Hadrianus (genus)

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Temporal range: 55.4–33.9 Ma
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Family: Testudinidae
Genus: Hadrianus
Cope, 1872[1]
  • Hadrianus corsoni (syn. H. octonarius)
  • Hadrianus robustus
  • Hadrianus schucherti
  • Hadrianus utahensis

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]


  1. ^ a b c http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=58498&is_real_user=1
  2. ^ a b c 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.