Original description as Catostomus clarkii:
- 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)
- Pantosteus arizonae Gilbert, 1856, with type locality at Select the database to search: GENERA SPECIES REFERENCES Comments: William Eschmeyer Species that contain: Catostomus and clarkii [ 4 ] records arizonae, Pantosteus Gilbert [C. H.] in Jordan & Evermann 1896:170 [Bulletin of the United States. Determiner: Smith, 1966
- Notolepidomyzon utahensis Tanner, 1932, with type locality at Santa Clara Creek, at Veyo, Washington County, Utah, U.S.A. Determiner: Smith, 1966
Conservation: Catostomus clarkii is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (LC) least concern (2018).