metazoans Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758 Bilateria Hatschek, 1888 - bilaterians see Subkingdom Bilateria Hatschek, 1888 Class †Dipleurozoa Harrington & Moore, 1956, incertae sedis 1 Family †Dickinsonidae nom. null. see Family Dickinsoniidae Harrington & Moore, 1955