Rhizaria Cavalier-Smith, 2002 see Infrakingdom Rhizaria Cavalier-Smith, 2002
   Foraminifera d'Orbigny, 1826 see Subphylum Foraminifera d'Orbigny, 1826
     Nodosariata Mikhalevich, 1992
       Nodosariana Mikhalevich, 1992
         Nodosariida Calkins, 1926
           Nodosariina Calkins, 1926
             Nodosarioidea Ehrenberg, 1838
               Frondiculariidae Reuss, 1860
                 Tristixinae Mikhalevich, 2013
                   1 Acostinella Sarkar & Gupta, 2008
                   2 Tristix MacFadyen, 1941
                   3 Tribrachia Schubert, 1912
                   4 Acostina Bermúdez, 1949