Abstract of Smith, G.R. 1993. Cladistics and biogeography of the Catostomidae, freshwater fishes of North America and Asia. In R.L. Mayden (Ed.), Ecological Biogeography of North American freshwater fishes. Stanford Univ. Press. pp. 778- 826.

The sixty-six species of the Catostomidae are classified using all available characters. Ictiobines are the most primitive subfamily, followed by the sister pair Cycleptus (E U.S.) and Myxocyprinus (China). The Moxostomatini and Catostomini are advanced sister tribes; each consists of large bodied, large-water plesiomorphic forms and small, derived headwater forms.