Yehuecauhceratops

Yehuecauhceratops (meaning "ancient horned face") is a genus of horned centrosaurine ceratopsid dinosaur from the Late Cretaceous of Coahuila, Mexico. It contains a single species, Y. mudei, described from two partial specimens by Rivera-Sylva et al. in 2016 and formally named by Rivera-Sylva et al. in 2017. It was a small centrosaurine with a body length of , making it smaller than Agujaceratops and Coahuilaceratops, the other two ceratopsids in its environment; the three may have been ecologically segregated. A ridge bearing a single roughened projection near the bottom of the squamosal bone, which probably supported a small horn, allows Yehuecauhceratops to be distinguished from other centrosaurines. Its affinities to nasutoceratopsin centrosaurines, such as Avaceratops and Nasutoceratops, are supported by various morphological similarities to the former.

==Discovery and naming== left|thumb|Maps showing where specimens have been found Specimens of Yehuecauhceratops were recovered during excavations from 2007 to 2011 in a locality near the town of La Salada, in Ocampo, Coahuila, Mexico, about south of Big Bend National Park in Texas. The rocks exposed in this locality belong to the Campanian Aguja Formation, although its precise location within the temporal range of the formation is difficult to establish. Specimens attributed to Yehuecauhceratops are stored in the palaeontological collection of the Museo del Desierto.