Steropodon was monotreme, or egg-laying mammal, that lived during the Early Cretaceous period. Steropodon is one of the earliest known relative of the Platypus. Steropodon was a large mammal for the Mesozoic, being 40–50 cm long.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.