Genus: Priosphenodon APESTEGUIA & NOVAS, 2003
Etymology:

Species: avelasi APESTEGUIA & NOVAS, 2003
Etymology:

Holotype: MPCA 300

Locality: ‘La Buitrera’ fossil quarry, Cerro Policia, Rio Negro Province, Northwest Patagonia, Argentina.

Horizon: Upper layers Candeleros Formation, Lower Rio Limay Subgroup, Lower Neuquen Group.

Biostratigraphy:

Age: Limayan Tetrapoda Assemblage, Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch, Late Early or Middle Cretaceous-Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Early Late Cretaceous.

Material: Skull, dentary and a partially articulated skeleton of an adult.

Referred material:

MPCA 301: Incomplete skeleton of a juvenile.

MPCA 302: Postcranial isolated remains.

MPCA 303: A partially articulated adult skeleton.

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Species: minimus APESTEGUIA & CABALLIDO, 2015
Etymology: Latin, minimus, "small"; In reference to the small size of this species when compared with any other eilenodontine, especially in comparison with Priosphenodon avelasi.

Holotype: MPEF-PV 3166

Locality: Tres Cerros locality, about 70 km northeast from Los Altares, Cubut Province, central Patagonia, Argentina.

Horizon: Upper part of the La Paloma Member, upper layers of the Candeleros Formation.

Biostratigraphy:

Age: Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch, Late Early or Middle Cretaceous.

Material: An almost complete skull and attached jaws.

Referred material:

Locality: Huaniman Locality, 11 km northwest of the type locality, Cubut Province, central Patagonia, Argentina.

Horizon: Upper part of the La Paloma Member, upper layers of the Candeleros Formation.

Biostratigraphy:

Age: Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch, Late Early or Middle Cretaceous.

Material:

MPEF-PV 3092: 12 partial bones, including partial jaws, maxillae and palatines.