†Stylemys Leidy 1851 (tortoise)
Reptilia - Testudines - Testudinidae
Parent taxon: Testudinidae according to W. P. Wall and D. Maddox 1998
Sister taxa: Bellia, Cachuga, Damonia, Dipsochelys, Floridemys, Geochelone, Gigantochersina, Hadrianus, Hesperotestudo, Homopus, Impregnochelys, Indotestudo, Kansuchelys, Kinixys, Miotestudo, Nicoria, Psammobates, Sinohadrianus, Testudininae, Testudo
Subtaxa: Stylemys botti, Stylemys calaverensis, Stylemys canetotiana, Stylemys capax, Stylemys conspecta, Stylemys copei, Stylemys emiliae, Stylemys frizaciana, Stylemys karakolensis, Stylemys nebrascensis, Stylemys neglectus, Stylemys oregonensis, Stylemys pygmea, Stylemys uintensis, Stylemys undabuna
Ecology: ground dwelling herbivore-herbivore