A Late Oligocene (Chattian B) molluscan fauna from the coastal cliff at Mogenstrup, North of Skive, Jutland, Denmark

A very rich Late Oligocene molluscan fauna from a coastal cliff at Mogenstrup, North of Skive, Jutland, Denmark, was studied. A summary of the Late Palaeogene sedimentary sequence in NW Jutland is given, the locality and the section exposed are described. Lithostratigraphical, magnetostratigraphical and biostratigraphical correlations are suggested. A list of the molluscan species is given, comparisons with other Danish and German Late Oligocene localities are made, and palaeoecological interpretations are suggested. In the systematic part the subgenus Andersondrillia subgen. nov. is introduced within the genus Microdrillia. Several taxa are discussed and the following new species and subspecies are described: Limopsis (Pectunculina) lamellata chattica subsp. nov., Limopsis (Pectunculina) vonderhochti sp. nov., Collonia (Collonia) troelsi sp. nov., Lepetella helgae sp. nov., Lepetella jytteae sp. nov., Tubiola subangulata sp. nov., Cerithiopsis (s. lat.) antonjansei sp. nov., Laiocochlis (Laiocochlis) supraoligocaenica sp. nov., Triforis (Trituba) sorgenfreii sp. nov., Cirsotrema (Opaliopsis) subglabrum sp. nov., Searlesia ravni sp. nov., Angistoma brueckneri danica subsp. nov., Clavatula mogenstrupensis sp. nov., Microdrillia (Microdrillia) ingerae sp. nov., Microdrillia (Andersondrillia) brejningensis sp. nov., Pleurotomella (Pleurotomella) rasmusseni sp. nov., Rimosodaphnella lappanni sp. nov. and ? Actaeopyramis (s. lat.) pseudopunctata sp. nov.