New data on Early Cretaceous (Hauterivian-Barremian) heteromorphic ammonites from northern Germany
Journal: Data Archiving and Networked Services (DANS)
Year: 2010

The stratigraphic ranges and systematics of heteromorphic ammonites from Lower Cretaceous (Hauterivian-Barremian) deposits in Lower Saxony, northern Germany, are revised. Nine genera and fortyseven species of the family Ancyloceratidae Gill, 1871, are described. One genus (Fissicostaticeras) and 20 species are new; Emericiceras ressense, E. sornayiforme, E. serpentinum, E. subtilicostatum, E. gotti, E. hannoverense, E. kemperi, Crioceratites hastensis, C. subisocostatus, C. vermiformis, Fissicos