[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Theoperidae Haeckel, 1881
       Genus †Theocotyle Riedel & Sanfilippo, 1970
         1 †Theocotyle conica Foreman, 1973
         2 †Theocotyle cryptocephala (Ehrenberg, 1873)
         3 †Theocotyle nigriniae Riedel & Sanfilippo, 1970
         4 †Theocotyle venezuelensis Riedel & Sanfilippo, 1970