[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Theoperidae Haeckel, 1881
       Genus †Cyrtocapsella Haeckel, 1887
         1 †Cyrtocapsella ampullacea Goll & Bjørklund, 1989
         2 †Cyrtocapsella cornuta Haeckel, 1887
         3 †Cyrtocapsella eldholmi Bjørklund, 1976
         4 †Cyrtocapsella elongata (Nakaseko, 1963)
         5 †Cyrtocapsella japonica Tochilina, 1985
         6 †Cyrtocapsella kladaros Goll & Bjørklund, 1989
         7 †Cyrtocapsella tetrapera Haeckel, 1887