| Steropodon Temporal range: Lower Cretaceous | |
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| Genus: | Steropodon |
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| Steropodon galmani | |
Steropodon galmanii was a prehistoric species of monotreme, or a egg-laying mammal, that lived during the Mesozoic, in the Lower Cretaceous period. It is the second-earliest known relative of the platypus: the earlist is called Teinolophos.
