cladistics

(redirected from cladistically)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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).
Relationships among the haplotypes were described phenetically using the UPGMA and Neighbor-joining programs in NTSYS (versions 1.5-1.7, Rohlf 1990), and cladistically using PAUP (version 3.0s, Swofford 1990) and MacClade (versions 2.1-3.0, Maddison and Maddison 1987, 1990).
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 3.0s (Phylogenetic Analysis Using Parsimony; Swofford 1991).