Kingdom Protista (Haeckel, 1866) - protists
   Phylum Sarcomastigophora Honigberg & Balamuth, 1963
     Subphylum Sarcodina - amebas
       Superclass Rhizopoda - rhizopodans see Phylum Rhizopoda Dujardin, 1835
         Class Granuloreticulosea - reticulose amebas see Phylum Foraminifera d'Orbigny, 1826
           Order Foraminiferida d'Orbigny, 1826 - foraminiferans see Class Foraminifera d'Orbigny, 1826
             Genus Cyclorbiculina Silvestri, 1937
             Genus Elphidium Montfort, 1808
             Genus Fusilina see Genus Fusulina Fischer, 1829
             Genus Iridia Heron-Allen & Earland, 1914
             Genus Rotaliella Grell, 1954
             Genus Tinoporus Montfort, 1808, nom. rej. see Genus Calcarina d'Orbigny, 1826
             Genus Tretomphalus Möbius, 1880