[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Porifera Grant, 1836 - sponges
     Class Demospongiae Sollas, 1885 - demosponges
       Subclass Tetractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
         Order Astrophorida Sollas, 1888 see Suborder Astrophorina Sollas, 1888
           Family Pachastrellidae Carter, 1875
             1 Genus Characella Sollas, 1886
             2 Genus Dercitus Gray, 1867
             3 Genus Nethea Sollas, 1888
             4 Genus Pachastrella Schmidt, 1868
             5 Genus Poecillastra Sollas, 1888
             6 Genus Sphinctrella Schmidt, 1870, nom. illeg. see Genus Sphincterella de Laubenfels, 1936
             7 Genus Triptolemus Sollas, 1888, nom. illeg. see Genus Triptolemma de Laubenfels, 1955