[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Archiphormididae Genus Arachnocalpis Haeckel, 1881 Arachnocalpis ovatiretalis Takahashi, 1991