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    Comprehending conodonts

    Access Status
    Fulltext not available
    Authors
    Barham, Milo
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Barham, M. 2015. Comprehending conodonts. Geology Today. 31 (2): pp. 74-80.
    Source Title
    Geology Today
    DOI
    10.1111/gto.12092
    ISSN
    0266-6979
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/15384
    Collection
    • Curtin Research Publications
    Abstract

    Conodonts were small, thin, elongate jawless creatures that were a common component of the marine fauna from the late Cambrian, throughout the Palaeozoic and into the Triassic. For the majority of conodont research history, speculations on conodont affinity were restricted to the histology and arrangement of their mineralized tissues—‘conodont elements’. These conodont elements comprise millimetre-scale phosphatic microfossils that superficially resemble teeth, and are commonly recovered from the residues of appropriately aged, disaggregated sedimentary rocks. It has only been in the last three decades, since the discovery of exceptionally preserved soft tissues, that the debate on conodont affinity has been refined, though it has hardly been less vigorously debated. Despite being studied extensively for over more than a century and a half, conodonts retain significant enigmatic qualities. Although many geologists today are familiar with the name, knowledge of conodont biology and ecology are often surprisingly lacking or confused, and conodonts remain as largely disembodied microfossil curiosities. Despite this, conodont elements are extensively and variously used in biostratigraphy, thermal maturation studies and palaeoenvironmental reconstructions, while conodonts themselves occupy a potentially critical position in the evolutionary tree of our own phylum—the chordates.

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