Taxon
From Free net encyclopedia
A taxon (plural taxa), or taxonomic unit, is a grouping of organisms (named or unnamed). Once named, a taxon will usually have a rank and can be placed at a particular level in a hierarchy.
A broad scheme of ranks in hierarchical order:
A prefix is used to indicate a ranking of lesser importance. The prefix super- indicates a rank above, the prefix sub- indicates a rank below. In zoology the prefix infra- indicates a rank below sub-. For instance:
- Superclass
- Class
- Subclass
- Infraclass
Do note that rank is relative, and restricted to the particular scheme used. For example, liverworts have been grouped, in various systems of classification, as a family, order, or a class. The use of ranks is challenged by users of cladistics and has led to the PhyloCode being proposed.
See also
cs:Taxon de:Taxon et:Takson es:Taxón eo:Taksono fr:Taxon it:Taxon nl:Taxon ja:タクソン no:Gruppe (biologi) pl:Takson ru:Таксон sk:Taxón fi:Taksoni sv:Taxon tr:Takson uk:Таксон