Extant taxon

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In biology, extant taxa (singular, taxon), such as species, genera and families, are taxa still in existence, meaning still alive as opposed to extinct. For example, the moose is an extant species, while the dodo is an extinct species. However, extant refers primarily to a species that is extinct from a localized area. For instance, the Northern Rocky Mountain Wolf became extant, or rather, was extirpated from Yellowstone National Park, but was then reintroduced later. Likewise, in the group of molluscs known as the cephalopods, as of 1987 there were approximately 600 extant species and 7,500 extinct species.[1]

References[edit]

  1. ^ Barnes, Robert D. (1987). Invertebrate Zoology (5th ed.). Philadelphia: Saunders College Publishing. ISBN 0-03-008914-X.