Phylum Porifera Grant, 1836 - sponges Class Hexactinellida Schmidt, 1870 - hexactinellids Subclass Hexasterophora Schulze, 1886 Order Lychniscosa Schrammen, 1903 see Order Lychniscosida Schrammen, 1903 Family Callodictyonidae Zittel, 1878 Subfamily Callicylicinae Reid, 2004 Genus †Callicylix Schrammen, 1912 Subgenus †C. (Cyclostigma) Schrammen, 1912