New caprinid rudist genera Guzzella and Muellerriedia (Bivalvia-Hippuritacea) from the Albian (Cretaceous) of central Mexico

Abstract

Two new rudist genera Guzzyella and Muellerriedia of the family Caprinidae, are described from the rich fossiliferous locality of El Madroño, in the State of Querétaro, central Mexico. Although both genera share several morphological features, they differ markedly in the left valve posterior myophore… in order to continue, download the full paper in PDF.