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...

(metatherians or marsupials), and placental mammals (eutherians, for which see List of placental mammals). Classification updated from Wilson and Reeder's "Mammal...

of Australia List of monotremes and marsupials of Australia List of placental mammals introduced to Australia List of rodents of Australia List of mammals...

than bearing live young. The extant monotreme species are the platypus and the four species of echidnas. Monotremes are typified by structural differences...

List of monotremes and marsupials of Australia List of bats of Australia List of placental mammals introduced to Australia List of marine mammals of Australia...

of Australia have a rich fossil history, as well as a variety of extant mammalian species, dominated by the marsupials, but also including monotremes...

Australia List of mammals of Australia List of monotremes and marsupials of Australia List of bats of Australia List of rodents of Australia List of marine...

Australia portal Animals portal List of mammals of Australia List of Australian monotremes and marsupials List of Australian bats List of Australian rodents...

in most modern marsupials (though a small number of exceptions are reported) and epipubic bones are present. Marsupials (and monotremes) also lack a gross...

placental mammals and marsupials may have diverged earlier, and a subsequent branching divided the monotremes and marsupials, but later research and fossil discoveries...