cladistics -
a system of biological taxonomy based on the quantitative analysis of comparative data and used to reconstruct cladograms summarizing the (assumed) phylogenetic relations and evolutionary history of groups of organisms
cladistics -
An approach to biological systematics in which organisms are grouped based upon synapomorphies shared derived characteristics only, and not upon symplesiomorphies shared ancestral characteristics.
OmegaWiki Dictionary
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cladistics A philosophy of classification that arranges organisms only by their order of branching in an evolutionary tree and not by their morphological similarity.