[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Coccodiscidae Haeckel, 1862
       Genus †Phacostaurus Haeckel, 1881
         1 †Phacostaurus (?) quadratus Nishimura, 1992