abstract: Barremian-lower Aptian requieniid rudists from the Southern Carpathians and the Apuseni Mountains, in Romania, are represented by four new species of the genus Matheronia Munier-Chalmas: Matheronia dacica, Matheronia nerae, Matheronia carinata and Matheronia silvaeregis.In the study stratigraphic interval these species possess a potential biostratigraphic value.Their evolution trough time is essentially characterized by shell size increase.Matheronia looks restricted to the North Mediterranean T
journal: Acta Palaeontologica Romaniae