Alligator olseni

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.[2] Their range was principally in what is now known as Florida, United States, and possibly extending into southeastern Texas.[3][4]

Olsen's alligator
Temporal range: Early Miocene 20.4–16 Ma[1]
Alligator olseni.jpg
Forelimbs of Alligator olseni
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Crocodilia
Family: Alligatoridae
Subfamily: Alligatorinae
Genus: Alligator
A. olseni
Binomial name
Alligator olseni
White, 1942


  1. ^ 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.
  2. ^ T. E. White. 1942. A new alligator from the Miocene of Florida. Copeia 1942(1):3-7
  3. ^ "Alligator olseni". Florida Museum of Natural History. Retrieved 18 June 2016.
  4. ^ "Alligator olseni". Fossilworks. Retrieved 17 December 2021.