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
                   [†Acanthomorphitae]
                   Family †Acanthomorphitidae
                   Genus †Buedingiisphaeridium Schaarschmidt, 1963 emend. Lister, 1970 emend. Sarjeant & Stancliffe, 1994
                   Genus †Carminella Cramer, 1968
                   Genus †Comasphaeridium Staplin, Jansonius & Pocock, 1965
                   Genus †Dateriocradus Tappan & Loeblich, 1972
                   Genus †Diexallophasis Loeblich, 1970
                   Genus †Dilatisphaera Lister, 1970
                   Genus †Dorsennidium Wicander, 1974
                   Genus †Eisenackidium Cramer & Díez, 1968 ex Eisenack, Cramer & Díez, 1973
                   Genus †Estiastra Eisenack, 1959
                   Genus †Eupoikilofusa Cramer, 1970
                   Genus †Gorgonisphaeridium Staplin, Jansonius & Pocock, 1965
                   Genus †Hapsidopalla Playford, 1977
                   Genus †Helosphaeridium Lister, 1970
                   †Herkomorphitae
                   Genus †Hoegklintia Dorning, 1981
                   [Genus †"Hystrichosphaeridium" Naumova (1968)]
                   Genus †Leiofusa Eisenack, 1938
                   [Family †"Leiofusidae" Eisenack, 1938]
                   Genus †Leoniella
                   Genus †Leptobrachion Dorning, 1981
                   Genus †Lophosphaeridium Timofeev, 1959
                   Genus †Micrhystridium Deflandre, 1937
                   Genus †Multiplicisphaeridium Staplin, 1961
                   Genus †Neoveryhachium Cramer, 1970
                   Genus †Onondagella Cramer, 1966
                   Genus †Oppilatala Loeblich & Wicander, 1976
                   [Genus †"Ovum" Eisenack (1931)]
                   Genus †Ozotobrachion Loeblich & Drugg, 1968
                   Genus †Percultisphaera Lister, 1970
                   Subgroup †Polygonomorphitae Downie et al., 1963
                   Genus †Psenotopus Tappan & Loeblich Jr., 1971
                   Genus †Pseudofromea Burger (1980)
                   †Pteromorphitae
                   Genus †Pulvinosphaeridium Eisenack, 1954
                   Genus †Salopidium Dorning, 1981
                   Genus †Schismatosphaeridium Staplin, Jansonius & Pocock, 1965
                   Genus †Tunisphaeridium J. Deunff & W.R. Evitt, 1968
                   Genus †Tylotopalla Loeblich, 1970
                   Genus †Veryhachium J. Deunff, 1954
                   Genus †Visbysphaera Lister, 1970
                   1 Genus †Ammonidium Lister, 1970
                   1 Genus †Baltisphaeridium Eisenack, 1958 ex Eisenack, 1959
                   2 Genus †Peteinosphaeridium Staplin et al.
                   3 Genus †Cymbosphaeridium Lister, 1970