Cnidaria Hatschek, 1888 - cnidarians Class Scyphozoa Goette, 1887 - jellyfish Order Rhizostomae see Order Rhizostomeae Cuvier, 1799 1 Family Rhizostomatidae Cuvier, 1799 2 Family Cepheidae Agassiz, 1862 3 Family Cassiopeidae L. Agassiz, 1862