Phylum Mollusca Linnaeus, 1758 - molluscs Class Cephalopoda Cuvier, 1795 - cephalopods Subclass Coleoida Bather, 1888 see Subclass Coleoidea Bather, 1888 Order Octopoda Leach, 1817 - octopuses Suborder Cirrata Grimpe, 1917 see Suborder Cirrina Grimpe, 1916 1 Family Cirroteuthidae Keferstein, 1866 2 Family Opisthoteuthidae Verrill, 1896 [monotypic]