[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Actinommidae Haeckel, 1862
       Genus Thecosphaera Haeckel, 1881
         1 †Thecosphaera akitaensis Nakaseko, 1971
         2 Thecosphaera inermis (Haeckel, 1860)
         3 Thecosphaera japonica Nakaseko, 1971
         4 †Thecosphaera larnacium Sanfilippo & Riedel, 1973
         5 †Thecosphaera miocenica Nakaseko, 1955
         6 †Thecosphaera pseudojaponica Nakaseko, 1971
         7 Thecosphaera radians Hollande, 1960
         8 †Thecosphaera sanfilippoae Blueford, 1982