The strata from which remains of Menatalligator have been found are part of the Chaîne des Puys, a volcanically active chain of mountains in the Massif Central. The deposit is thought to have formed through the deposition of sediments in a body of water that filled a volcanic crater during the early Eocene (Ypresian). Fossil fish such as Amia valenciennense and Thaumaturus have been found from the same strata as Menatalligator, and most likely comprised a portion of its diet. The presence of the early primate-like plesiadapiformPlesiadapis insignis from these strata also make the area important to the study of early mammalian evolution after the Cretaceous–Paleogene boundary (K–T boundary).[2]
^Alain Tourreau (2002). "Les temps géologiques vus de l'Auvergne". De la Chaîne des Puys au Volcan de Jaude Volume 2 of Terres vivantes d'Auvergne. Editions Creer. pp. 7–31.