Original description as Catostomus plebeius:
- Baird, Spencer F. & C.F. Girard. 1854. "Descriptions of new species of fishes collected in Texas, New Mexico and Sonora, by Mr. John H. Clark, on the U. S. and Mexican Boundary Survey, and in Texas by Capt. Stewart Van Vliet, U. S. A". Proceedings of the Academy of Natural Sciences of Philadelphia. (7):24-29 (ffm00256)
- Catostomus (Acomus) generosus Girard, 1856, with type locality at Utah Creek, upper Rio Grande basin, Costilla County, Colorado, U.S.A. Determiner: Smith, 1966
- Catostomus (Acomus) guzmaniensis Girard, 1856, with type locality at Río Janos, tributary to Lago de Guzman, Chihuahua, Mexico. Determiner: Gilbert, 1998
Conservation: Catostomus plebeius is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (DD) data deficient (2018).