Phylum Porifera Grant, 1836 - sponges
   Class Demospongea Sollas, 1875 see Class Demospongiae Sollas, 1885
     Subclass Choristida Sollas, 1880 see Order Tetractinellida Marshall, 1876
       Order Pachastrellida Reid, 2004 see Suborder Astrophorina Sollas, 1888
         Family Pachastrellidae Carter, 1875
           Subfamily Calthropellinae von Lendenfeld, 1907 [monotypic] see Family Calthropellidae Lendenfeld, 1906
             1 Genus †Calthropella Sollas, 1888