Microvertebrate biostratigraphy of Upper Devonian (Frasnian) carbonate rocks in the Canning and Carnarvon Basins of Western Australia

Kate Trinajstic, Annette George

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Shark teeth and scales from the Gneudna Formationtype section, Carnarvon Basin are rare, but they representa diverse fauna as well as being the first Frasnianchondrichthyan remains found in Western Australia. In contrastnumerous shark teeth and scales have been obtainedfrom coeval sections in the Canning Basin. Teeth referred toas Phoebodus bifurcatus, Phoebodus fastigatus, Phoebodus cf.fastigatus, Phoebodus latus, Phoebodus sp. C and Protacrodussp. 1 are described from two Canning Basin localities: HorseSpring Range and McIntyre Knolls. The phoebodont speciesdescribed here have a global distribution and can, therefore,be placed within the standard Frasnian phoebodont zonation.The shark remains from the Gneudna Formation type sectioninclude one new genus Emerikodus ektrapelus gen. et sp.nov., described along with Helodontidae indet and Elasmobranchiigen. et sp. indet. It is proposed that the faunaldifferences observed between the localities are a result ofenvironmental differences. In addition to shark remains,scales from the thelodont Australolepis seddoni were alsorecovered from each locality. The well-dated Zone 6–10conodont faunas at Horse Spring constrain the range ofA. seddoni with which they occur, and importantly indicatethat the Gneudna Formation type section is wholly Frasnian.
    Original languageEnglish
    Pages (from-to)641-659
    JournalPalaeontology
    Volume52
    Issue number3
    DOIs
    Publication statusPublished - 2009

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