Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Protobranchia Pelseneer, 1889
       Order Nuculida Dall, 1889
         Superfamily Nuculanoidea Adams & Adams, 1858 (1854)
           Family Spinulidae Allen & Sanders, 1982 [monotypic] see Family Bathyspinulidae Coan & Valentich-Scott, 1997
             Genus Spinula Dall, 1908
               Subgenus Bathyspinula Filatova, 1958 see Genus Bathyspinula Filatova, 1958