Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Gastropoda Cuvier, 1795 - snails and slugs
     Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848
       Order Gymnosomata Blainville, 1824 - naked pteropods see Suborder Gymnosomata Blainville, 1824
         Family Pneumodermatidae Latreille, 1825
           1 Genus Pneumoderma Roissy, 1805
           2 Genus Abranchaea Zhang, 1964
           3 Genus Crucibranchaea Pruvot-Fol, 1942
           4 Genus Platybrachium Minichev, 1976
           5 Genus Pneumodermopsis Keferstein, 1862
           6 Genus Pruvotella Pruvot-Fol, 1932
           7 Genus Schizobrachium Meisenheimer, 1903
           8 Genus Spongiobranchaea d'Orbigny, 1836