Metatheria
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
-
pouched animals
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