Mammaliaformes Rowe 1988, nom. cl. inval.
see Clade Mammaliaformes Rowe 1988 [Rowe 2020]
[crown] Class Mammalia Linnaeus, 1758 - mammals
Subclass Prototheria Gill, 1872 - monotremes
Order Platypoda Gill, 1872 - platypuses
see Order Monotremata Bonaparte, 1837
Family Ornithorhynchidae Gray, 1825 - platypuses
Genus †Monotrematum Pascual, Archer, Ortiz Jaureguizar, Prado, Godthelp & Hand, 1992