Genus: Trapalochelys STERLI, de la FUENTE & CERDA, 2013
Etymology: In reference to the type localty, Trapalco, Rio Negro Province, Argentina and Greek, chelys, "turtle."

Species: sulcata STERLI, de la FUENTE & CERDA, 2013
Etymology: Latin, sulcata, "to make a furrow," in reference to the strong sulci present on the surface of the carpace.

Holotype: MLP 86-IV-5-2

Locality: 4.6 km east of "Salinas de Trapal-Co," Rio Negro Province, Argentina.

Horizon: Allen Formation.

Biostratigraphy:

Age: Late Campanian-Early Maastrichtian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material: Fragment of neural bone, left peripherals 1, 2, 6 to 9, right peripherals 2, 3, 6 to 9, right costal 4 and several costal fragments, neurals ?3 and ?5 with a fragment of the neural anterior to it, several indeterminate carapace fagments, a fragment of the left hypoplastron, several indeterminate plastral fragments thoracic vertebra 9, two neural archs of caudal vertebrate and a right opisthotic.

Referred material:

MLP 52-IX-38-53: Neural.

MLP 88-III-31-97: 6th caudal vertebra.

MLP 88-III-31-98: 3rd caudal vertebra.

MLP 88-31-99: 5th caudal vertebra.

MLP 88-III-31-100: 4th caudal vertebra.

MLP 88-III-31-101: 7th caudal vertebra.