Prosalirus is the name given to a fossilised prehistoric frog found in the Kayenta Formation of Arizona in 1981 by Farish Jenkins and distinguished by its hind legs for jumping [2] The type, and currently only, species is Prosalirus bitis.

[3] The skeleton has primitive features, but has mostly lost the salamander-like traits of its ancestors.

It has a skeleton designed to absorb the force of jumping with its hind legs and tail.

[1] The name comes from the Latin verb prosalire, meaning 'to leap forward'.

It is thought to have lived during the Early Jurassic epoch 190 million years ago, well before the first known modern frog, Callobatrachus.