Mammalia - Monotremata - Ornithorhynchidae

Alternative spelling: Ornithorhyncus

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

Sister taxa: Monotrematum, Obdurodon, Steropodon, Teinolophos

Subtaxa: Ornithorhynchus anatinus

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Ecology: amphibious insectivore-herbivore