[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 Axinellidae Carter, 1875
             1 Genus Acanthella Schmidt, 1862
             2 Genus Auletta Schmidt, 1870
             3 Genus Axinella Schmidt, 1862
             4 Genus Axingella Topsent, 1934 see Subgenus Parasyringella Topsent, 1928
             5 Genus Homaxinella Topsent, 1916
             6 Genus Ophiraphidites Carter, 1876
             7 Genus Phakellia Bowerbank, 1862
             8 Genus Pseudaxinella Schmidt, 1875 see Genus Axinella Schmidt, 1862
             9 Genus Stylissa Hallmann, 1914