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monophyly (uncountable)

  1. (systematics) In cladistics, the condition of being monophyletic, of including all descendants from a given ancestral species.
    • 2009 January 15, Martin D. Brazeau, “The braincase and jaws of a Devonian 'acanthodian' and modern gnathostome origins”, Nature Volume 457 No. 7227, doi:10.1038/nature07436:
      All of these studies have presupposed acanthodian monophyly and stereotyped acanthodian endoskeletal morphology on Acanthodes, the latest-occurring, and a highly apomorphic genus.


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