Alligator olseni (common name Olsen's Alligator, named after Russel Olsen) is an extinct species of alligator. They lived in the Early Miocene period, around 20.4–15.97 million years ago and possibly earlier. Their range was principally in what is now known as Florida, United States, and possibly extending into southeastern Texas.
Temporal range: Early Miocene
|Forelimbs of Alligator olseni|
- Rio, Jonathan P.; Mannion, Philip D. (6 September 2021). "Phylogenetic analysis of a new morphological dataset elucidates the evolutionary history of Crocodylia and resolves the long-standing gharial problem". PeerJ. 9: e12094. doi:10.7717/peerj.12094.
- T. E. White. 1942. A new alligator from the Miocene of Florida. Copeia 1942(1):3-7
- "Alligator olseni". Florida Museum of Natural History. Retrieved 18 June 2016.
- "Alligator olseni". Fossilworks. Retrieved 17 December 2021.