Which of the following is not a marsupial?

The platypus is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. Together with the four species of echidna, it is one of the five extant species of monotremes, the only mammal that lay eggs instead of giving birth to live young. The animal is the sole living representative of its family ('Ornithorhynchidae') and genus ('Ornithorhynchus'), though a number of related species appear in the fossil record.

Marsupials are any members of the mammalian infraclass 'Marsupialia'. All extant marsupials are endemic to Australasia and the Americas. Well-known marsupials include kangaroos, wallabies, koalas, possums, opossums, wombats, and Tasmanian devils.

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12 Comments

Omar Mung

Oh too many platypus Q/As

Kath Thomson

Dennis Walker, no because it isn't!

Kath Thomson

Jim Mascair, the seahorse does. The pouch just has to be closed!

Jerry Edwards

Day1800 of consecutively answering questions. Anyone still with me? Queue the envious thumbs downers😂😂😂

David Stokes

I didn't know that the North American Opossum was a marsupial. The Australian Possum certainly is.

Carol Anderson

Gary Chadwick, not marsupials. Family: Ornithorhynchidae Order: Monotremata

Jim Mascair

I can't see how a platypus could carry its young in a pouch when it spends its life in water.

Robert Oldenburg

At first many people thought that the platypus was a hoax, assembled from other specimens.

Dennis Walker

A platypus is a mammal but not classified as a marsupial

Player

Gary Chadwick, The mammal class is split three ways although placentals (most mammals) and marsupials are in one subgroup (Theria) first then their own groups and monotremes in a subgroup all on their own. In other words, they are only related by being mammals.