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A new species of the sauropterygian genus Nothosaurus from the Lower Muschelkalk of Winterswijk, The Netherlands

Published online by Cambridge University Press:  14 July 2015

Paul C. H. Albers  and
Olivier Rieppel
Paul C. H. Albers
Affiliation:
Dikbosstaat 56, 7814 XP Weerdinge, The Netherlands,
Olivier Rieppel
Affiliation:
Department of Geology, The Field Museum, 1400 S. Lake Shore Drive, Chicago, Illinois 60605-2496,
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Abstract

A new species of the genus Nothosaurus from the Lower Muschelkalk of Winterswijk, The Netherlands, shows relatively plesiomorphic features such as a relatively forward position of the pineal foramen. The jugal enters into the ventral margin of the orbit, which would also be regarded as plesiomorphic, were it not that this feature optimizes unequivocally as a reversal and, hence, as a diagnostic (derived) character of the new taxon. The new taxon does not, however, increase the fit of the cladogram for the phylogenetic relationships within Nothosaurus to the stratigraphic record of the genus. The basal position of Nothosaurus juvenilis remains problematic.

Type
Research Article
Information
Journal of Paleontology , Volume 77 , Issue 4 , July 2003 , pp. 738 - 744
Copyright
Copyright © The Paleontological Society

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