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Definition of Phylogeny:
The evolutionary history and line of descent of species or higher taxonomic group.[1].
This is the common definition for Phylogeny, other definitions can be discussed in the article


  1. Phylogenetic relationships are shown in diagrams (cladograms, phylogenetic trees, evolutionary trees).
  2. Paleontology is important for understanding phylogeny. Without the fossils of the many groups of organisms now extinct, it could not be understood how present life forms are interrelated.
  3. Phylogenetics, the science of phylogeny, is part of the larger field of systematics, also including taxonomy.


  1. Lawrence, E. (2005). Henderson’s dictionary of biology. Pearson Education Limited, 13th ed., Harlow. 748 p