horizontal classification

horizontal classification

the type of CLASSIFICATION that stresses the grouping of species at a similar level of evolution rather than the position on the same phyletic line. Compare VERTICAL CLASSIFICATION.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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This negative solves trial according horizontal classification.
The test of gear mechanism elements by horizontal classification is possible to describe by a graph.
If, as understood by modern systematists, evolution is mostly a vertical process, then a methodology that would lead to a horizontal classification improperly represents the phylogeny.

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