Fossils of
Bretesuchus have been found in the
El Brete locality, from the
Maíz Gordo Formation of northwestern
Argentina and date back to the
Thanetian stage of the late
Palaeocene, about 58.7-55.8
million years ago.
Bretesuchus was originally assigned to its own
family, the
Bretesuchidae which was found to be the sister group of
Sebecus. However, recent
phylogenetic analyses found Bretesuchidae to nest deeply within
Sebecidae, and thus to be synonymous with it.
Zulmasuchus was found to be closely related to
Sebecus, as originally had been proposed. == Etymology ==