[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Coccodiscidae Haeckel, 1862
       Genus Didymocyrtis Haeckel, 1860
         01 †Didymocyrtis antepenultima (Riedel & Sanfilippo, 1970)
         02 †Didymocyrtis avita (Riedel, 1953)
         03 †Didymocyrtis bassanii (Carnevale, 1908)
         04 †Didymocyrtis didymus (Ehrenberg, 1844)
         05 †Didymocyrtis laticonus (Riedel, 1959)
         06 †Didymocyrtis mammifera (Haeckel, 1887)
         07 †Didymocyrtis penultima (Riedel, 1957)
         08 †Didymocyrtis prismatica (Haeckel, 1887)
         09 Didymocyrtis tetrathalamus (Haeckel, 1887)
         10 †Didymocyrtis tubaria (Haeckel, 1887)
         11 †Didymocyrtis violina (Haeckel, 1887)