), II 8.85 (2.50, 0.27, 2.49, 2.78, 0.81), III 6.99 (2.00, 0.27, 2.05, 2.02, 0.65), IV 6.83 (1.98, 0.28, 1.88, 2.02, 0.67). Palp ( Figs 7 A–D): tibia and cymbium slender; tibia distinctly more than twice as long as cymbium; cymbium with slender apical protrusion nearly as long as cymbium; bulb yellow, oval; embolus flattened, conductor bifurcate, embolus and conductor both arising distally from bulb but separated basally.

Female. Similar to male in coloration and general features, but slightly smaller and lacking trifurcate clypeal projection. Measurements: total length 2.10; carapace 0.63 long, 0.70 wide; abdomen 1.34 long, 0.76 wide. Leg measurements: I 10.56 (2.75, 0.25, 3.06, 3.44, 1.06), II 6.77 (1.82, 0.25, 1.92, 2.00, 0.78), III 5.14 (1.40, 0.23, 1.41, 1.48, 0.62), IV 8.39 (2.25, 0.25, 2.40, 2.61, 0.88). External genitalic area with pair of translucent lobes laterally ( Fig. 8B ). Vulva with pair of slender elongate spermathecae ( Fig. 8A ).

Distribution. Known only from the type locality ( Fig. 15 ).

Figures

Figure 7. Relictocera qiyi Li & Li, sp. nov., male holotype. A. Palp, ventral view. B. Palpal bulb, prolateral view. C. Palp, prolateral view. D. Palp, retrolateral view. Scale bars: B–D=0.1mm.

Figure 8. Relictocera qiyi Li & Li, sp. nov., male holotype and female paratype. A. Spermathecae, dorsal view. B. Female epigyne, ventral view. C. Male habitus, retrolateral view. D. Male habitus, dorsal view. E. Female habitus, dorsal view. F. Female habitus, ventral view. Scale bars: A=0.05mm; C–F =0.5mm.

Figure 15. Known distribution of six new ochyroceratids from Southeast Asia. 1. Sinoderces nawanenis Li & Li, sp.nov. 2. Qiongocera hongjunensis Li & Li, sp. nov. 3. Relictocera qiyi Li & Li, sp. nov. 4. Luzonacera duan Li & Li, sp. nov. 5. Luzonacera chang Li & Li, sp. nov. 6. Thaiderces jian Li & Li, sp. nov.