8 Prehistoric Animals That Are NOT Dinosaurs

Andrewsarchus

Andrewsarchus was a huge Paleogene animal. It was an early hoofed artiodactyl like hippos and whales. Andrewsarchus was named after naturalist Roy Chapman Andrews, who discovered it in Mongolia.

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Basilosaurus

The name Basilosaurus suggests a reptile, although it was actually a mammal. Early Paleogene whale Basilosaurus lived in the Eocene.

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Brygmophyseter

Early Miocene sperm whale Brygmophyseter. Its name means ‘biting sperm whale’ since it was an apex predator with 14 cm (5.5 in.) fangs. Brygmophyseter reached 7 m (23 ft.).

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Castoroides

North American Pleistocene gigantic beaver Castoroides was 2.5 m (8 ft.). The largest beaver ever lived, but it had a modest brain for its body size and may not have been as sophisticated as its modern equivalent.

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Coelodonta

Woolly rhinoceros is Coelodonta. This big beast had thick fur and two large horns on its nose. Multiple species were found in Europe, Africa, and Asia. Coelodonta lived during the last ice age.

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Entelodon

Hoofed Paleogene mammal Entelodon. Previously assumed to be a prehistoric pig, it is now linked to whales and hippos. It inhabited in North America, Europe, and Asia from mid-Paleocene to early Neogene.

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Glyptodon

Glyptodon was a Pliocene and Pleistocene huge armadillo. Its 1.5 m (5 ft.) shell and 3.3 m (11 ft.) body probably made it stand out in South American woods and grasslands.

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Hyaenodon

Hyaenodon were big carnivorous mammals from the Eocene to the mid Miocene. The largest Hyaenodons were predators of their day. With a long head and robust, doglike physique, most creatures would have been less dangerous.

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