[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Pterocorythidae Haeckel, 1881 see Family Pterocoryidae Haeckel, 1881
       Genus †Theocyrtis Haeckel, 1887
         1 †Theocyrtis annosa (Riedel, 1959)
         2 †Theocyrtis diabloensis Clark, 1942
         3 †Theocyrtis litos (Clark & Campbell, 1945)
         4 †Theocyrtis robusta (Clark & Campbell, 1942)
         5 †Theocyrtis tuberosa Riedel, 1959