On the co-occurrence of Rubroceras and Vascoceras (Ammonoidea, Vascoceratidae) in the upper Cenomanian of the West Portuguese Carbonate Platform

In addition to New Mexico and West Portugal, representatives of Rubroceras are presently known from other carbonate platforms of North Africa, Arabian Peninsula and Nigeria, where they have been found in ammonite assemblages correlative to the Neocardioceras juddii standard zone. They are apparently absent from the remaining basins of the Iberian microplate with abundance of Vascoceratidae representatives, namely the Iberian Through (Spain), whose late Cenomanian oceanic communication was more processed from the North. Further studies will provide a better understanding of this important biotic dispersal event across the Tethyan Realm, as an additional marker of uppermost Cenomanian ammonite assemblages.