[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 Agelasidae Verrill, 1907 (1875), nom. protect.
             Genus Agelas Duchassaing & Michelotti, 1864