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
                                     Class Nodosariata Mikhalevich, 1992, incertae sedis
                                       Subclass Nodosarianaᵀ Mikhalevich, 1992
                                         Order Vaginulinida Mikhalevich, 1993
                                           Family Vaginulinidaeᵀ Reuss, 1860
                                             1 Genus †Citharina d'Orbigny, 1839
                                             2 Genus †Citharinella Marie, 1938
                                             3 Genus †Flabellinella Schubert, 1900
                                             4 Genus †Psilocitharella Loeblich & Tappan, 1986
                                             5 Genus †Saracenella Franke, 1936
                                             6 Genus †Tentifrons Loeblich & Tappan, 1957
                                             7 Genus †Tentilenticulina Hitchings, 1980
                                             8 Genus Planularia Defrance, 1824
                                             9 Genus Vaginulinaᵀ d'Orbigny, 1826