organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     amoeboid protists
       Class Phaeodarea Haeckel, 1879 see Subclass Phaeodaria Haeckel, 1879
         Order Phaeocalpida Haeckel, 1887
           Family Castanellidae Haeckel, 1887
             1 Genus Castanella Haeckel, 1879, nom. nud.
             2 Genus Castanissa Haeckel, 1879, nom. nud.
             3 Genus Castanea Haecker, 1906