Dictionary > Prototheria

Prototheria

Definition
noun
A taxonomic group comprised of egg-laying mammals monotremes and related extinct species
Supplement
Class Mammalia includes the Theria and the Prototheria. Theria includes mammals in which the young are born alive whereas Prototheria includes mammals laying eggs, i.e. the monotremes
Word origin: Greek proto (first) + therion (beast) + mammal
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  • prototherian


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