[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 Tethydidae Rafinesque, 1815
         1 Genus Tethys Linnaeus, 1767, nom. cons.
         2 Genus Melibe Rang, 1829