A NEW BASAL CENTROSAURINE CERATOPSID FROM THE OLDMAN FORMATION, SOUTHEASTERN ALBERTA

MICHAEL J. RYAN

doi:10.1666/0022-3360(2007)81[376:ANBCCF]2.0.CO;2

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1 March 2007 A NEW BASAL CENTROSAURINE CERATOPSID FROM THE OLDMAN FORMATION, SOUTHEASTERN ALBERTA

MICHAEL J. RYAN

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J. of Paleontology, 81(2):376-396 (2007). https://doi.org/10.1666/0022-3360(2007)81[376:ANBCCF]2.0.CO;2

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.

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MICHAEL J. RYAN "A NEW BASAL CENTROSAURINE CERATOPSID FROM THE OLDMAN FORMATION, SOUTHEASTERN ALBERTA," Journal of Paleontology 81(2), 376-396, (1 March 2007). https://doi.org/10.1666/0022-3360(2007)81[376:ANBCCF]2.0.CO;2

Accepted: 1 October 2005; Published: 1 March 2007

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