Phylum Mollusca Linnaeus, 1758 - molluscs Class Cephalopoda Cuvier, 1795 - cephalopods Subclass Coleoida Bather, 1888 see Subclass Coleoidea Bather, 1888 Order Sepiida Gray, 1849 Suborder Spirulina Pompeckj, 1912 [monotypic] 1 Family Spirulidae Rafinesque, 1815 [monotypic]