Phylum Porifera Grant, 1836 - sponges
   Class Hexactinellida Schmidt, 1870 - hexactinellids
     Subclass Hexasterophora Schulze, 1886
       Order Lychniscosa Schrammen, 1903 see Order Lychniscosida Schrammen, 1903
         Family Dactylocalycidae Gray, 1867
           1 Subfamily †Dactylocalycinae Gray, 1867
           2 Subfamily †Ophrystomatinae Schrammen, 1912 [monotypic]
           3 Genus †Jima de Laubenfels, 1955
           4 Genus †Meandrospongia d'Orbigny, 1849
           5 Genus †Pyrospongia Zahálka, 1900
           6 Genus †Scleroplegma Schmidt, 1880