[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Theoperidae Haeckel, 1881
       Genus Calocyclas Ehrenberg, 1847
         1 †Calocyclas bandyca (Mato & Theyer, 1980)
         2 †Calocyclas disparidens Chen, 1975
         3 †Calocyclas extensa Clark, 1942
         4 †Calocyclas fragilis (Carnevale, 1908)
         5 †Calocyclas hispida (Ehrenberg, 1873)
         6 Calocyclas monumentum Haeckel, 1887
         7 †Calocyclas talwanii Bjørklund, 1972
         8 †Calocyclas turris Ehrenberg, 1873
         9 †Calocyclas? nakasekoi Takemura & Ling, 1998