It contains the single species Corriebaatar marywaltersae and represents the first evidence of Australian multituberculates.

[1] It is known from fossils found in the Wonthaggi Formation date back to the Early Cretaceous (latest Barremian ~ 125 million years ago).

The species Corriebaatar marywaltersae was discovered in 2009 based on the discovery of a well-preserved fourth premolar found in Victoria, Australia at the Flat Rocks fossil site.

It was hypothesized to represent a cimolodontan multituberculate mammal as opposed to a new, unrecognized lineage.

Corriebaatar was placed in the 2022 study as a derived multituberculate belonging to Cimolodonta, and possibly closely related to Ferugliotherium from the Late Cretaceous of Argentina.