Neusticemys is an extinct genus of thalassochelydian sea turtle.

Its type species is Eurysternum neuquinum.

It is known from the Late Jurassic (Tithonian) aged Vaca Muerta of Patagonia, Argentina Neusticemys was originally described as a new species of Eurysternum, but was later assigned to its own genus in 1993.

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