[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 †Petalospyris Ehrenberg, 1847
         1 †Petalospyris diaboliscus Ehrenberg, 1847
         2 †Petalospyris foveolata Ehrenberg, 1854
         3 †Petalospyris pentas Ehrenberg, 1873