Cenozoic

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Paleocene

​A gondwanathere that is found in the Australian Murgon deposits. Sudamericidae.
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A stem-litoptern that is found in the Australian Murgon deposits, having come from South America via Antarctica. Stem Litopterna.

A relictual tritylodont therapsid, which survived through the end of the Cretaceous, evolving a specialized diet during the “fern spike”. Feeds entirely on ferns, much like a panda does on bamboo. Tritylodontidae.
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Late-surviving enantiornithine. Enantiornithes.
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Eocene

A very primitive whippo that is terrestrial and more primitive than Indohyus. Stem Whippomorpha.
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A “condylarth” which has evolved a specialized, tree-sloth-like lifestyle. “Condylarthra”.
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A durophagous relative of Dorudon which feeds mainly on shellfish that it plucks from the sea floor. Dorudontinae.
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Oligocene

A relative of Brontornis which is an eater of coarse plants, and has shortened, robust legs and feet. Brontornithidae.
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An ancestral moa which still possesses visible wings. Dinornithiformes.
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A primitive ostrich which has large claws on its wingtips for defence. Struthioniformes
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Miocene

A relictual, opossum-like marsupial that inhabits the harsh tundra and scrub of Antarctica, before the ice-caps have fully covered the continent. Australidelphia.
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A desmostylian with large, walrus-like tusks used in fighting and sexual display. Desmostylia.
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Nimravid with clear adaptations towards a cheetah-like lifestyle. Nimravidae.

A relative of Dromornis which has a large, casque-like culmen at the top of its beak. Dromornithidae.
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Pleistocene

A large, ape-like New-World monkey which has only a vestigial tail, and is quite adept on the ground, as well as in the trees. Atelidae.
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A long-legged hawk that is mostly flightless, and relies on chasing prey over the ground on its very long legs. Accipitridae.