living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryotae see Domain Eukaryota Chatton, 1925
     Animalia Linnaeus, 1758 - animals
       Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Mollusca Linnaeus, 1758 - molluscs
           Cephalopoda Cuvier, 1795 - cephalopods
             Coleoidea Bather, 1888
               Teuthoidea see Order Teuthida Naef, 1916
                 Oegopsida d'Orbigny, 1845 see Suborder Oegopsina Orbigny, 1845
                   Cycloteuthidae Naef, 1923
                     Cycloteuthis Joubin, 1919