Abstract

Fossil upper and lower squaliform shark teeth from the upper Austrian marine Molasse (Paratethys, Upper Egerian, Aquitanian) were collected. For testing the phylogenetic signal of 31 reviewed dental characters of both fossil and extant etmopterids and somniosids, we performed phylogenetic analyses using both parsimony and maximum likelihood approaches. The results indicated a close phylogenetic relationship of teeth collected for this study with the extant somniosid genus Centroscymnus. A number of preliminary or un-identified fossil teeth published in other studies were included in our analyses and clustered along with the fossils described herein, suggesting a synonym. Our results further allow for a revision of the type species of Paraetmopterus horvathi Underwood and Schlogl, 2013 and the description of Palaeocentroscymnus gen. nov.

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