Metatheria

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Definition

Noun: - A subclass of mammals comprising the marsupials or pouched animals: Metatheria is a taxonomic group that includes all marsupial mammals, which are characterized primarily by giving birth to relatively undeveloped live young that typically complete their development in a maternal pouch (marsupium).

Usage Examples
  • Noun:
    • The kangaroo and koala are classic examples of animals belonging to the Metatheria.
    • Fossil evidence suggests the Metatheria diverged from other mammalian lineages millions of years ago.
Advanced Usage
  • In taxonomic hierarchy: The term is used in scientific classification. It sits below the class "Mammalia" and above various infraclasses and orders like Diprotodontia (kangaroos, wombats) and Dasyuromorphia (Tasmanian devils).
    • The study focused on the evolutionary history of the Metatheria.
Variants and Related Words
  • Metatherian (adj/noun): Of or pertaining to the Metatheria; a member of this group.
    • Metatherian mammals have distinct reproductive strategies.
  • Marsupial (noun): The common name for members of the Metatheria.
    • Most, but not all, marsupials are native to Australia and the Americas.
Synonyms
  • Marsupialia: This is often used as a synonym, though technically "Marsupialia" is sometimes considered an infraclass within Metatheria.
  • Pouched mammals: A descriptive, non-scientific synonym.
Related Terms (Contextual)
  • Prototheria: The subclass containing egg-laying mammals (monotremes like the platypus).
  • Eutheria: The subclass containing placental mammals (like humans, dogs, and whales).
Noun
  1. pouched animals

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