prototherian

Types:

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egg-laying mammal, monotreme

the most primitive mammals comprising the only extant members of the subclass Prototheria

anteater, echidna, spiny anteater

a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia

anteater, echidna, spiny anteater

a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea

Ornithorhynchus anatinus, duck-billed platypus, duckbill, duckbilled platypus, platypus

small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae

Type of:

mammal, mammalian

any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk