living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
         Phylum Sarcomastigophora Honigberg & Balamuth, 1963
           Subphylum Sarcodina - amebas
             Superclass Rhizopoda - rhizopodans see Phylum Rhizopoda Dujardin, 1835
               Class Granuloreticulosa see Phylum Foraminifera d'Orbigny, 1826
                 Order Foraminiferida d'Orbigny, 1826 - foraminiferans see Class Foraminifera d'Orbigny, 1826
                   Suborder Rotaliina Delage & Herouard, 1896 see Order Rotaliida Lankester, 1885
                     Superfamily Rotalioidea Ehrenberg, 1839 see Order Rotaliida Lankester, 1885
                       Family Elphidiidae Galloway, 1933
                         01 Genus Elphidium Montfort, 1808
                         02 Genus Notorotalia Finlay, 1938
                         03 Genus Polystomellina Yabe & Hanzawa, 1923
                         04 Genus Elphidiella Cushman, 1936
                         05 Genus Haynesina Banner & Culver, 1978
                         06 Genus Perfectononion Voloshinova & Leonenko, 1970 see Genus Elphidium Montfort, 1808
                         07 Genus Elphidiononion Hofker, 1951 see Genus Cribroelphidium Cushman & Brönnimann, 1948
                         08 Genus Pseudoelphidiella Voloshinova & Kuznetsova, 1970 see Genus Elphidiella Cushman, 1936
                         09 Genus Porosononion Putrya, 1958 see Genus Cribroelphidium Cushman & Brönnimann, 1948
                         10 Genus Cribrononion Thalmann, 1946 see Genus Elphidium Montfort, 1808
                         11 Genus Parrellina Thalmann, 1951