Question

prototheria includes​

Answer 1

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Answer 2

Classification of Living Things: Mammal Subclasses and Infraclasses This is similar to birds and reptiles. The Prototheria are also similar to reptiles in some aspects of their skeletons. ... There are only three surviving rare species groups of Prototheria. These are the Australian platypus and 2 echidna (spiny anteater) species of Australia and New Guinea.

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