Gourt > Science > Biology > Taxonomy > Cladistics (2)
Cladistics (Greek: klados = branch) is a branch of biology that determines the evolutionary relationships between organisms based on derived similarities. It is the most prominent of several forms of phylogenetic systematics, which study the evolutionary relationships between organisms. Cladistics is a method of rigorous analysis, using "shared derived traits" (synapomorphies: see below) of the organisms being studied. Cladistic analysis forms the basis for most modern systems of biological classification, which seek to group organisms by evolutionary relationships. In contrast, phenetics groups organisms based on their overall similarity, while approaches that are more traditional tend to rely on key characters. Willi Hennig (1913 - 1976) is widely regarded as the founder of cladistics.
As the end result of a cladistic analysis, treelike relationship-diagrams called "cladograms" are drawn up to show different hypotheses of relationships. A cladistic analysis can be based on as much or as little information as the researcher selects. Modern systematic research is likely to be based on a wide variety of information, including DNA-sequences (so called "molecular data"), biochemical data and morphological data.
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Introduction to Cladistics - Cladistics is a particular method of hypothesizing relationships among organisms based on the idea that members of a group share a common evolutionary history.
Phylogenetics Methodology - Introduction to various phylogenetic statistical methodologies.
Understanding Cladistics - Short introduction from the American Museum of Natural History.
Meta Description: [ The American Museum of Natural History is one of the world's preeminent institutions for scientific research and education, with collections of more than 32 million specimens and artifacts., The American Museum of Natural History is one of the world's preeminent institutions for scientific resear... ]
What is Cladistics? - The methods and terminology of phylogenetic systematics explained by the magazine Fossil News.
Meta Description: [ The methods and terminology of phylogenetic systematics explained. ]
Willi Hennig Society - Society of scientists studying cladistics.
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