![The speciation of alligators. The extinct species are Alligator prenasalis, Alligator mcgrewi, Alligator mefferdi, Alligator thomsoni, and Alligator lucius. This chart is somewhat outdated on the absence of the recently described and The speciation of alligators. The extinct species are Alligator prenasalis, Alligator mcgrewi, Alligator mefferdi, Alligator thomsoni, and Alligator lucius. This chart is somewhat outdated on the absence of the recently described and](https://preview.redd.it/xrvbirgg15a81.jpg?auto=webp&s=399426c1595ed3f8e3874cdb29426983c1012d48)
The speciation of alligators. The extinct species are Alligator prenasalis, Alligator mcgrewi, Alligator mefferdi, Alligator thomsoni, and Alligator lucius. This chart is somewhat outdated on the absence of the recently described and
![51 Million Year Old Fossilized Crocodile -- Green River Formation, Fossil Butte Member, Wyoming (Eocene Period) Alliga… | Dinosaur fossils, Fossils, Fossil bones 51 Million Year Old Fossilized Crocodile -- Green River Formation, Fossil Butte Member, Wyoming (Eocene Period) Alliga… | Dinosaur fossils, Fossils, Fossil bones](https://i.pinimg.com/736x/9d/d4/23/9dd423028ba0dfb4bb972f3b721120e5.jpg)
51 Million Year Old Fossilized Crocodile -- Green River Formation, Fossil Butte Member, Wyoming (Eocene Period) Alliga… | Dinosaur fossils, Fossils, Fossil bones
![Alex Hastings on X: "Happy #FossilFriday AND #WorldCrocDay! I'm on the road this week for @NSScaves, so to celebrate, here's #Alligator prenasalis, the first #gator! This is at Badlands National Park, SD, Alex Hastings on X: "Happy #FossilFriday AND #WorldCrocDay! I'm on the road this week for @NSScaves, so to celebrate, here's #Alligator prenasalis, the first #gator! This is at Badlands National Park, SD,](https://pbs.twimg.com/media/FVea_OjXwAIqZIK.jpg)