Douglas J. Futuyma, Mark Kirkpatrick
Abstract
A mammal that lays eggs. Monotreme mammals—spiny anteaters and this Australian platypus (Ornithorhynchus anatinus)—are one of the two oldest branches of the phylogeny of mammals. Monotremes lay eggs, while all other mammals have live birth.
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A mammal that lays eggs. Monotreme mammals—spiny anteaters and this Australian platypus (Ornithorhynchus anatinus)—are one of the two oldest branches of the phylogeny of mammals. Monotremes lay eggs, while all other mammals have live birth.
Key concepts: Platypus, Monotreme, Mammal, Biology, Zoology, Tree of life (biology), Theria, Evolutionary biology