Abstract

PORRAS-MUZQUIZ, Hector Gerardo  and  LEHMAN, Thomas M. A ceratopsian horncore from the Olmos Formation (early Maastrichtian) near Múzquiz, Mexico. Rev. mex. cienc. geol [online]. 2011, vol.28, n.2, pp.262-266. ISSN 2007-2902.

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.