Mammalia - Monotremata - Ornithorhynchidae

Full reference: M. Archer, T. F. Flannery, A. Ritchie and R. E. Molnar. 1985. First Mesozoic mammal from Australia-- an early Cretaceous monotreme. Nature 318:363-366

Parent taxon: Ornithorhynchidae according to T. Rowe et al. 2008

Sister taxa: Monotrematum, Obdurodon, Ornithorhynchus, Teinolophos

Subtaxa: Steropodon galmani

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Type: Steropodon galmani

Ecology: scansorial insectivore-herbivore