Class (biology)

For other uses, see Class (disambiguation).
This article is about the taxonomic grouping of related organisms; it is not to be confused with the ecological grouping of unrelated plant taxa in phytosociology.

In biological taxonomy, class (Latin: classis) is a taxonomic rank, as well as a taxonomic unit (i.e., a taxon) in that rank. It is a group of related taxonomic orders. Other well-known ranks in descending order of size are domain, kingdom, phylum, order, family, genus, and species, with class ranking between phylum and order.


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