Prototheria
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Related to Prototheria: Metatheria
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Noun | 1. | Prototheria - echidnas; platypus class Mammalia, Mammalia - warm-blooded vertebrates characterized by mammary glands in the female Monotremata, order Monotremata - coextensive with the subclass Prototheria class - (biology) a taxonomic group containing one or more orders |
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