[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlentera
       Phylum Nematophora Huxley, 1850
         Class Ctenophora Eschscholtz, 1829 see Phylum Ctenophora Eschscholtz, 1829
           Order Saccata
             1 Genus Pleurobrachia Fleming, 1822
             2 Genus Callianira Péron & Lesueur, 1810