Considered a synonym of Ictiobus niger (Rafinesque, 1819)
- Gilbert, Carter R.. 1998. "Type catalog of Recent and fossil North American Freshwater fishes: families Cyprinidae, Catostomidae, Ictaluridae, Centrarchidae and Elassomatidae". Florida Museum of Natural History, Special Publication No. 1. 1-284 (ffm00083)
Original description as Bubalichthys bonasus:
- Agassiz, Louis. 1855. "Art. XII.--Synopsis of the ichthyological fauna of the Pacific slope of North America, chiefly from the collections made by the U. S. Expl. Exped. under the command of Capt. C. Wilkes, with recent additions and comparisons with eastern types". American Journal of Science and Arts. 19(56):215-231 (ffm00096)