List of monotremes and marsupials


The class Mammalia is divided into two subclasses based on reproductive techniques: egg-laying mammals, and mammals which give live birth. The latter subclass is divided into two infraclasses: pouched mammals, and placental mammals. Classification updated from Wilson and Reeder's "Mammal Species of the World: A Taxonomic and Geographic Reference" using the "Planet Mammifères" website.

Subclass Prototheria">Monotreme">Prototheria (the monotremes)

Order [Monotremata] (monotremes, egg-laying mammals)

Infraclass Metatheria">Marsupial">Metatheria (marsupials)

Order [Didelphimorphia] (American [opossum]s)

Suborder [Vombatiformes] (wombats and koalas)