One of the mysteries of the English language finally explained.
A group of mammals that comprises the monotremes and their extinct relatives.
Subclass Prototheria, class MammaliaCompare with Theria
- ‘They are often placed in a separate subclass from other mammals, Prototheria.’
- ‘Triconodonta were viewed as broadly ancestral to the extinct Docodonta and to living monotremes, collectively grouped (often with Multituberculata) as Prototheria.’
- ‘Later cladistic studies, beginning with that of Kemp, called into question the integrity of a broadly conceived ‘Prototheria.’’
- ‘As noted, recognition of skull resemblances to monotremes and triconodonts led to later referral to ‘Prototheria,’ within a monophyletic Mammalia.’
Modern Latin (plural), from proto- ‘first, original’ + Greek thēr ‘wild beast’.
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