Project 1050: D. A. Legg, M. D. Sutton, G. D. Edgecombe. 2013. Arthropod fossil data increase congruence of morphological and molecular phylogenies. Nature Communications. 4:2485.
Specimen: † Sanctacaris (:ROM 43502)
View: posterior cephalon

Abstract

The relationships of major arthropod clades have long been contentious, but refinements in molecular phylogenetics underpin an emerging consensus. Nevertheless, molecular phylogenies have recovered topologies that morphological phylogenies have not, including the placement of hexapods within a paraphyletic Crustacea, and an alliance between myriapods and chelicerates. Here we show enhanced congruence between molecular and morphological phylogenies based on 753 morphological characters for 309 fossil and Recent panarthropods. We resolve hexapods within Crustacea, with remipedes as their closest extant relatives, and show that the traditionally close relationship between myriapods and hexapods is an artefact of convergent character acquisition during terrestrialisation. The inclusion of fossil morphology mitigates long-branch artefacts as exemplified by pycnogonids: when fossils are included, they resolve with euchelicerates rather than as a sister taxon to all other euarthropods.


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Article DOI: 10.1038/ncomms3485

Project DOI: 10.7934/P1050, http://dx.doi.org/10.7934/P1050
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MorphoBank Project 1050

    Authors' Institutions

    • Natural History Museum, London

    • Imperial College London



    Members

    member name taxa specimens media media
    notes
    Jo Wolfe
    Project Administrator
    311929392
    Maureen Admin
    Full membership
    0000
    MorphoBank Curator
    Full membership
    0000
    Greg Edgecombe
    Full membership
    0000
    David Legg
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    0000


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