Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               "protists" incertae sedis
                 Group †Acritarcha Evitt, 1963, incertae sedis [polyphyletic] - acritarchs
                   Genus †Buedingiisphaeridium Schaarschmidt, 1963 emend. Lister, 1970 emend. Sarjeant & Stancliffe, 1994
                     †Buedingiisphaeridium crassum G.L. Mullins (2004)
                     †Buedingiisphaeridium permicumᵀ Schaarschmidt (1963)
                     †Buedingiisphaeridium pyramidale Lister (1970)