Zoological Studies

The Nominal Invalidity of the Cyprinid Genus, Parasinilabeo, with Descriptions of a New Genus and Species

Rui-Feng Su, Jun-Xing Yang and Gui-Hua Cui (2001) A new genus, Pararectoris Su, Yang and Cui, is designated based on the type species, Pararectoris assimilis (Wu and Yao, 1977). The new genus differs from 2 closely related genera, Sinocrossocheilus and Rectoris, by the following combination of characters: rostral cap joined directly with lower lip in mouth corners; the well-developed rostral cap covering both the upper lip and upper jaw, the prefringe of the rostral cap in the form of fimbriations with heavily hornified papillae; a row of tiny lobes on the dorsum of the upper jaw; prefringe of the lower lip with dense hornified papillae; and 7 branched dorsal fin rays. A new species, P. microps, is described on the basis of 6 specimens from the Taipingjiang River (a tributary of the Yuanjiang River, upper Yangtze River), Guizhou Province, China. This new species is distinguished by the following: only 1 pair of barbels (rostral barbels); the narrow papillated area of the lower lip extending to the posterior margin of the nostril; 41-45 lateral line scales; sixteen gill rakers on the outside of the 1st gill arch; and no black pigment on the area behind the hornified prefringe of the lower lip.