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phylogenetic speciesespèce phylogenetique (fr.); phylogenetische Art (ger.)

  • The view that a species should be defined only by its diagnosibility; i.e. that it consists of a population with a unique set of features (preferably derived). (A Dictionary of Zoology 1999)
    The use of the word Celtic, as if it were the name of a phylogenetic species, has naturally led to hopeless confusion in the attempts to formulate race-characters for the Celtic skull – confusions of a kind which tend to bring physical anthropology into discredit.
    Macalister, A. (1893). The study of man. Popular Science Monthly, Jan. 1893, 303-318: 307.

    The phylogenetic species, a division or section of a line of biological succession

    Cook, O.F. (1899). Four categories of species. Amer. Nat. 33, 287-297: 293; cf. Brown, A.E. (1906). Ontogenetic species and convergent genera. Science 23, 146-97: 146.


    A phylogenetic species concept is advocated, which views species as monophyletic groups of organisms, the smallest such groups recognized in a formal classification. Assignment of species rank to a particular group should depend on the causal factors acting to maintain that group as an independent lineage. Epigenetic constraints may prove to be the most important factor producing and maintaining species lineages.

    Mishler, B.D. (1985). The morphological, developmental, and phylogenetic basis of species concepts in bryophytes. The Bryologist 88, 207-214: 207.


    According to the phylogenetic concept only monophyletic groups are acceptable

    Donoghue, M.J. (1985). A critique of the biological species concept and recommendations for a phylogenetic alternative. Bryologist 88, 172-181: 178.