[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 Ceractinomorpha Lévi, 1953 see Class Demospongiae Sollas, 1885
         Order Halichondrida Vosmaer, 1887
           1 Family Axinellidae Carter, 1875
           2 Family Bubaridae Topsent, 1894
           3 Family Agelasidae Verrill, 1907 (1875)
           4 Family Dictyonellidae van Soest, Diaz & Pomponi, 1990
           5 Family Desmoxyidae Hallmann, 1917 see Family Heteroxyidae Dendy, 1905
           6 Family Halichondriidae Gray, 1867