January 20 , 2017:

During the past decade, three new endemic taxa of ceratopsian ornithischians have been described from Mexico. Apparently, this group experienced a regional diversification in this area. To date Mexican Ceratopsia are represented by three species, one of which is a centrosaurine and two are chasmosaurines. Here we provide a critical review on Mexican ceratopsians and formally name a new centrosaurine ceratopsid species from the Aguja Formation as Yehuecauhceratops mudei. We also discuss possible causes for the rapid endemic diversification of Mexican ceratopsians.

Héctor E. Rivera-Sylva, Eberhard Frey, Wolfgang Stinnesbeck, José Rubén Guzmán-Gutiérrez & Arturo H. González-González (2017)
Mexican ceratopsids: Considerations on their diversity and evolution.
Journal of South American Earth Sciences (advance online publication)
http://dx.doi.org/10.1016/j.jsames.2017.01.008