A ceratopsian horncore from the Olmos Formation (early Maastrichtian) near Múzquiz, Mexico

Héctor Gerardo Porras-Múzquiz, Thomas M. Lehman

Abstract


An isolated supraorbital horncore collected from the Olmos Formation near Múzquiz is among the longest ever found, and records the presence in this area of a very large ceratopsid. The specimen probably pertains to a chasmosaurine, but differs significantly from the horncores in Coahuilaceratops known from the nearby Cerro del Pueblo Formation, and cannot be attributed with confidence to any other known ceratopsid.

Keywords


ceratopsian; Cretaceous; Olmos Formation; Mexico

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