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the most primitive mammals comprising the only extant members of the subclass Prototheria
a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia
a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea
small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
primitive oviparous mammals found only in Australia and Tasmania and New Guinea
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