Desmoceratidae is a family belonging to the ammonite superfamily Desmoceratoidea. They are an extinct group of ammonoids, shelled cephalopods related to squid, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids, that lived between the Lower Cretaceous (Upper Valanginian) and Upper Cretaceous (Upper Maastrichtian). References External links Desmoceratidae on Ammonites et autres fossiles - Cyril Baudouin Desmoceratidae on Laboratoire du Groupe de Recherche en Paléobiologie et Biostratigaphie des Ammonites; Ammonites du Jurassique et du Crétacé Ammonitida families Desmoceratoidea Valanginian first appearances Maastrichtian extinctions