Kingdom [Animalia] Linnaeus, 1758 - animals Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758 Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910 Subdivision Bilateralia Phylum Pentacoela Subphylum Branchiotremata ?Genus Planctosphaera Spengel, 1932 ?Genus Xenoturbella E. Westblad, 1949 1 Class Enteropneusta Gegenbaur, 1870 - tongue worms 2 Class Pterobranchia Lankester, 1877 - pterobranchs