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nounechidnas; platypus
Similar:
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