Kingdom Animalia Linnaeus, 1758 - animals Phylum Cnidaria Hatschek, 1888 - cnidarians 1 Class †Archaeohydroidea 2 Class †Petalonamae Pflug, 1970 see Phylum Vendobionta Seilacher, 1992 3 Class †Cyclozoa Fedonkin, 1983 4 Class †Hydroconozoa Kordeh, 1963 5 Class Polypodiozoa E.V. Raikova, 1994 6 Class Hydrozoa Owen, 1843 7 Class Scyphozoa Goette, 1887 - jellyfish