Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Subphylum Cyrtosoma Runnegar & Pojeta Jr., 1974 see Phylum Mollusca Linnaeus, 1758
       Class Cephalopoda Cuvier, 1795 - cephalopods
         Subclass †Actinoceratoidea Teichert et al., 1964
           Genus †Actinoceras Bronn, 1835
           Genus †Armenoceras Foerste, 1924
           Genus †Gonioceras Hall, 1847
           Genus †Huronia Stokes, 1824