Sarcocheilichthys, Bleeker, 1860

An, Chang-Ting & Shen, Jian-Zhong, 2020, Sarcocheilichthys vittatus, a new species of gudgeon (Teleostei: Cyprinidae) from the Poyang Lake Basin in Jiangxi Province, South China, Zootaxa 4768 (2), pp. 201-220 : 216-217

Key to the Chinese species of Sarcocheilichthys .

1a. A longitudinal black band extending from anterior tip of snout across orbit along with lateral line to caudal fin base....... 2

1b. No black bands extending from anterior tip of snout across orbit along with the lateral line to the caudal fin base.......... 4

2a. Lateral lobes of lower lip extended anteriorly nearly reaching to anterior edges of lower jaw, with black spots along dorsal-fin base.................................................................................... S. caobangensis

2b. Lateral lobes of lower lip restricted only to side of lower jaw, no black spots along the dorsal-fin base...................3

3a. 34-36 lateral-line scales, one pair of barbels........................................................ .. S. parvus

3b. 37-38 lateral-line scales, no barbels................................................................ S. vittatus

4a. Four black wide bands on lateral of the body, base of unbranched dorsal-fin ray soft................................ 5

4b. No black wide band on lateral of the body, a deep dark black vertical bar on the shoulder, several irregular black vertical blotches on lateral body.................................................................................6

5a. Pharyngeal teeth in one row, circumpeduncular scales 16............................................... S. sinensis

5b. Pharyngeal teeth in two rows, circumpeduncular scales 20............................................. S. lacustris

6a. Lateral lobes of lower lip short and thick................................................................... 7

6b. Lateral lobes of lower lip long and narrow................................................................... 8

7a. 41-42 lateral-line scales, origin of dorsal fin closer to snout tip than to caudal-fin base.................... S. kiangsiensis

7b. 38-39 lateral-line scales, origin of dorsal fin midway between tip of snout and base of caudal fin................ S. davidi

8a. Pharyngeal teeth in one row, eye dimeter in length of head 3....................................... .. S. hainanensis

8b. Pharyngeal teeth in two rows, eye dimeter in length of head more than 3,......................................... 9

9a. Lateral-line scales no more than 40, caudal peduncle somewhat short, length of caudal peduncle more than 5.0 in length of body..................................................................................... S. nigripinnis

9b. Lateral-line scales more than 40, length of caudal peduncle less than length 5.0 in length of body.......................10

10a. Head length larger than body depth, mouth subterminal................................................ S. czerskii

10b. Head length equal to body depth, mouth inferior..................................................... S. soldatovi