Class [Cephalopoda] Cuvier, 1795 - cephalopods Subclass †Ammonoidea Zittel, 1884 Order †Ammonitida Hyatt, 1889 1 Suborder †Psilocerina 2 Suborder †Haplocerina 3 Suborder †Stephanocerina 4 Suborder †Cardiocerina 5 Suborder †Ancylocerina