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词汇 Metatheria
释义

Definition of Metatheria in English:

Metatheria

plural noun ˌmɛtəˈθɪərɪəˌmedəˈTHirēə
Zoology
  • A group of mammals that comprises the marsupials.

    〔动〕后兽亚纲,后兽下纲。比较EUTHERIA

    Infraclass Metatheria, subclass Theria

    Compare with Eutheria
    Example sentencesExamples
    • These evolutionary ties between the South American Microbiotheriidae and the Australian marsupials help to illuminate the biogeographic history of the Metatheria.
    • The data presented here encompassed 5 Metatheria (order Didelphimorphia) and 62 Eutheria: 15 Xenarthra, 24 Euarchontoglires, as well as 23 Laurasiatheria (22 Chiroptera and 1 species from Perissodactyla).
    • Yet the teeth of deltatheroidans are of remarkably primitive construction; if they are related to marsupials, an extremely early divergence of Metatheria and Eutheria is implied.
    • In all cases, a representative of the mammalian infraclass Metatheria was designated as an outgroup.

Origin

Modern Latin (plural), from meta- (expressing change) + Greek thēria, plural of thērion 'wild animal'.

Definition of Metatheria in US English:

Metatheria

plural nounˌmedəˈTHirēə
Zoology
  • A group of mammals that comprises the marsupials.

    〔动〕后兽亚纲,后兽下纲。比较EUTHERIA

    Infraclass Metatheria, subclass Theria

    Compare with Eutheria
    Example sentencesExamples
    • In all cases, a representative of the mammalian infraclass Metatheria was designated as an outgroup.
    • The data presented here encompassed 5 Metatheria (order Didelphimorphia) and 62 Eutheria: 15 Xenarthra, 24 Euarchontoglires, as well as 23 Laurasiatheria (22 Chiroptera and 1 species from Perissodactyla).
    • Yet the teeth of deltatheroidans are of remarkably primitive construction; if they are related to marsupials, an extremely early divergence of Metatheria and Eutheria is implied.
    • These evolutionary ties between the South American Microbiotheriidae and the Australian marsupials help to illuminate the biogeographic history of the Metatheria.

Origin

Modern Latin (plural), from meta- (expressing change) + Greek thēria, plural of thērion ‘wild animal’.

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