Considered a synonym of Gila robusta Baird & Girard, 1853
- 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 Gila affinis:
- Abbott, Charles Conrad. 1853. "Description of four new species of North American Cyprinidae". Proceedings of the Academy of Natural Sciences of Philadelphia. 6:368-369 (ffm00132)