[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 Omalogyridae Sars, 1878
         1 Genus Omalogyra Jeffreys, 1860
         2 Genus Ammonicera Vayssière, 1893
         3 Genus Retrotortina Chaster, 1896