The oldest and first nearly complete skeleton of a chelid, of the Hydromedusa sub-group (Chelidae, Pleurodira), from the Upper Cretaceous of Patagonia
M. de la Fuente,
F. de Lapparent de Broin, and
T. M. de Bianco
2001
Article
Bulletin de la Société Géologique de France
172(2):237-244
Find it at: