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 Buliminoidea Jones, 1875 see Order Buliminida Saidova, 1981
                       Family Islandiellidae see Family Cassidulinidae d'Orbigny, 1839
                         01 Genus Islandiella Nørvang, 1958
                         02 Genus Cassidulinoides Cushman, 1927
                         03 Genus Reissia Loeblich & Tappan, 1964
                         04 Genus Planocassidulina Gudina, 1966 see Genus Islandiella Nørvang, 1958
                         05 Genus Orthoplecta Brady, 1884
                         06 Genus Discoislandiella Saidova, 1975 see Genus Islandiella Nørvang, 1958
                         07 Genus Spiniferella Saidova, 1975 see Genus Globocassidulina Voloshinova, 1960
                         08 Genus Favocassidulina Loeblich & Tappan, 1957
                         09 Genus Rosaella Saidova, 1975 see Genus Islandiella Nørvang, 1958
                         10 Genus Sphaeroislandiella Saidova, 1975 see Genus Globocassidulina Voloshinova, 1960