Gastromyzon ridens group

H. H. Tan & C. U. M. Leh, 2006, Three new species of Gastromyzon (Teleostei: Balitoridae) from southern Sarawak., Zootaxa 1126, pp. 1-19 : 9

Gastromyzon ridens group

Diagnosis.-This species group is defined by a truncate head when viewed dorsally (except for G. ridens , which has a rounded head); sublacrymal groove distinctively visible on lateral part of snout; anterior area of snout with slight depression and densely covered with tubercles; a vertical gill slit; absence of a subopercular groove; absence of a secondary rostrum; absence of a postoral pouch; and absence of scales on abdomen.