The following fossil taxa are also known, all of which were also previously placed in
Bufo: • †
Anaxyrus defensor (Meylan, 2005) (Pliocene/early Pleistocene of
Florida) • †
Anaxyrus hibbardi (Taylor, 1937) (Late Miocene of
Kansas) • †
Anaxyrus pliocompactilis (Wilson, 1968) (Late Miocene of Kansas, possibly synonymous with
Anaxyrus compactilis or
Anaxyrus speciosus) • †
Anaxyrus repentinus (Tihen, 1962) (Mid-Late Pleistocene (
Rancholabrean) of Kansas, possibly synonymous with
Anaxyrus woodhousii or
Anaxyrus cognatus) • †
Anaxyrus rexroadensis (Tihen, 1962) (Pliocene/early Pleistocene of Kansas) • †
Anaxyrus spongifrons (Tihen, 1962) (Late Miocene of Kansas) • †
Anaxyrus suspectus (Tihen, 1962) (Pliocene/early Pleistocene (
Blancan) of Kansas) • †
Anaxyrus tiheni (
Auffenberg, 1957) (Late Miocene of Florida) • †
Anaxyrus valentinensis (
Estes & Tihen, 1964) (Middle Miocene (
Barstovian) of
Nebraska) ==References==