| Named By: | Edward Drinker Cope in 1867 |
| Time Period: | Unavailable |
| Location: | Angola. Argentina - Jaguel Formation, Roca Formation. Chile - Quiriquina Formation. Morocco. USA, California - Moreno Formation, Maryland - Aquia Formation |
| Size: | Unavailable |
| Diet: | Durophagous (eater of shelled organisms) |
| Fossil(s): | Several individuals, usually of skull remains |
| Classification: | | Chordata | Reptilia | Testudines | Cryptodira | Chelonioidea | |
| Also known as: | | Glossochelys | Pampaemys meriodionalis | |
Euclastes is an extinct genus of sea turtle. It was first named by Edward Drinker Cope in 1867, and contains three species. E. hutchisoni, was named in 2003 but has since been reassigned to the genus Pacifichelys, while 'E. coahuilaensis' named in 2009 was reassigned as Mexichelys coahuilaensis in 2010