Temporal range: Early Jurassic
Shubin & Jenkins, 1995
Prosalirus bitis is the name given to a fossil frog found in Arizona in 1981 by Farish Jenkins, which 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. It also has long hip bones, long hind leg bones, and long ankle bones, all similar to modern frogs, and is, as of 2009 (from the book Prehistoric Life), the earliest such frog. The name comes from the Latin verb prosalire, meaning 'to leap forward'. It is thought to have lived 190 million years ago, well before the first known modern frog, the Sanyanlichan. As of 2009, only three Prosalirus skeletons have been discovered.
- Douglas Palmer et al. (2009). Prehistoric Life: The Definitive Visual History of Life on Earth (first American ed.). New York City: DK Publishing. p. 247. ISBN 9780756655730.
- Neil H. Shubin and Farish A. Jenkins, Jr (7 September 1995). "An Early Jurassic jumping frog". Nature 377 (6544): 49–52. doi:10.1038/377049a0.
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