Atlantochelys
| Atlantochelys Temporal range: Late Cretaceous,  | |
|---|---|
| Fossil humerus | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Chordata | 
| Class: | Reptilia | 
| Order: | Testudines | 
| Suborder: | Cryptodira | 
| Family: | †Protostegidae | 
| Genus: | †Atlantochelys Leidy, 1865 | 
| Species: | †A. mortoni | 
| Binomial name | |
| †Atlantochelys mortoni Leidy, 1865 | |
Atlantochelys is an extinct genus of sea turtle from the Upper Cretaceous of New Jersey. For 163 years, only a partial humerus was known, but the second part of the same bone was found in 2012. The full size has been extrapolated as being 3 m (9.8 ft).