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
             Genus †Coeloptychium Goldfuss, 1826
               1 Subgenus †C. (Coeloptychium) Goldfuss, 1826
               2 Subgenus †C. (Lophoptychium) Pomel, 1872
               3 Subgenus †C. (Myrmecioptychium) Schrammen, 1912