living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Parazoa (Sollas, 1884) see Phylum Porifera Grant, 1836
         Phylum Porifera Grant, 1836 - sponges
           Class Demospongiae Sollas, 1885 - demosponges
             Subclass Tetractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
               Order Axinellida Lévi, 1953 see Order Halichondrida Vosmaer, 1887
                 1 Family Axinellidae Carter, 1875
                 2 Family Bubaridae Topsent, 1894
                 3 Family Trachycladidae Hallmann, 1917
                 4 Family Desmoxyidae Hallmann, 1917 see Family Heteroxyidae Dendy, 1905
                 5 Family Hemiasterellidae Lendenfeld, 1889
                 6 Family Sigmaxinellidae see Family Desmacellidae Ridley & Dendy, 1886
                 7 Family Raspailiidae Hentschel, 1923
                 8 Family Euryponidae see Family Raspailiidae Hentschel, 1923
                 9 Family Rhabderemiidae Topsent, 1928