PMID: 15329010Aug 27, 2004Paper

Highest level of division in classification of organisms. 3. Monodermata and Didermata

Zhurnal obshcheĭ biologii
A I Shatalkin

Abstract

The deepening our knowledge and embrassing the larger array of the investigated organisms leads to replacement of typological classifications with phylogenetic ones. This process seems to be the main stream of modern systematics. But typological classifications have not lost the value, remaining the important tool of the description of phylogeny. It is especially obvious today when molecular reconstructions are using so widely. However resulted phylogenetic classifications are difficult for understandable interpretation. Therefore phylogeneticist is interested in elaboration of typological classifications that can help to explain the results. As an example the phylogenetic classifications of organisms proposed recently by Cavalier-Smith (1998, 2002) and Gupta (1998, 2000) are considered. The modified system of Gupta is the most adequate description of organism phylogeny. Basal clostridia and togobacteria have to the greatest degree kept features of a common ancestor of organisms. From this common ancestor evolution spread by two phyletic lines. One of them included Gram-negative bacteria. The main groups of them have branched of from a common ancestor in the following order: (Deinococci, Chloroflexi) --> (Cyanobacteria) --> (Ch...Continue Reading

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