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    • 1. Paleontological Contributions (2009-present)
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    • Paleontological Institute
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    • 1. Paleontological Contributions (2009-present)
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    The paracladistic approach to phylogenetic taxonomy

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    Carter 12.pdf (2.059Mb)
    Issue Date
    2015-04-30
    Author
    Carter, Joseph G.
    Altaba, Cristian R.
    Anderson, Laurie C.
    Campbell, David
    Fang, Zong-jie
    Harries, Peter J.
    Skelton, Peter W.
    Publisher
    Paleontological Institute
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Is part of series
    Paleontological Contributions;12
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    Abstract
    The inclusion of some paraphyletic groups in a temporally and taxonomically comprehensive phylogenetic classification is inevitable because cladistic methodology is incapable of excluding the possibility that a structurally (i.e., based on the branching pattern of a given cladogram) monophyletic group contains the ancestor of another group, i.e., that it is historically paraphyletic. Paracladistics is proposed as a pragmatic synthesis of phylogenetic and evolutionary taxonomy in which true monophyly is distinguished from structural monophyly with historical paraphyly, some structurally paraphyletic groups are retained in the interest of nomenclatorial continuity and stability, and both unranked and suprageneric ranked taxon names are defined phylogenetically. Ancestral groups are structurally paraphyletic or structurally monophyletic but historically paraphyletic sets of species that are believed to contain the ancestor for the most recent common ancestor of a descendent group. Historical paraphyly is determined by considering evidence of nesting in cladistic analyses, timing of first appearances in the fossil record, polarity in character evolution, and taxa that are morphologically intermediate between groups of species. The decision to name an ancestral group is based on the same criteria as the decision to name a clade. Ancestral groups are defined in the same manner as clades, except that their descendent group(s) are designated as external specifiers. Recognizing that two supposedly monophyletic, cladistically defined sister taxa can represent ancestral and descendent groups has implications for inferring their times of origination. To illustrate the advantages of the paracladistic approach to phylogenetic taxonomy, alternative paracladistic and phylogenetic classifications of the crown group families of Nuculanoidea (Mollusca, Bivalvia) are presented.
    URI
    http://hdl.handle.net/1808/17551
    DOI
    https://doi.org/10.17161/PC.1808.17551
    ISSN
    1946-0279
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    • 1. Paleontological Contributions (2009-present) [32]

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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