holotype - définition. Qu'est-ce que holotype
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Qu'est-ce (qui) est holotype - définition

SINGLE PHYSICAL EXAMPLE (OR ILLUSTRATION) OF AN ORGANISM, KNOWN TO HAVE BEEN USED WHEN THE SPECIES (OR LOWER-RANKED TAXON) WAS FORMALLY DESCRIBED
Type-fossil; Type fossil; Genoholotype; Epitype; Holotypic; Isotype (biology); Holotype specimen; Single specimen
  • Holotype with red type label affixed
  • Encarsia accenta]]''
  • Holotype of ''[[Marocaster coronatus]]'', [[MHNT]]

holotype         
['h?l?t??p]
¦ noun Botany & Zoology a single type specimen upon which the description and name of a new species is based.
Holotype         
A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype.

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Holotype

A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept.

For example, the holotype for the butterfly Plebejus idas longinus is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany, an isotype is a duplicate of the holotype, where holotype and isotypes are often pieces from the same individual plant or samples from the same gathering.

A holotype is not necessarily "typical" of that taxon, although ideally it is. Sometimes just a fragment of an organism is the holotype, particularly in the case of a fossil. For example, the holotype of Pelorosaurus humerocristatus (Duriatitan), a large herbivorous dinosaur from the early Jurassic period, is a fossil leg bone stored at the Natural History Museum in London. Even if a better specimen is subsequently found, the holotype is not superseded.