[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847
     Family Plagiacanthidae Hertwig, 1879
       Genus Pseudocubus Haeckel, 1887
         1 Pseudocubus obeliscus Haeckel, 1887
         2 Pseudocubus octostylus Haeckel, 1887
         3 †Pseudocubus vema (Hays, 1965)
         4 †Pseudocubus warreni Goll, 1980