taxon


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Related to taxon: derived character

taxon

(pl. taxa), in biology, a term used to denote any group or rank in the classificationclassification,
in biology, the systematic categorization of organisms into a coherent scheme. The original purpose of biological classification, or systematics, was to organize the vast number of known plants and animals into categories that could be named, remembered, and
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 of organisms, e.g., class, order, family.

Taxon

 

a group of discrete objects related by more or less common properties and characteristics, thereby serving as a basis for assigning the objects to a particular taxonomic category. The identification of a taxon may be based on various properties and characteristics of objects, such as common origin, structure, composition, shape, or function, but the set of properties and characteristics in each case must be necessary and sufficient for the given taxon to occupy a unique place in a system and not intersect other taxa.

In dealing with problems of systematics and taxonomy, it is sometimes important to make a clear distinction between the terms “taxon” and “taxonomic category.” A taxon always characterizes a specific set of objects, such as objects in the organic world, units of geographic description, or linguistic units. A taxonomic category reflects only the designation and logical conditions for distinguishing the given level of the hierarchy or organizational ranking of a system. Thus, in biology, where these categories are used most often, the concepts of species, genus, and family belong to the class of taxonomic categories, whereas the Scotch pine and rodents, for example, form taxa.

taxon

[′tak‚sän]
(systematics)
A taxonomic group or entity.
References in periodicals archive ?
I has an additional taxon (E) with the informative value (1), some
This taxon was defined as follows: "The class of interventions designed to promote both career and academic self-efficacy and motivation through sustained and meaningful interactions with work sites in the community.
especially when the status of a taxon on the list is deemed endangered or threatened throughout its entire range.
The diversity patterns of gall-midges observed in this study are supported by previous investigation where the size of plant taxon was positively correlated with the richness of gall-inducing insects (Fernandes 1992, Goncalves-Alvim & Fernandes 2001, Mendonca 2007).
These three measures of diversity were used because they each represent the taxon abundance disproportionally due to the differing diversity of order (q) used by most nonparametric diversity indices (Jost 2006).
Apparently, the diverse appearance of the flowers is a typical trait for this taxon.
Studying the number of genera per age and taxon (N) enables us to understand variations in biodiversity.
The frequency of occurrence was calculated for each taxon and represents the percentage of survey areas from which a given taxon was present.
Biotic Index scores are determined by the average of tolerance values given to each represented taxon, with low scores assigned to taxa that are intolerant of poor water quality.
The sequences from the two individuals in each taxon were identical (Table 1).