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 †Becksinae Schrammen, 1912 Genus †Oncolpia Pomel, 1872 Subgenus †O. (Polyptycha) Defretin-Lefranc, 1961