cladogram
Sign in to savethumb|250px|A horizontal cladogram, with the root to the left thumb|250px|Two vertical cladograms, the root at the bottom
Article
16 sectionsContents
- Generating a cladogram
- Molecular versus morphological data
- Plesiomorphies and synapomorphies
- Homoplasies
- What is not a cladogram
- Cladogram selection
- Terminology
- Statistics
- Incongruence length difference test (or partition homogeneity test)
- Measuring homoplasy
- Consistency index
- Retention index
- Homoplasy Excess Ratio
- See also
- References
- External links
thumb|250px|A horizontal cladogram, with the root to the left thumb|250px|Two vertical cladograms, the root at the bottom
A cladogram (from Greek klados "branch" and gramma "character") is a diagram used in cladistics to show evolutionary relations (common descent) between groups of organisms. Cladograms are a type (subset) of phylogenetic trees that do not normally show evolutionary time but are required to meet specific criteria defined by cladistics. Like other evolutionary trees, cladograms can be used show actual, hypothesized, or even hypothetical descent. Modern cladograms are most often generated algorithmically through computational phylogenetics using genetic data, typically from DNA sequencing, as part of a molecular systematics approach.