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Revision of Cretorectolobus (Neoselachii) and description of Cederstroemia n. gen., a Cretaceous carpet shark (Orectolobiformes) with a cutting dentition

Published online by Cambridge University Press:  20 May 2016

Mikael Siverson
Mikael Siverson*
Affiliation:
Department of Historical Geology and Palaeontology, Lund University, Sölvegatan 13, S-223 62 Lund, Sweden
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Abstract

The nominal Eucrossorhinus microcuspidatus and Cretorectolobus olsoni from the Campanian Judith River Formation of Montana, correspond to teeth from juvenile and adult individuals of one single species of orectoloboid shark. The type series of the latter is heterogeneous and includes, besides the holotype, a tooth belonging to a different orectoloboid of a new generic type named Cederstroemia. This genus is unique among Orectolobiformes by comprising sharks with dental adaptations towards a strict cutting dentition. Two new species of Cederstroemia are described: C. triangulata from the Judith River Formation of Montana and C. nilsi from the early Campanian of the Kristianstad Basin, Skåne, Sweden. An emended diagnosis is provided for Cretorectolobus, clarifying the dental characteristics of its members.

Type
Research Article
Information
Journal of Paleontology , Volume 69 , Issue 5 , September 1995 , pp. 974 - 979
Copyright
Copyright © The Paleontological Society 

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