List of monotremes and marsupials

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