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  • Conodont diversity across t...
    Suttner, Thomas J.; Kido, Erika; Corradini, Carlo; Vodrážková, Stanislava; Pondrelli, Monica; Simonetto, Luca

    Palaeogeography, palaeoclimatology, palaeoecology, 08/2017, Volume: 479
    Journal Article

    The polyphased Kačák Episode near the Eifelian-Givetian boundary (Middle Devonian), well documented globally, resembles other global biotic extinction events driven by climate change. High-resolution conodont biodiversity patterns from shallow marine, slope and pelagic bathymetric settings within the same basin from the Carnic Alps show that while conodonts experienced diversification during the latest Eifelian ensensis Biozone, assemblages suffered extinction during the early Givetian hemiansatus Biozone. Although a similar general pattern is observed in different bathymetric settings there is a changed taxonomic composition of conodont assemblages across the stage boundary. Based on microfacies analysis this change is contemporaneous with changes in palaeoenvironmental conditions in the earliest Givetian. Display omitted •The polyphased Kačák Episode is traced in different bathymetric settings of the same basin.•Conodont biodiversity significantly influenced by global Middle Devonian Kačák Episode.•Conodont biodiversity reaches a maximum shortly before the Eifelian-Givetian boundary.•Diversity-decline contemporaneous with facies change during the earliest Givetian.