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 Miliolata Saidova, 1981 - porcelaneous foraminifers
                                         Subclass Miliamminana Mikhalevich, 1980
                                           Order Lituolida Lankester, 1885
                                             Superfamily Biokovinoidea Gusic, 1977
                                               Family Spirocyclinidae Munier-Chalmas, 1887
                                                 1 Genus †Martiguesia Maync, 1959
                                                 2 Genus †Pseudospirocyclina Hottinger, 1967
                                                 3 Genus †Qataria Henson, 1948
                                                 4 Genus †Reissella Hamaoui, 1963
                                                 5 Genus †Saudia Henson, 1948
                                                 6 Genus †Sournayina Marie, 1960
                                                 7 Genus †Streptocyclammina Hottinger, 1967
                                                 8 Genus Spirocyclinaᵀ Munier-Chalmas, 1887