[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838 Order Nassellaria Ehrenberg, 1875 see Class Nassellaria Ehrenberg, 1847 Family Plagiacanthidae Hertwig, 1879 Genus †Tripophaenoscenium Campbell & Clark, 1944 1 †Tripophaenoscenium laimingi Campbell & Clark, 1944