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A new basal centrosaurine ceratopsid from the Oldman Formation, southeastern Alberta

Published online by Cambridge University Press:  14 July 2015

Michael J. Ryan
Michael J. Ryan*
Affiliation:
Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada T2N 1N4
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Abstract

A new centrosaurine ceratopsid, Albertaceratops nesmoi, is described from the lower Oldman Formation (Upper Cretaceous) of southern Alberta, and is based on a single, almost complete skull. Referred material is described from equivalent beds in the Judith River Formation of north-central Montana. A limited phylogenetic analysis of the Ceratopsidae places the new taxon as the basal member of the Centrosaurinae and indicates that robust, elongate postorbital horncores that form a synapomorphy of (Ceratopsidae + Zuniceratops) are also present in Centrosaurinae.

Type
Research Article
Information
Journal of Paleontology , Volume 81 , Issue 2 , March 2007 , pp. 376 - 396
Copyright
Copyright © The Paleontological Society 

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