[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Phylum Mollusca Linnaeus, 1758 - molluscs
     Class Gastropoda Cuvier, 1795 - snails and slugs
       Family Fissurellidae Fleming, 1822 - keyhole limpets
         1 Genus Fissurella Bruguière, 1789
         2 Genus Diodora Gray, 1821
         3 Genus Emarginula Lamarck, 1801
         4 Genus Cranopsis Adams, 1860
         5 Genus Fissurisepta Seguenza, 1863
         6 Genus Puncturella Lowe, 1827
         7 Genus Zeidora Adams, 1860