Phylum Porifera Grant, 1836 - sponges Class Hexactinellida Schmidt, 1870 - hexactinellids Subclass Hexasterophora Schulze, 1886 Order Lychniscosa Schrammen, 1903 see Order Lychniscosida Schrammen, 1903 Family †Coeloptychidae Roemer, 1864 Subfamily †Coeloptychinae Roemer, 1864 1 Genus †Coeloptychium Goldfuss, 1826 2 Genus †Troegerella Ulbrich, 1974