[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryota Whittaker & Margulis, 1978 see Domain Eukaryota Chatton, 1925
     Kingdom Chromista Caval.-Sm. (1981) - chromists
       Subkingdom Harosa Cavalier-Smith, 2010
         Infrakingdom Rhizaria Cavalier-Smith, 2002
           Phylum Retaria Cavalier-Smith, 2002
             Subphylum Radiozoa Cavalier-Smith, 1987
               Superclass Spasmaria Cavalier-Smith, 1993
                 Class Acantharea Haeckel, 1881
                   Order Arthracanthida Schewiakoff, 1926