Late Campanian polyptychoceratine ammonites from the Lehrte West Syncline, Hannover area, northwest Germany

Two faunules of heteromorph ammonites (Polyptychoceratinae) are recorded from the vulgaris/stolleyi and minor/polyplocum zones (mid/upper Campanian) as exposed at the Teutonia Nord (Teutonia AG) quarry near Misburg (Lehrte West Syncline, Hannover area, northwest Germany). Four taxa are recognised: Oxybeloceras aff. crassum, Pseudoxybeloceras (Parasolenoceras) ?phaleratum, Solenoceras aff. texanum and Spiroxybeloceras? grande sp. nov. Species of Oxybeloceras, Solenoceras and Spiroxybeloceras are widely distributed in the upper Campanian of the Western Interior and the Atlantic Seaboard of the USA, where their stratigraphic ranges are well known. Comparison of the new northwest German records with these ranges suggests polyptychoceratines are less well suited for strict zone-level correlations than are co-occurring nostoceratid and scaphitid ammonites.