TL;DR: Yaoshania, new genus, is described with Protomyzon pachychilus as type species and distinguished from othergenera of Balitoridae by its larger gill opening, a lip lamina at angle of mouth, and the rostral fold with four notches toaccommodate rostRAL barbels.
Abstract: Yaoshania, new genus, is described with Protomyzon pachychilus as type species. Yaoshania is distinguished from othergenera of Balitoridae by its larger gill opening, a lip lamina at angle of mouth, and the rostral fold with four notches toaccommodate rostral barbels. A lectotype is designated for Y. pachychilus. Erromyzon kalotaenia, new species, is de-scribed from Guangxi, China. It is distinguished from other species of Erromyzon by the very reduced median lobe of therostral fold; the lower lip distinctly covered with melanophores; and the color pattern on the flank. A key to the species of Erromyzon is provided.
TL;DR: The new species Erromyzon damingshanensis is distinguished from the other species of the genus in having a crescentic median lobe of the rostral fold and postlabial groove broadly interrupted medially.
Abstract: Erromyzon damingshanensis, a new sucker loach is described from the Pearl River drainage in Guangxi, China. The new species Erromyzon damingshanensis is distinguished from the other species of the genus in having a crescentic median lobe of the rostral fold, rostral barbels shorter than rostral fold; postlabial groove broadly interrupted medially, seven branched dorsal fin rays, 16 branched pectoral fin rays, lateral line scales 88–95, caudal peduncle depth larger than its length; body with 12 irregular bars on flank, interrupted on dorsum.