[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Plagiacanthidae Hertwig, 1879
       Genus †Spongomelissa Haeckel, 1887
         1 †Spongomelissa adunca Sanfilippo & Riedel, 1973
         2 †Spongomelissa cucumella Sanfilippo & Riedel, 1973
         3 †Spongomelissa dilli Chen, 1975