Late Cambrian trilobites from the Dolodrook River limestones, eastern Victoria, Australia

John R. Paterson, John R. Laurie

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    Abstract

    An early Late Cambrian (late Mindyallan-Idamean) trilobite fauna is described from limestone bodies in the Dolodrook River area, eastern Victoria. Seven taxa are referred to previously described species: Innitilgnostus inexpectans (Kobayashi, 1938), Pseudagnostus Idalis Opik, 1967, Corynexochus plumula Whitehouse, 1939, Rhyssometopus thielei (Chapman, 191 I), Eugonocare tessel/atum Whitehouse, 1939, Protemnites magnificans Shergold & Webers, 1992 and Meteoraspis etheridgei (Chapman, 1911), seven taxa are left under open nomenclature: Idolagnostus ?agrestis Opik, 1967, Peratagnostus aff. invalidus (Lu & Lin, 1989), Ammagnostus sp., Tomagnostel/a sp., Pterocephaliid? gen. et sp. indet., Tsinaniid gen. et sp. indet. 1 and Tsinaniid gen. et sp. indet. 2, and one represents a new species: Mindycrusta oepiki sp. nov. Protemnites Whitehouse, 1939 is considered to be a senior subjective synonym of Prismenaspis Henderson, 1976a. Two trilobite assemblages are recognised: the Protemnites Assemblage and the Mindycrusta Assemblage. The Protemnites Assemblage is interpreted as representing an autochthonous assemblage inhabiting a moderate to high energy, inner shelf(peritidal) environment. The Mindycrusta Assemblage represents a parautochthonous assemblage inhabiting a low to moderate energy, open ocean-facing, outer shelf to upper slope environment.
    Original languageEnglish
    Pages (from-to)83-111
    Number of pages29
    JournalAssociation of Australasian Palaeontologists memoirs
    Volume30
    Publication statusPublished - 2004

    Keywords

    • Late Cambrian
    • Mindyallan
    • Idamean
    • Australia
    • Gondwana
    • trilobita
    • biostratigraphy

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