Most species in this genus were initially classified in Bufo, but were split due to their genetic divergence and geographic separation. Some authorities still consider Anaxyrus to be a
subgenus within Bufo.[2][3] However, other authorities have disputed this classification, as doing so would also require all morphologically distinct Old World toad species to also be placed in Bufo.[1]
Tschudi JJ (1845). "Reptilium conspectus quae in Republica Peruana reperiuntur et pleraque observata vel collecta sunt in itinere". Archiv für Naturgeschichte11 (1): 150–170. (Anaxyrus, new genus, p. 170). (in Latin)
Most species in this genus were initially classified in Bufo, but were split due to their genetic divergence and geographic separation. Some authorities still consider Anaxyrus to be a
subgenus within Bufo.[2][3] However, other authorities have disputed this classification, as doing so would also require all morphologically distinct Old World toad species to also be placed in Bufo.[1]
Tschudi JJ (1845). "Reptilium conspectus quae in Republica Peruana reperiuntur et pleraque observata vel collecta sunt in itinere". Archiv für Naturgeschichte11 (1): 150–170. (Anaxyrus, new genus, p. 170). (in Latin)