[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875 Family Pyloniidae Haeckel, 1881 Genus Tholospira Haeckel, 1887 Tholospira cervicornis Haeckel, 1887