Taxonomic Revision and Redescription of Microphysogobio hsinglungshanensis, the type species of Microphysogobio Mori, 1934 (Cypriniformes: Cyprinidae).

Abstract

The genus Microphysogobio was established by Mori (1934) based on a single specimen (Microphysogobio hsinglungshanensis) collected in Luanhe River Basin, Xinglong County, Hebei Province, China. Since the genus characteristics were derived from its type species, M. hsinglungshanensis, the detailed description is essential. Besides, in order to distinguish M. hsinglungshanensis and M. chinssuensis, the description based on holotype and more specimens is needed. Microphysogobio hsinglungshanensis can be distinguished from all other congeners by the following combination of characters: mouth shallow arc-shaped and inferior; medial pad on lower lip inverted trapezoid, and usually grooved; barbel short, 6.9%-14.3% in head length; lateral line scales 38-39; ventral region between pectoral-fin origin and pelvic-fin origin scaleless; scales above lateral line 4-4.5; pre-dorsal scales 10-11; vertebrae 4\u2009+\u200932-34; caudal-fin membrane with two or three rows of irregular black spots. The characteristics of this genus were re-defined based on M. hsinglungshanensis in this study. This article is protected by copyright. All rights reserved.