[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   [metazoans] Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
     Phylum Porifera Grant, 1836 - sponges
       Class Calcarea Bowerbank, 1864 - calcareous sponges
         Order †Heteractinida Hinde, 1887 see Class Heteractinida de Laubenfels, 1955
           Family †Eiffeliidae Rigby, 1986
             Genus †Eiffelia Walcott, 1920