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A Late Devonian (Frasnian) bryozoan fauna from central Iran

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Abstract

A bryozoan fauna from the Late Devonian (Frasnian) of the Bahram Formation of the Zefreh section in central Iran contains four species: three trepostomes and one rhabdomesine cryptostome. Two species are new: the trepostome Coeloclemis zefrehensis sp. nov. and the rhabdomesine cryptostome Euthyrhombopora tenuis sp. nov. The trepostome species Cyphotrypa definita Morozova, 1960 and Anomalotoechus ramosus Morozova, 1960 were recorded previously from the Upper Devonian (Frasnian) of the Kuznets Basin. The genera Coeloclemis and Euthyrhombo-pora are recorded from the Devonian for the first time. The fauna is dominated by the erect ramose Euthyrhombopora tenuis sp. nov., with rare occurrences of the massive Cyphotrypa definita Morozova, 1960. The bryozoans indicate low to moderate water energy environment of middle to outer ramp position.

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Acknowledgements

Andrej Ernst thanks the Deutsche Forschungsge-meinschaft (DFG) for financial support (project ER 278/6.1). Peter Königshof acknowledges the funding by the Deutsche Forschungsgemeinschaft (DFG Project KO-1622/16-1). Jana Anger (Senckenberg) is thanked for preparing the thin sections. Ali Bahrami thanks the University of Isfahan, Iran, for financial and logistic supports. This is a contribution to IGCP 596 (Climate change and biodiversity patterns in the Mid-Palaeozoic – Early Devonian to Early Carboniferous). We thank the reviewers Patrick N. Wyse Jackson and Catherine Reid for valuable comments.

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Authors and Affiliations

  1. Institut für Geologie, Universität Hamburg, 20146, Hamburg, Germany

    Andrej Ernst

  2. Senckenberg – Forschungsinstitut und Naturmuseum Frankfurt, Senckenberganlage 25, 60325, Frankfurt am Main, Germany

    Peter Königshof

  3. Department of Geology, Faculty of Science, University of Isfahan, Isfahan, 81764, Iran

    Ali Bahrami & Mehdi Yazdi

  4. Geological Institute, Bulgarian Academy of Sciences, 113, Sofia, Bulgaria

    Iliana Boncheva

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  1. Andrej Ernst
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Correspondence to Andrej Ernst.

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This article is a contribution to the special issue “Climate change and biodiversity patterns in the mid-Palaeozoic”

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Ernst, A., Königshof, P., Bahrami, A. et al. A Late Devonian (Frasnian) bryozoan fauna from central Iran. Palaeobio Palaeoenv 97, 541–552 (2017). https://doi.org/10.1007/s12549-016-0269-5

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