Anaxyrus is a subgenus of true toads, genus Bufo, native to North and Central America. Although some authors have recognized Anaxyrus as a separate genus, this action has not been widely accepted.
Species
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Pauly, G. B., D. M. Hillis, and D. C. Cannatella. (2004) The history of a Nearctic colonization: Molecular phylogenetics and biogeography of the Nearctic toads (Bufo). Evolution58: 2517–2535.