[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Trissocyclidae Haeckel, 1881 see Family Acanthodesmiidae Haeckel, 1862
       Genus Phormospyris Haeckel, 1881
         1 †Phormospyris thespios Goll & Bjørklund, 1989
         2 Phormospyris tricostata Haeckel, 1887