Research Article

Relationships of Cetacea (Artiodactyla) Among Mammals: Increased Taxon Sampling Alters Interpretations of Key Fossils and Character Evolution

  • Michelle Spaulding mail,

    Affiliations: Department of Earth & Environmental Sciences, Columbia University, New York, New York, United States of America, Division of Paleontology, American Museum of Natural History, New York, New York, United States of America

  • Maureen A. O'Leary,

    Affiliation: Department of Anatomical Sciences, Stony Brook University, Stony Brook, New York, United States of America

  • John Gatesy

    Affiliation: Department of Biology, University of California Riverside, Riverside, California, United States of America

  • Published: September 23, 2009
  • DOI: 10.1371/journal.pone.0007062
  • Published in PLOS ONE

Reader Comments (2)

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or "branch-based"

Posted by keesey on 27 Sep 2009 at 17:18 GMT


This type of definition has been renamed "branch-based" in more recent drafts of the PhyloCode, in order to avoid confusion with the term "stem group" (referring to a paraphyletic group consisting of a total clade minus its corresponding crown clade).

Competing interests declared: I am currently a member of the Committee on Phylogenetic Nomenclature, the governing body for the PhyloCode.