foraminifera d'Orbigny, 1826 see Class Foraminifera d'Orbigny, 1826
   Suborder †Fusulinina Wedekind, 1937 see Order Fusulinida Fursenko, 1958
     Superfamily †Fusulinoidea von Möller, 1878 see Order Fusulinida Fursenko, 1958
       Family †Ozawainellidae Thompson & Foster, 1937
         1 Genus †Eostafella Rauzer-Chernousova, 1948 see Genus Eostaffella Rauser-Chernousova, 1948
         2 Genus †Millerella Thompson, 1942
         3 Genus †Neostaffella Miklukho-Maklay, 1959
         4 Genus †Ozawainella Thompson, 1935
         5 Genus †Pseudoendothyra Mikhailov, 1939