Mesozoic mammals of Madagascar - Video Learning - WizScience.com
Animales del mundo -El Ornitorrinco-
The Australosphenida are a proposed infraclass of mammals within subclass Yinotheria. Today, there are only five surviving species, which live in Australia and New Guinea, but fossils have been found in Madagascar and Argentina. The surviving species consist of the platypus and four species of echidna.
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