Mammals are divided into two subclasses based on reproductive techniques: egg laying mammals (the monotremes), and live birth mammals. The second subclass is divided into two infraclasses: pouched mammals (the marsupials) and placental mammals. Australia is home to two of the five extant species of monotremes and the majority of the world's marsupials (the remainder are from Papua New Guinea, eastern Indonesia and the Americas). The taxonomy is somewhat fluid; this list generally follows Menkhorst and Knight and Van Dyck and Strahan, with some input from the global list, which is derived from Gardner and Groves. This is a sub-list of the list of mammals of Australia. Conservation status listed follows the IUCN Red List of Threatened Species (v. 2013.2; data current at 5 March 2014 ):

• extinct
• extinct in the wild
• critically endangered
• endangered
• vulnerable
• near threatened
• least concern
• data deficient
• not evaluated

Monotremata (monotremes)

Ornithorhynchidae

Tachyglossidae

Marsupialia (marsupials)

Dasyuromorphia (marsupial carnivores)

Thylacinidae

Dasyuridae

Myrmecobiidae

Peramelemorphia (bandicoots, bilbies)

Chaeropodidae

Peroryctidae

Peramelidae

Thylacomyidae

Notoryctemorphia (marsupial moles)

Notoryctidae

Diprotodontia

Vombatiformes (wombats, koalas)

Vombatidae

Phascolarctidae

Phalangeriformes (possums, gliders)

Phalangeridae

Burramyidae

Tarsipedidae

Petauridae

Pseudocheiridae

Acrobatidae

Macropodiformes (kangaroos, wallabies)

Hypsiprymnodontidae

Potoroidae

Macropodidae