living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Arthropoda Siebold, 1848 - arthropods
           Subphylum Crustacea Brünnich, 1772 - crustaceans see Superclass Crustacea Pennant, 1777
             Subclass Cirripedia Lamarck - barnacles and their kin see Infraclass Cirripedia Burmeister, 1834
               Order Thoracica Darwin, 1854 - goose and acorn barnacles see Superorder Thoracica Darwin, 1854
                 Suborder Lepadomorpha Pilsbry, 1916
                   1 Family Scalpellidae Pilsbry, 1907
                   2 Family Heteralepadidae Nilsson-Cantell, 1921
                   3 Family Iblidae Leach, 1825
                   4 Family Koleolepadidae Hiro, 1933
                   5 Family Lepadidae Darwin, 1852
                   6 Family Malacolepadidae Hiro, 1937
                   7 Family Oxynaspididae Gruvel, 1905
                   8 Family Poecilasmatidae Annandale, 1909