cladistics

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Related to cladistically: Cladistic taxonomy

cladistics

(klə-dĭs′tĭks)
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.

cladistics

an approach to CLASSIFICATION by which organisms are ordered and ranked entirely on a basis which reflects recent origin from a common ancestor, i.e. like a family tree. The system is concerned simply with the branching of the tree and not with the degree of difference. The latter is the concern of evolutionary taxonomists who oppose the cladistic approach.
References in periodicals archive ?
Restriction site maps were encoded as a data matrix in which each of 616 differentiable sites was scored as a binary character, with each site specified by restriction enzyme and map location, the latter keyed to the enumeration of nucleotides in the cpDNA sequence of Oryza sativa; cladistically informative characters of the matrix are published here (Appendix 1).
Note, however, that results obtained from analytical methods such as neighbor joining and maximum likelihood estimation are influenced by cladistically uninformative data, including uninformative states of informative characters.
It must also be noted that a number of the asteraceous tribes that include no Ophraella hosts are cladistically interspersed with those that do (Bremer 1994), and that only a small fraction of the species within host-including tribes are actually fed upon.
Local and regional extinctions have occurred frequently, and if such extinctions occur in appropriate places and are not recolonized, the breakup itself will produce cladistically distinct units.
The revised Strauch data matrix was analyzed cladistically using the computer program PAUP 3.