[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 Family Actinommidae Haeckel, 1862 Genus †Xiphatractus Haeckel, 1887 1 †Xiphatractus brevispina Carnevale, 1908 2 †Xiphatractus spumeus Dumitrica, 1973