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1 September 2004 DESCRIPTION OF PRENOCERATOPS PIEGANENSIS GEN. ET SP. NOV. (DINOSAURIA: NEOCERATOPSIA) FROM THE TWO MEDICINE FORMATION OF MONTANA
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Abstract

A new basal neoceratopsian genus and species, Prenoceratops pieganensis, is described from the Two Medicine Formation of Montana. This material represents the only bone-bed deposition of a basal neoceratopsian currently known, and in addition is almost entirely disarticulated allowing for a more thorough understanding of basal neoceratopsian cranial morphology. The new taxon is characterized by a lower, more sloping head than in Leptoceratops, with a nasal that is pinched caudally, a wide, triangular jugal, extremely gracile surangular, and reduced articular among other autapomorphies. A preliminary cladistic analysis unites Prenoceratops firmly with the other North American basal neoceratopsians (and one Asian taxon) in the clade Leptoceratopsidae.

BRENDA CHINNERY "DESCRIPTION OF PRENOCERATOPS PIEGANENSIS GEN. ET SP. NOV. (DINOSAURIA: NEOCERATOPSIA) FROM THE TWO MEDICINE FORMATION OF MONTANA," Journal of Vertebrate Paleontology 24(3), 572-590, (1 September 2004). https://doi.org/10.1671/0272-4634(2004)024[0572:DOPPGE]2.0.CO;2
Received: 30 January 2003; Accepted: 24 September 2003; Published: 1 September 2004
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