†Hadrianus Cope 1872 (tortoise)
Reptilia - Testudines - Testudinidae
Alternative spellings: Geochelone (Hadrianus), Testudo (Hadrianus)
Parent taxon: Testudinidae according to D. M. Bramble 1982
Sister taxa: Bellia, Cachuga, Damonia, Dipsochelys, Floridemys, Geochelone, Gigantochersina, Hesperotestudo, Homopus, Impregnochelys, Indotestudo, Kansuchelys, Kinixys, Miotestudo, Nicoria, Psammobates, Sinohadrianus, Stylemys, Testudininae, Testudo
Subtaxa: Hadrianus robustus, Hadrianus utahensis, Testudo (Hadrianus) corsoni
Ecology: amphibious herbivore