[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
           Family Desmoxyidae Hallmann, 1917 see Family Heteroxyidae Dendy, 1905
             1 Genus Didiscus Dendy, 1922
             2 Genus Halicnemia Bowerbank, 1864
             3 Genus "Halicortex" Sarà, 1958 see Genus Paratimea Hallmann, 1917
             4 Genus Heteroxya Topsent, 1898
             5 Genus Higginsia Higgin, 1877
             6 Genus Myrmekioderma Ehlers, 1870