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
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Chromista Caval.-Sm. (1981) - chromists
                           Subkingdom Harosa Cavalier-Smith, 2010
                             [crown] Clade Sar Adl et al. 2012 [Simpson & Dunthorn 2020]
                               Infrakingdom Rhizaria Cavalier-Smith, 2002
                                 Phylum Retaria Cavalier-Smith, 2002
                                   Subphylum Foraminifera d'Orbigny, 1826
                                     Tubothalamea Pawlowski, Holzmann & Tyszka, 2013
                                       Class Spirillinata Mikhalevich, 1992
                                         Subclass Ammodiscana Mikhalevich, 1980
                                           Order Ammodiscidaᵀ Mikhalevich, 1980
                                             Family Ammodiscidaeᵀ Reuss, 1862
                                               Subfamily Ammodiscinaeᵀ Reuss, 1862
                                                 1 Genus †Hemidiscus Schellwien, 1898
                                                 2 Genus †Bifurcammina Ireland, 1939
                                                 3 Genus †Spirosolenites Glaessner, 1979
                                                 4 Genus †Rectoammodiscus Reitlinger, 1993
                                                 5 Genus Ammodiscusᵀ Reuss, 1862
                                                 6 Genus Ammodiscoides Cushman, 1909
                                                 7 Genus Spirillinoides Rhumbler, 1938
                                                 8 Genus Arenoturrispirillina Tairov, 1956
                                                 x Genus †Agathamminoides Vangerow, 1964