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词汇 Prototheria
释义

Definition of Prototheria in English:

Prototheria

plural noun ˌprəʊtə(ʊ)ˈθɪərɪəˌprōdəˈTHirēə
Zoology
  • A group of mammals that comprises the monotremes and their extinct relatives.

    〔动〕原兽亚纲哺乳动物。比较THERIA

    Subclass Prototheria, class Mammalia

    Compare with Theria
    Example sentencesExamples
    • As noted, recognition of skull resemblances to monotremes and triconodonts led to later referral to ‘Prototheria,’ within a monophyletic Mammalia.
    • 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.’

Origin

Modern Latin (plural), from proto- 'first, original' + Greek thēr 'wild beast'.

Definition of Prototheria in US English:

Prototheria

plural nounˌprōdəˈTHirēə
Zoology
  • A group of mammals that comprises the monotremes and their extinct relatives.

    〔动〕原兽亚纲哺乳动物。比较THERIA

    Subclass Prototheria, class Mammalia

    Compare with Theria
    Example sentencesExamples
    • Triconodonta were viewed as broadly ancestral to the extinct Docodonta and to living monotremes, collectively grouped (often with Multituberculata) as Prototheria.
    • They are often placed in a separate subclass from other mammals, Prototheria.
    • As noted, recognition of skull resemblances to monotremes and triconodonts led to later referral to ‘Prototheria,’ within a monophyletic Mammalia.
    • Later cladistic studies, beginning with that of Kemp, called into question the integrity of a broadly conceived ‘Prototheria.’

Origin

Modern Latin (plural), from proto- ‘first, original’ + Greek thēr ‘wild beast’.

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