系统进化与生物地理学（杨君兴）知识库

Yaoshania, new genus, is described with Protomyzon pachychilus as type species. Yaoshania is distinguished from other genera of Balitoridae by its larger gill opening, a lip lamina at angle of mouth, and the rostral fold with four notches to accommodate rostral barbels. A lectotype is designated for Y. pachychilus. Erromyzon kalotaenia, new species, is described from Guangxi, China. It is distinguished from other species of Erromyzon by the very reduced median lobe of the rostral fold; the lower lip distinctly covered with melanophores; and the color pattern on the flank. A key to the species of Erromyzon is provided.