La faune danienne de Vigny (Val-d’Oise, France) : importance pour l’étude de la diversificationdes mollusques au début du Tertiaire

The Danian fauna of mollusca from Vigny increases from 55 to 171 species distributed in 130 genera. Extended stratigraphic ranges are given for 22 genera. The Cenozoic character of the fauna relies on the 57 exclusively Tertiary genera as opposed to only 9 genera of Maastrichtian and Danian distribution, and by a species assemblage closely similar to that of the Belgian Middle Danian.