First record of Phylloptychoceras (Ammonoidea) from the Maastrichtian type area, The Netherlands

To date, the two highest units (Nekum and Meerssen members) of the Maastricht Formation in the Maastrichtian type area (southeast Netherlands, northeast Belgium) have yielded some twenty ammonite species, the majority of which are heteromorph. Baculitids and scaphitids predominate, while diplomoceratines and nostoceratids are extremely rare and do not appear to range higher than the basal portion (subunit IVf-1) of the Meerssen Member. From subunits IVf-5 and IVf-6 of that unit as exposed at the quarries of ENCI-Heidelberg Cement Group (Maastricht) and Ankerpoort-Curfs (Geulhem), two specimens... Mehr ...