Hadrianus (genus)

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.[3] The genus is thought to be closely related to the genus Manouria.[3] The genus may have evolved in the subtropics of Asia and subsequently migrated to North America and Europe.[3]

Hadrianus
Temporal range: 55.4–33.9 Ma Eocene[1]
Hadrianus majusculus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Clade: Polycryptodira
Superfamily: Testudinoidea
(unranked): †Pantestudinidae
Genus: †Hadrianus
Cope, 1872[2][1]
Species
  • †Hadrianus corsoni
  • †Hadrianus majusculus
  • †Hadrianus octonaria
  • †Hadrianus robustus
  • †Hadrianus schucherti
  • †Hadrianus utahensis
  • †Hadrianus vialovi

References
  1. "Fossilworks: Hadrianus". fossilworks.org. Retrieved 19 February 2019.
  2. E. D. Cope. 1872. Second account of new Vertebrata from the Bridger Eocene. Proceedings of the American Philosophical Society (separate) 1-3
  3. Ehret, Dana Joseph 2004 "Skeletochronology as a method of aging Oligocene Gopherus laticuneus and Stylemys nebrascensis, using Gopherus polyphemus as a modern analog" Thesis, University of Florida.


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