Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Protobranchia Pelseneer, 1889
       Order Solemyida Dall, 1889
         Superfamily Nucinelloidea Vokes, 1956 [monotypic] see Superfamily Manzanelloidea Chronic, 1952
           Family Nucinellidae Vokes, 1956 see Family Manzanellidae Chronic, 1952
             1 Genus Nucinella Wood, 1851
             2 Genus Huxleyia Adams, 1860