(1) The Journal of the Willi Hennig Society. (2) The scientific discipline of classifying organisms according to the doctrine of Willi Hennig's 1966 book. (3) The belief that the organisation of taxa into groups can only be done by the identification of synapomorphies for that group.
A phylogenetic approach that stresses the importance of understanding the evolutionary relevance of the characters that are studied. A particular systematic approach to building evolutionary trees and interpreting their meaning.
Method of classifying organisms into groups (taxa) based on 'recency of common descent ' as judged by the possession of shared derived (i.e., not primitive) characters.
an approach that classifies taxa according to the time when branches appear along the phylogenetic tree.
The branch of systematics that uses shared derived characters to determine the order of branching events in speciation and therefore which species are most closely related. Cladistics is concerned only with evolutionary relationships, not classification.
The system of classification based on the phylogenetic relationships and evolutionary history of groups of organisms
Classification system that places organisms into clades based on shared derived traits (synapomorphies). (See also phylogenetic classification.)
A classification method that constructs phylogenies using characteristics unique to each taxonomic group.
A method of grouping animals by measurable likenesses or homologues; a system for describing the relationship between types of organism based on the assumption that their sharing of a unique characteristic (e.g., mammary glands of mammals) possessed by no other organisms indicates their common descent from a single common ancestor.
A system of classification in which the only groups formally recognised are clades. Introduction to cladistics
The taxonomic method which groups organisms based upon their possession of shared, derived characters. Also widely known as phylogenetic systematics. See also numerical taxonomy and evolutionary taxonomy.
another name for phylogenetic systematics
same as phylogenetic systematics
The science of evolutionary genealogy.
A classification system based on order of evolutionary branching rather than on present similarities and differences. Compare with phenetic taxonomy.
A method for constructing phylogenies based on shared derived characters of species, originally rigorously detailed by Willi Hennig in 1950.
The practice of classifying organisms based on their phylogenetic relationships and evolutionary history. Its goal is to delineate 'natural' groups which reflect 'true' relationships.
A system of biological taxonomy based on the quantitative analysis of comparative data and used to reconstruct trees summarizing the (assumed) phylogenetic relations and evolutionary history of groups of organisms
A classification system that classifies organisms on the basis of historical sequences by which they have diverged from common ancestors.
Cladistics is a method of classifying organisms based on common ancestry and the branching of the evolutionary family tree. Organisms that share common ancestors (and therefore have similar features) are grouped into taxonomic groups called clades. Cladistics can also be used to predict properties of yet-to-be discovered organisms.
Cladistics is a philosophy of classification that arranges organisms only by their order of branching in an evolutionary tree and not by their morphological similarity, in the words of Luria et al (1981). A major contributor to this school of thought was the German entomologist Willi Hennig, who referred to it as phylogenetic systematics (Hennig, 1979). The word cladistics is derived from the ancient Greek , klados, "branch."
