Cephalopoda - Ammonoidea - Nostoceratidae
Parent taxon: Nostoceratidae according to W. J. Kennedy et al. 2000
Sister taxa: Anaklinoceras, Ankinatsytes, Axonoceras, Bostrychoceras, Cirroceras, Didymoceras, Eubostrychoceras, Exiteloceras, Helicoceras, Jouaniceras
Subtaxa: Nostoceras (Nostoceras), Nostoceras alternatus, Nostoceras approximans, Nostoceras arkanasanum, Nostoceras colubriformis, Nostoceras danei, Nostoceras draconis, Nostoceras helicinus, Nostoceras hyatti, Nostoceras kernense, Nostoceras mariatheresianum, Nostoceras mendryki, Nostoceras monotuberculatum, Nostoceras obtusum, Nostoceras pauper, Nostoceras pleurocostatum, Nostoceras pulcher, Nostoceras rotundum, Nostoceras saundersorum, Nostoceras splendidus, Nostoceras stantoni
Ecology: fast-moving nektonic carnivore