Fish remains, mostly otoliths, from the non-marine Early Miocene of Otago, New Zealand

Werner Schwarzhans, Richard Scofield, Alan Tennyson, Jennifer Worthy, Trevor H. Worthy

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    27 Citations (Scopus)

    Abstract

    Fish remains described from the early Miocene lacustrine Bannockburn Formation of Central Otago, New Zealand, consist of several thousand otoliths and one skeleton plus another disintegrated skull. One species, Mataichthys bictenatus Schwarzhans, Scofield, Tennyson, and T. Worthy gen. et sp. nov., an eleotrid, is established on a skeleton with otoliths in situ. The soft embedding rock and delicate, three-dimensionally preserved fish bones were studied by CT-scanning technology rather than physical preparation, except where needed to extract the otolith. Fourteen species of fishes are described, 12 new to science and two in open nomenclature, representing the families Galaxiidae (Galaxias angustiventris, G. bobmcdowalli, G. brevicauda, G. papilionis, G. parvirostris, G. tabidus), Retropinnidae (Prototroctes modestus, P. vertex), and Eleotridae (Mataichthys bictenatus, M. procerus, M. rhinoceros, M. taurinus). These findings prove that most of the current endemic New Zealand/southern Australia freshwater fish fauna was firmly established in New Zealand as early as 1916 Ma ago. Most fish species indicate the presence of large fishes, in some cases larger than Recent species of related taxa, for instance in the eleotrid genus Mataichthys when compared to the extant Gobiomorphus. The finding of a few otoliths from marine fishes corroborates the age determination of the Bannockburn Formation as the Altonian stage of the New Zealand marine Tertiary stratigraphy.

    Original languageEnglish
    Pages (from-to)319-350
    Number of pages32
    JournalActa Palaeontologica Polonica
    Volume57
    Issue number2
    DOIs
    Publication statusPublished - Jun 2012

    Keywords

    • Eleotridae
    • freshwater
    • Galaxiidae
    • Mataichthys
    • Miocene
    • New Zealand
    • otoliths
    • Pisces
    • Retropinnidae

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