Latest Maastrichtian pachydiscid ammonites from The Netherlands and Poland

The pachydiscid ammonite Menuites terminus (WARD & KENNEDY, 1993) is described from the uppermost Maastrichtian deposits in the type area of the Maastrichtian Stage in southeast Netherlands (upper part of the Meerssen Member of the Maastricht Formation) and in central Poland (upper part of the Kazimierz Opoka). Variation in whorl section and ribbing in the material studied is documented. The presence of M. terminus places the upper parts of the Meerssen Member and of the Kazimierz Opoka in the highest Maastrichtian ammonite zone, the M. terminus Zone, defined originally in the Bay of Bisca... Mehr ...