This article may be expanded with text translated from the corresponding article in French. (April 2016) Click [show] for important translation instructions. View a machine-translated version of the French article. Machine translation like DeepL or Google Translate is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 4,378 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing French Wikipedia article at [[:fr:Atlantochelys]]; see its history for attribution. You should also add the template ((Translated|fr|Atlantochelys)) to the talk page. For more guidance, see Wikipedia:Translation.

Temporal range: Late Cretaceous, 83 Ma
First discovered part of the only known bone
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Family: Protostegidae
Genus: Atlantochelys
Agassiz, 1849
Type species
Atlantochelys mortoni
(Agassiz, 1849)

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.[1][2][3] The full size has been extrapolated as being 3 m (9.8 ft).[4]


  1. ^ Parris, D., Schein, J., Daeschler, E., Gilmore, E., Poole, J., Pellegrini, R. Two halves make a holotype: two hundred years between discoveries. Proceedings of the Academy of Natural Sciences of Philadelphia. 163. ISSN 0097-3157.
  2. ^ "Paleontologists assemble giant turtle bone from fossil discoveries made centuries apart".
  3. ^ "Monster turtle fossils re-united". BBC News. 25 March 2014.
  4. ^ Parry, Wynne (March 25, 2014). "Missing Half of Bone Reveals Prehistoric Sea Giant". LiveScience. Retrieved December 23, 2018.