Editing Binomial nomenclature (section)

==Other ranks==
{{main|Biological nomenclature|Trinomial nomenclature|Infraspecific name (botany)}}

Binomial nomenclature, as described here, is a system for naming species. Implicitly, it includes a system for naming genera, since the first part of the name of the species is a genus name. In a classification system based on ranks, there are also ways of naming ranks above the level of genus and below the level of species. Ranks above genus (e.g., family, order, class) receive one-part names, which are conventionally not written in italics. Thus, the house sparrow, ''[[House sparrow|Passer domesticus]]'', belongs to the family [[Passeridae]]. [[Family (biology)|Family]] names are normally based on genus names, such as in zoology,<ref>{{Cite web |title=The Code Online {{!}} International Commission on Zoological Nomenclature |url=https://code.iczn.org/chapter-4-criteria-of-availability/article-11-requirements/?frame=1#art-11-7 |access-date=2025-02-01 |website=www.iczn.org |at=11.7. Family-group names}}</ref> although the endings used differ between zoology and botany.

Ranks below species receive three-part names, conventionally written in italics like the names of species. There are significant differences between the ''ICZN'' and the ''ICNafp''. In zoology, the only formal rank below species is subspecies and the name is written simply as three parts (a trinomen). Thus, one of the subspecies of the [[olive-backed pipit]] is ''Anthus hodgsoni berezowskii''. Informally, in some circumstances, a [[Form (zoology)|form]] may be appended. For example ''[[Harmonia axyridis]]'' f. ''spectabilis'' is the harlequin ladybird in its black or melanic forms having four large orange or red spots. In botany, there are many ranks below species and although the name itself is written in three parts, a "connecting term" (not part of the name) is needed to show the rank. Thus, the American black elder is ''Sambucus nigra'' subsp. ''canadensis''; the white-flowered form of the ivy-leaved cyclamen is ''[[Cyclamen hederifolium]]'' f. ''albiflorum''.<ref>{{Cite web |title=Article 26 |url=https://www.iapt-taxon.org/nomen/pages/main/art_26.html?zoom_highlight=below+species |access-date=2025-02-01 |website=www.iapt-taxon.org}}</ref>