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    Comments on the ophiuroid family Protasteridae and description of a new genus from the Lower Devonian of the Fox Bay Formation, Falkland Islands

    Access Status
    Fulltext not available
    Authors
    Hunter, Aaron
    Rushton, A.
    Stone, P.
    Date
    2016
    Type
    Journal Article
    
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    Citation
    Hunter, A. and Rushton, A. and Stone, P. 2016. Comments on the ophiuroid family Protasteridae and description of a new genus from the Lower Devonian of the Fox Bay Formation, Falkland Islands. Alcheringa. 40 (4): pp. 429-442.
    Source Title
    Alcheringa
    DOI
    10.1080/03115518.2016.1218246
    ISSN
    0311-5518
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/51045
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Australasian Palaeontologists.Asterozoan fossils are comparatively rare in Gondwana compared with Laurentia, especially in the Devonian. We examined the only fossil ophiuroid yet known from the Falkland Islands and assess its significance for the evolution of the clade. This ophiuroid, herein distinguished as a new genus and species, Darwinaster coleenbiggsae, belongs to the same suprageneric group as Protaster, which was established on a series of Middle–Upper Ordovician taxa and persisted into the late Palaeozoic remarkably little changed in morphology. This single example is part of a much wider fauna that includes fossils from the Bokkeveld Group, South Africa and the Precordillera of Argentina. Existing palaeobiogeographic reconstructions confirm that these faunas once existed on contiguous terranes and characterized a distinct suite of similar palaeoenvironments within the Malvinokaffric Realm. This study reviews the existing record of Devonian asterozoans and revises Protasteridae.

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