Wolongia Zhu, Kim

Wan, Jin-Long & Peng, Xian-Jin, 2013, The spiders of the genus Wolongia Zhu, Kim & Song, 1997 from China (Araneae: Tetragnathidae), Zootaxa 3691 (1), pp. 87-134 : 88

Genus Wolongia Zhu, Kim & Song, 1997

Wolongia Zhu, Kim & Song, 1997: 1.

Type species: Wolongia guoi Zhu, Kim & Song, 1997

Diagnosis. The genus Wolongia species can be distinguished from all other tetragnathid genera by the following combination of characters: 1) absence of denticles between two cheliceral fang furrows in both male and female; 2) absence of brush of long trichobothria at base of femur IV; 3) dorsal surface of male coxa IV with rows of cusps, book lung with a stridulatory file (absent in female); 4) cymbium with an ectomedian process and an ectobasal process (CEMP and CEBP in Fig. 5 C); 5) at least one third portion of genital bulb hidden in cymbium in retrolateral view ( Fig. 5 B); 6) embolic base exposed ( Fig. 5 A); 7) female palpal tibia without long trichobothria; 8) fertilization duct simple and slightly curved; 9) copulatory duct simple, with few switchbacks. This genus is very similar to Nanometa simon, 1908 in male palp, stridulatory organs, but differs in: 1) absence of denticles between two cheliceral fang furrows versus present in Nanometa (Álvarez-Padilla and Hormiga 2011: Fig. 88D); 2) at least one third of genital bulb hidden in cymbium in retrolateral view versus obviously separated from cymbium in Nanometa (Álvarez-Padilla and Hormiga 2011: Fig. 90D); 3) copulatory duct tubular versus modified as sac in Nanometa (Álvarez-Padilla and Hormiga: Fig. 74B). This genus also resembles Okileucauge Tanikawa, 2001 in habitus and coloration, but can be distinguished from the latter by: 1) cymbium with an ectomedian process which is absent in Okileucauge ; 2) embolic base exposed while hidden in conductor in Okileucauge (Zhu et al. 2003: fig. 155D); 3) female palpal tibia without long trichobothria which are present in Okileucauge (Zhu et al. 2003: fig. 158C); 4) fertilization duct slightly curved versus heavily coiled and sac-shaped (Zhu et al. 2003: fig. 283E).

Description. Both eye rows recurved, posterior eye row slightly wider. Anterior and posterior lateral eyes touching. Eyes without canoe tapetum (Peng et al. 2009). Chelicerae with 3 promarginal and 4 or 5 retromarginal teeth. Labium wider than long. Femur without trichobothria. Most patella with two dorsal macrosetae (one curved, the other straight). Tibia with one or two dorsal macrosetae. Prolateral surface of metatarsus I and II with one row of regular longer straight setae, which are stronger and thicker in W. guoi and W. wangi ( Figs 2 A–I, 33E). Leg formula: I, II, IV, III. Abdomen oval, widest medially. Dorsum silvery white or yellowish, with a wider longitudinal median stripe. Male: coxa IV dorsal surface with rows of cusps; book lung with a stridulatory file; palp with small paracymbium (P in Fig. 5 B); cymbium with an ectomedian process and an ectobasal process; subtegulum not exposed and situated on the dorsal side of tegulum; ventral surface of center of conductor smooth; embolus coiled and its base exposed. Female: epigynum weakly sclerotized and its posterior margin slightly convex; spermatheca sclerotized or membranous; fertilization duct slightly curved; copulatory duct with few switchbacks.

Figures

FIGURE 2. Male metatarsus I, prolateral view. A, Wolongia bicruris n. sp.; B, Wolongia bimacroseta n. sp.; C, Wolongia erromera n. sp.; D, Wolongia foliacea n. sp.; E, Wolongia guoi Zhu, Kim & Song, 1997; F, Wolongia mutica n. sp.; G, Wolongia odontodes Zhao, Yin & Peng, 2009; H, Wolongia renaria n. sp.; I, Wolongia tetramacroseta n. sp. Scale bars: 0.5 mm.

FIGURE 5. Wolongia bicruris n. sp., male holotype. A, palp, ventral view; B, palp, retrolateral view; C, palp, dorsal view; D, chelicerae, posterior view. Scale bars: 0.1 mm.