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Chresonym
In biodiversity informatics, a chresonym refers to the cited use of a taxon name, usually a species name, within a publication. The term is derived from the Greek "chresis" meaning "a use" and refers to published usage of a name.
The technical meaning of the related term "synonym" is for different names that refer to the same object or concept. As noted by Hobart and Rozella Smith,〔 zoological systematists had been using "the term (synonymy) in another sense as well, namely in reference to all occurrences of any name or set of names (usually synonyms) in the literature." Such a "synonymy" could include multiple listings, one for each place the author found a name used, rather than a summarized list of different synonyms. The term "chresonym" was created to distinguish this second sense of the term "synonym."〔 The concept of synonymy is furthermore different in the zoological and botanical codes of nomenclature.
A name that correctly refers to a taxon is further termed an orthochresonym while one that is applied incorrectly for a given taxon may be termed a heterochresonym.〔Dubois, A. (2000). Synonymies and related lists in zoology: general proposals, with examples in herpetology. ''Dumerilia''. 4(2): 33–98.〕〔Dubois A (2010) (Retroactive changes should be introduced in the Code only with great care: problems related to the spellings of nomina. ) Zootaxa 2426:1–42〕
== Example (orthochresonymy) ==
Species names consist of a genus part and a species part to create a binomial name. Species names often also include a reference to the original publication of the name by including the author and sometimes the year of publication of the name. As an example, the sperm whale, ''Physeter catodon'', was first described by Linnaeus in the 10th edition ''Systema Naturae'' published in 1758. Thus, the name may also be referenced as ''Physeter catodon'' Linnaeus 1758. That name was also used by Harmer in 1928 to refer to the species in the Proceedings of the Linnaean Society of London and of course, it has appeared in numerous other publications since then. Taxonomic catalogues, such as "Catalog of Living Whales" by Philip Hershkovitz, may reference this usage with a Genus+species+authorship convention that may appear to indicate a new species (a homonym) when in fact it is referencing a particular usage of a species name (a chresonym). Hershkovitz, for example refers to ''Physeter catodon'' Harmer 1928, which can cause confusion as this name+author combination really refers to the same name that Linnaeus first published in 1758.
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