ABSTRACT. An important new ammonite fauna was collected by Fu Èlo Èp in 1953 and 1960 from basal lenses between a Tithonian hardground and the overlying Tata Limestone Formation containing many heteromorph ammonites. This assemblage of ammonites has been determined as being of Early Albian (tardefurcata Zone) age. Among the heteromorphs are species of Tonohamites and Ptychoceras, which are familiar components of Late Aptian or Early Albian ammonite faunas. The genera Ephamulina, Hamites and Protanisoceras are also recorded, the earliest species of which had previously come from sediments of late Early Albian (mammillatum Zone) age. While Hamites and Protanisoceras are common in Europe, Ephamulina had previously only been known from Madagascar. The discovery of Ephamulina, Hamites and Protanisoceras supports the view that these phylogenetically signi®cant ammonites had radiated close to the Aptian/Albian boundary. Four new species of Hamites (H. czaszari, H. fazekasensis, H. fueloepi and H. kalvariensis) and one new species of Tonohamites (T. boldii ) are described.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.