Definitions from Wikipedia (Prototheria)

▸ noun:  (from Greek πρώτος, prōtos, first, + θήρ, thēr, wild animal) an obsolete subclass of mammals which includes the living Monotremata and to which a variety of extinct groups, including Morganucodonta, Docodonta, Triconodonta and Multituberculata, have also been assigned.





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