Alligator olseni

 ( 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.T. E. White. 1942. A new alligator from the Miocene of Florida. Copeia 1942(1):3-7 Their range was principally in what is now known as Florida, United States, and possibly extending into southeastern Texas. It is a small alligator with an estimated body length of .

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Classification Alligator olseni is a member of the subfamily Alligatorinae, within the larger family Alligatoridae. It is closely related to the living American alligator and Chinese alligator, as shown in the cladogram below:

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