- Received 21 December 2016.
- Revision received 3 February 2017.
- Accepted 11 February 2017.
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©The Authors Gold Open Access: This paper is published under the terms of the CC-BY license.
- 1Natural History Museum Luxembourg, Department of Palaeontology, 24 rue Münster, Luxembourg 2160, Luxembourg
- 2Muschelkalkmuseum Ingelfingen, Schlossstrasse 11, 74653 Ingelfingen, Germany
- 3School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Building, Burnaby Road, Portsmouth PO1 3QL, Great Britain