[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 Bursidae Thiele, 1925 - frog snails
         Genus Bursa Röding, 1798
           Bursa marginata (Gmelin, 1791)
           ?Bursa ranelloides Reeve, 1844 - fine-sculpted frogsnail
           Bursa scrobiculator (C. Linnaeus, 1758)
           Bursa thomae (d'Orbigny, 1842) - St. Thomas frogsnail