Australosphenida (includes Monotremes: Echidnas and Platypuses)

This infraclass includes a number of extinct orders, as well as the sole recent order Monotremata (i.e. echidnas and the platypus).


Order: Monotremata

Superfamily: Ornithorhynchoidea1

Family: Ornithorhynchidae (platypuses)

—No subordinate taxa


Family: Tachyglossidae (echidnas)

Scientific Name Author/s Common Name Last Record Distribution Status Taxon Profile
Megalibgwilia owenii Krefft, 1868 Owen's echidna Late Pleistocene Australia Extinct Access
Megalibgwilia ramsayi Owen, 1884 Ramsay's echidna c.48,000 BC New South Wales & Tasmania, Australia Invalid (synonym) Access
Murrayglossus hacketti (Glauert, 1914) Hackett's giant echidna c. 38,000 BC? Western Australia, Australia Extinct Access
Zaglossus attenboroughi Flannery & Groves, 1998 Attenborough's echidna, Cyclops long-beaked echidna, Sir David's long-beaked echidna (rediscovered) Cyclops Mountains, New Guinea Rediscovered Access


1 Flannery, Timothy F., McCurry, Matthew R., Rich, Thomas H., Vickers-Rich, Patricia, Smith, Elizabeth T. and Helgen, Kristofer M. (2024). A diverse assemblage of monotremes (Monotremata) from the Cenomanian Lightning Ridge fauna of New South Wales, Australia. Alcheringa: An Australasian Journal of Palaeontology.


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