Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Porifera Grant, 1836 - sponges
     Class Calcarea Bowerbank, 1864 - calcareous sponges
       Subclass Calcinea Bidder, 1898
         Order Murrayonida Vacelet, 1981
           1 Family Lelapiellidae Borojevic, Boury-Esnault & Vacelet, 1990 [monotypic]
           2 Family Murrayonidae Kirkpatrick, 1910 [monotypic]
           3 Family Paramurrayonidae Vacelet, 1967 [monotypic]