[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 Trochidae Rafinesque, 1815 - top snails
         Genus Phorcus Risso, 1826
           Phorcus mutabilis (Philippi, 1846)
           Phorcus richardi (Payraudeau, 1826)