Phylogenetic systematics is a method of classification based on the evolutionary history of organisms, dividing organisms into meaningful groups and subgroups. It was developed by Willi Hennig , an entomologist, in 1950, but was not well accepted until decades later. Evolution results in modifications of characteristics over time. A cladogram is a branching diagram that depicts species divergence from common ancestors. They show the distribution and origins of shared characteristics.
Cladograms are testable hypotheses of phylogenetic relationships.
The Linnaean System is based on a simple hierarchical structure in which organisms are sorted using the nomenclature of Kingdom, Phylum, Class, Order, Family, Genus and Species. As stated in our privacy policy , we fully respect your privacy and will not use your e-mail address for any purpose other than the newsletter subscription. Search the Web with our sponsor, Overture. Without our visitors' support, Enchanted Learning would soon be off-line.