Family Ornithorhynchidae Gray 1825 (platypus)
PaleoDB taxon number: 39738
Parent taxon: Monotremata according to T. Rowe et al. 2008
Sister taxa: Agathodonta, Cacodonta, Kollikodontidae, Kryoryctes, Platypoda, Spondilocoelia, Steropodontidae, Tachyglossa, Tachyglossidae
Subtaxa: Monotrematum, Obdurodon, Ornithorhynchus, Steropodon, Teinolophos
Ecology: scansorial insectivore-herbivore