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Fossil Record A palaeontological open-access journal of the Museum für Naturkunde

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Foss. Rec., 20, 159-172, 2017
https://doi.org/10.5194/fr-20-159-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
25 Apr 2017
Miocene sepiids (Cephalopoda, Coleoidea) from Australia
Martin Košt'ák1, Andrej Ruman2, Ján Schlögl2, Natalia Hudáčková2, Dirk Fuchs3, and Martin Mazuch1 1Institute of Geology and Palaeontology, Faculty of Science, Charles University in Prague, Albertov 6, Prague 2, 128 43, Czech Republic
2Department of Geology and Paleontology, Faculty of Natural Sciences, Comenius University, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
3Earth and Planetary System Science, Department of Natural History Sciences, Hokkaido University, Sapporo, Japan
Abstract. Two sepiid genera, Notosepia Chapman, 1915, and Sepia Linnaeus, 1758, are described from the Neogene deposits of Australia. A new and unique record of the middle Miocene Sepia sp. is reported from southern Australia. Based on similarities to contemporaneous sepiids, the new sepiid cuttlebone described herein belongs to the genus Sepia. Notosepia cliftonensis is suggested herein to be a descendant of the archaeosepiid stem lineage. Microstructures (lamella-fibrillar nacre is the nacre Type II of septa and pillar prismatic layers) of the excellently preserved cuttlebone of Sepia sp. display a modern character of the phragmocone, fully comparable to the recent taxa. The stratigraphically well-calibrated (based on foraminifera) cuttlebone represents the first unambiguous fossil record of the genus Sepia from the Southern Hemisphere. It significantly extends the biogeographical distribution of modern sepiids in the Miocene and suggests the existence of a sepiid eastward migratory route. Moreover, the presence of both conservative- and modern-type cuttlebones suggests a dual colonisation of Australian waters: the first (archaeosepiid) during the late Eocene–late Oligocene and the second (sepiid) during the early Miocene.

Citation: Košt'ák, M., Ruman, A., Schlögl, J., Hudáčková, N., Fuchs, D., and Mazuch, M.: Miocene sepiids (Cephalopoda, Coleoidea) from Australia, Foss. Rec., 20, 159-172, https://doi.org/10.5194/fr-20-159-2017, 2017.
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Short summary
The cephalopods Sepia (cuttlefish) from recent seas are well known, but what is their evolutionary history, when did they originate and how did they spread within the oceans? Based on a new sepiid record from Australia, we now recognize periods of sepiid migration, their evolution and distribution in time and space.
The cephalopods Sepia (cuttlefish) from recent seas are well known, but what is their...
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