[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   [metazoans] Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
     Phylum Cnidaria Hatschek, 1888 - cnidarians
       Class Hydrozoa Owen, 1843
         Order Siphonophorida Eschscholtz, 1829 see Order Siphonophora Eschscholtz, 1829
           1 Genus †Rotadiscus Sun & Hou, 1987, nom. illeg.
           2 Family Porpitidae Brandt, 1835
           3 Family †Scenellidae Miller, 1889