Genus: Inawentu FILIPPI, VALIERI, GALLINA, MENDEZ, GIANECHINI & GARRICO, 2024
Etymology: Mapundung, inawentu, "imitator or mimic."

Species: oslatus FILIPPI, VALIERI, GALLINA, MENDEZ, GIANECHINI & GARRICO, 2024
Etymology: Latin, os, "mouth" and Latin, latus, "broad."

Holotype: MAU-Pv-LI-595

Locality: La Invernada, southwest of Rincon de los Sauces city Neuquen Province, Patagonia, Argentina.

Horizon: Bajo de la Carpa Formation, Rio Calorado Subgroup, Neuquen Group.

Biostratigraphy:

Age: Santonian Stage, Early Senonian Subepoch, Early Gulf Epoch, Early Late Cretaceous.

Material: Almost complte skull, axial sequence from atlas to teh last sacral element and both ilia.