Cretaceous mammals of Australia

Kollikodon is an extinct species of mammal, considered to be an early monotreme. It is known only from an opalised dentary fragment, with one premolar and two molars in situ, as well as a referred maxillary fragment containing the last premolar and all four molars. The fossils were found in the Griman Creek Formation at Lightning Ridge, New South Wales, Australia. Kollikodon lived in the Late Cretaceous period, during the Cenomanian age (99–96 million years ago). Several other monotremes are known from the Griman Creek Formation, including Dharragarra, Opalios, Parvopalus, Steropodon, and Stir

Steropodon is a genus of prehistoric platypus-like monotreme, or egg-laying mammal. It contains a single species, Steropodon galmani, that lived about 100.2–96.6 million years ago during the Cretaceous period, from early to middle Cenomanian. It is one of the oldest monotremes discovered, and is one of the oldest Australian mammal discoveries. Several other monotremes are known from the Griman Creek Formation, including Dharragarra, Kollikodon, Opalios, Parvopalus, and Stirtodon.

Teinolophos, from Ancient Greek τείνω (teínō), meaning "extend", and λόφος (lóphos), meaning "crest", is a genus of teinolophid monotreme that lived during the late Barremian age of the Early Cretaceous. It is known from four specimens, each consisting of a partial lower jawbone collected from the Wonthaggi Formation at Flat Rocks, Victoria, Australia.

Kryoryctes is a genus of prehistoric monotreme mammal from the Early Cretaceous (Albian) Eumeralla Formation of Victoria, Australia from the Otway Group of Dinosaur Cove. It is known only from a partial right humerus, estimated at 106 million years old, and contains one species, Kryoryctes cadburyi. The holotype, NMV P208094, was described in 2005 and is currently housed in the Museums Victoria Palaeontological Collection.

Ausktribosphenidae is an extinct family of australosphenidan mammals from the Early Cretaceous of Australia and mid Cretaceous of South America.

Corriebaatar is an extinct genus of multituberculate mammals. It contains the single species Corriebaatar marywaltersae and represents the first evidence of Australian multituberculates. It is known from fossils found in the Wonthaggi Formation date back to the Early Cretaceous (latest Barremian ~ 125 million years ago).

Ausktribosphenos is an extinct genus of mammals from the Early Cretaceous of Australia, sometime between 121 - 113 Ma during the Aptian. The only recorded species, Ausktribosphenos nyktos, was found on Flat Rocks in the Wonthaggi Formation, Victoria.