Grade Metazoa - multicellular animals see Kingdom Animalia Linnaeus, 1758 Grade Eumetazoa - eumetazoans see [unranked] Eumetazoa Bütschli, 1910 Grade "Bilateria" - bilaterians see Subkingdom Bilateria Hatschek, 1888 Grade Pseudocoelomates Hyman, 1951