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Prochelydella buitreraensis
Prochelidella buitreraensis was a species of fossil turtle assigned to the Chelidae family, a group of freshwater turtles, which lived in the Cenomanian during the Upper Cretaceous, approximately 100 million years ago. Its specific epithet, namely "buitreraensis", is due to the paleonthologic site La Buitrera, where it was found.

Characteristics of the remains found
The remains are notably for their exceptional state of preservation, which includes the presence of the skull. Besides, the remains of cervical vertebrae, the shell and the appendicular skeleton have also been found. The remains were found in Cañadón de las Tortugas, at La Buitrera, Río Negro ProvinceRío Negro Province, Argentine Patagonia, by scientists from CONICET. The estimated age of the finding, from the Cenomanian age, was calculated with radiometric dating carried out on zircons on a volcanic tuff. The remains of Prochelydella buitreraensis are hosted at Carlos Ameghino Provincial Museum in the city of Cipolletti, Río Negro Province, Argentina.

Habitat
The anatomical features of Prochelydella buitreraensis are similar to those of modern freshwater turtles living in rivers and lakes. Additionally, the rocks from which the fossils were extracted correspond to environments found in rivers. All of this suggests that this species lived in evironment with such features, possibly a river.

Anatomy
The remains found match those of the turtle genus Prochelydella. The distinctive anatomical features of this species, known as diagnoses, are found on the skull and are a large retropterygoid foramen and a well-developed muscular insertion zone on the basisphenoids bone.