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
           1 Subfamily Pachastrellinae Carter, 1875 see Family Pachastrellidae Carter, 1875
           2 Subfamily Calthropellinae von Lendenfeld, 1907 [monotypic] see Family Calthropellidae Lendenfeld, 1906
           3 Subfamily Halininae de Laubenfels, 1934
           4 Genus †Youngella de Laubenfels, 1955
           5 Genus †Acanthophora Sollas, 1873
           6 Genus †Helobrachium Schrammen, 1910
           7 Genus †Paropsites Pocta, 1884
           8 Genus †Propachastrella Schrammen, 1910