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 Mesozoa van Beneden, 1876 see [unranked] Mesozoa van Beneden, 1876
           Class Orthonectida Giard, 1880
             Family Rhopaluridae H. Stunkard
               1 Genus Rhopalura Giard, 1877
               2 Genus Stoecharthrum Caullery & Mesnil, 1899