Hadrianus Temporal range: 55.4–33.9 Ma Eocene[1] |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Superorder: | Chelonia |
Order: | Testudines |
Family: | Testudinidae |
Genus: | †Hadrianus Cope, 1872[1] |
Species | |
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Hadrianus is an extinct genus of tortoise belonging to the Testudinidae[1] found in the United States and Spain and believed to be the oldest true tortoise known.[2] The genus is thought to be closely related to the genus Manouria.[2] The genus may have evolved in the subtropics of Asia and subsequently migrated to North America and Europe.[2]