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Definitions of prototheria
  1. noun
    echidnas; platypus
    type of:
Definition that contains prototheria
  • monotremata coextensive with the subclass Prototheria
  • monotreme the most primitive mammals comprising the only extant members of the subclass Prototheria
  • egg-laying mammal the most primitive mammals comprising the only extant members of the subclass Prototheria
  • order monotremata coextensive with the subclass Prototheria
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