The ammonite fauna (lower cretaceous) of the glauconitic level of the Trois-Vernes quarry, near crest (Drome, South-eastern France) / The ammonite fauna (lower cretaceous) of the glauconitic level of the trois-vernes quarry, near crest (Drome, South-easte

During his exploitation, the Trois-Vernes quarry situated near Divajeu (Drôme, S-E. France) has revealed a glauconitic level containing a rich ammonite fauna from Lower Aptian. This fauna is described in this paper, it shows the quantitative prevalence of genera Macroscaphites (MEEK, 1832) (= Costidiscus UHLIG, 1883) and Procheloniceras SPATH, 1923. A new genus, Hohenegerriceras gen. nov. (type-species : Crioceras fallauxi UHLIG, 1883), and a new species, « Toxoceratoides » dietrichi sp. nov., are described. <...>