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:

Kingdom

Phylum (animals or plants) or Division (plants)

Class

Order

Family

Genus

Species

Subspecies

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:

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Reino Unido: Banco Central mantém taxa de juros em 0,50% ao ano, conforme previsões.
GrauA (Grau A-Trading Tips) Thu, 05 Nov 2009 12:55:39 -0000
Reino Unido: Banco Central mantém taxa de juros em 0,50% ao ano, conforme previsões.
Time linkages between pollination onsets of different taxa over an... http://tinyurl.com/ycl2zq4
Sandy_K90 (Sandra Kemp) Thu, 05 Nov 2009 12:55:16 -0000
Time linkages between pollination onsets of different taxa over an... http://tinyurl.com/ycl2zq4
BC britânico mantém taxa de juro e eleva compra de ativos http://bit.ly/1PVA5o
g1economia (G1 - Economia) Thu, 05 Nov 2009 12:55:12 -0000
BC britânico mantém taxa de juro e eleva compra de ativos http://bit.ly/1PVA5o
Time linkages between pollination onsets of different taxa over an... http://tinyurl.com/ycl2zq4
janettew2hu (Janette Guerrero) Thu, 05 Nov 2009 12:54:53 -0000
Time linkages between pollination onsets of different taxa over an... http://tinyurl.com/ycl2zq4
G1 Economia BC britânico mantém taxa de juro e eleva compra de ativos http://bit.ly/2c9UOT
_Invo (Involuntario.) Thu, 05 Nov 2009 12:53:25 -0000
G1 Economia BC britânico mantém taxa de juro e eleva compra de ativos http://bit.ly/2c9UOT
RT @xpcorretora: Boe mantém taxa de juros em 0,5% para novembro #uberlandia
apisinvest (Ápis Investimentos) Thu, 05 Nov 2009 12:53:03 -0000
RT @xpcorretora: Boe mantém taxa de juros em 0,5% para novembro #uberlandia

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