Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Parazoa (Sollas, 1884) see [unranked] Parazoa (Sollas, 1884)
       Phylum Spongia
         Class Demospongiae Sollas, 1885 - demosponges
           Order Cornacuspongida
             Suborder Phthinorhabdina
               Family Spongillidae Gray, 1867
                 Genus [Spongilla] Lamarck, 1816
                   Spongilla fragilis (Leidy, 1851) see Eunapius fragilis (Leidy, 1851)