[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Crustacea (Brünnich, 1772) - crustaceans see Superclass Crustacea Pennant, 1777
     Subclass Cirripedia Lamarck - barnacles and their kin see Infraclass Cirripedia Burmeister, 1834
       Superorder Rhizocephala Müller, 1862
         Order Akentrogonida Häfele, 1911
           1 Family Chthamalophilidae J. Bocquet-Védrine, 1961
           2 Family Clistosaccidae Boschma, 1928
           3 Family Duplorbidae J.T. Høeg & A.V. Rybakov, 1992
           4 Genus Polysaccus Ho & Lützen, 1993