Synonyma
Extrarius Jordan, 1919 ― Hybopsis tetranemus Gilbert, 1886
Jordan, D. S. 1919. New genera of fishes. Proceedings of the Academy of Natural Sciences of Philadelphia v. 70 (for 1918): 341-344.
Typový druh
Gobio gelidus Girard, 1856.
Původní popis
Cockerell, T. D. A. & Allison, E. M. 1909. The scales of some American Cyprinidae. Proceedings of the Biological Society of Washington v. 22: 157-163, Pl. 3.
Použitá literatura
Fricke, R., Eschmeyer, W. N. & Van der Laan, R. (eds). 2024. Eschmeyer's catalog of fishes: Genera, species, references. World Wide Web.