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Extant is a term commonly used in biology to refer to taxa (such as species, genera or families) that are still in existence (living). The term extant contrasts with extinct. For example, Brandt's Cormorant is an extant species, while the Spectacled Cormorant is an extinct species. Likewise, of the group of molluscs known as the cephalopods, there are approximately 600 extant species and 7500 extinct species.[1]

References

  1. ^ Barnes, Robert D. (1987), Invertebrate Zoology (5th edition), Saunders College Publishing, Philadelphia, USA, ISBN 003008914X 

External links


Simple English

In biology, the extant taxon is a term used to refer to species, genera or families that are still in existence (living). The opposite is extinct taxon. Of the group of molluscs known as the cephalopods, there are approximately 600 extant species and 7500 extinct species (Barnes, 1987). [1]

Notes and references

  1. http://www.iucn.org/themes/ssc/red_list_2004/GSAexecsumm_EN.htm .

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