Genus: Rionegrochelys de la FUENTE, MANIEL, & JANNELLO, 2017
Etymology: In reference to Rio Negro Province, Argentina, and Greek, chelys, "aquatic turtle."
Species: caldiero de la FUENTE, MANIEL, & JANNELLO, 2017
Etymology:
In honor of the late Ing. Victorino Caldiero (1945-1999), for his contribution to the project of developing the southern margin of Cipolletti, Rio Negro Province, Argentina.
Holotype: MPCA-AT 258
Locality: Northern flank of the Parrita site, El Anfiteatro, Rio Negro Province, Patagonia, Argentina.
Horizon: Plottier Formation.
Biostratigraphy:
Age: Coniacian-Santonian Stage, Early Senonian Subepoch, Gulf Epoch, Early Late Cretaceous.
Material: Carapace and plasteron of an adult.
Referred material:
MPC-AT 26: Isolated plates of a carpace.
MPCA-AT 29: Right hypoplastral bone.
MPCA-AT 30: Right lateral edge of carapace with plastral bridge suture.