New Subclasses of Taxon · YYNN

Taxon

Subclasses

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Basic unit of taxonomic classification, below genus

Plant or grouping of plants selected for desirable characteristics

Monotypic taxon

Taxonomic group with only one subordinate taxon

taxon described on the basis of fossil material

Group of a common ancestor and all descendants

Evolutionary grade

Non-monophyletic grouping of organisms united by morphological or physiological characteristics

Paraphyletic group

in cladistic analysis, an ancestral species and some, but not all, of its descendants