†Hildoceras apertum Gabilly 1976 (ammonite)
Cephalopoda - Ammonitida - Hildoceratidae
Belongs to Hildoceras according to A. Galácz et al. 2010
Sister taxa: Hildoceras ameuri, Hildoceras angustisiphonatum, Hildoceras bastiani, Hildoceras bifrons, Hildoceras caterinii, Hildoceras crassum, Hildoceras lusitanicum, Hildoceras semipolitum, Hildoceras sublevisoni, Hildoceras tethysi
Ecology: fast-moving nektonic carnivore