Cephalopoda - Ammonoidea - Nostoceratidae

Full reference: O. Haas. 1943. Some abnormally coiled ammonites from the Upper Cretaceous of Angola. American Museum Novitates 1222:1-17

Belongs to Nostoceras according to O. Haas 1943

Sister taxa: Nostoceras (Nostoceras), Nostoceras alternatus, Nostoceras approximans, Nostoceras arkanasanum, Nostoceras colubriformis, Nostoceras danei, Nostoceras draconis, Nostoceras helicinus, Nostoceras hyatti, Nostoceras kernense, Nostoceras mendryki, Nostoceras monotuberculatum, Nostoceras obtusum, Nostoceras pauper, Nostoceras pleurocostatum, Nostoceras pulcher, Nostoceras rotundum, Nostoceras saundersorum, Nostoceras splendidus, Nostoceras stantoni

Type specimen: AMNH 25463, a shell. Its type locality is S-3, Maria Theresa [Teba Fm], which is in a Turonian/Santonian marine horizon in the Teba Formation of Angola.

Ecology: fast-moving nektonic carnivore