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Related to Plesiomorphies: Plesiomorphy, Cladistic analysis, cladistics


n. (used with a sing. verb)
A system of classification based on the presumed phylogenetic relationships and evolutionary history of groups of organisms.

cla·dis′tic, cla·dis′ti·cal adj.
cla·dis′ti·cal·ly adv.


(Biology) (functioning as singular) biology a method of grouping animals that makes use of lines of descent rather than structural similarities
[C20: New Latin, from Greek klādos branch, shoot]
cladism n
cladist n


(kləˈdɪs tɪks)

n. (used with a pl. v.)
1. a system of classification of organisms based on the branchings of clades.
2. the study of such systems.
clad•ist (ˈklæd ɪst) n.
cla•dis′tic, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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
taxonomy - (biology) study of the general principles of scientific classification
References in periodicals archive ?
The group exhibits numerous plesiomorphies in appendages, segmentation, and armature (Huys and Boxshall 1991; Boxshall and Halsey 2004).
However, Yeates (1994) considered the characters provided by Bowden (1985) to support Dischistini as plesiomorphies, thus making the tribe paraphyletic, and to be used only for taxonomic convenience.
Furthermore, although genera of the "Brachyplatys-group" are united by a number of apparent synapomorphies, the characters shared by members of the "Coptosoma-group" are mainly plesiomorphies. Ahmad (1990), Ahmad and Moizuddin (1992) and Davidova-Vilimova (2006) proposed a formal subfamily level classification more or less based on Jessop's (1983) categories.