Phylum Mollusca Linnaeus, 1758 - molluscs
   Class Bivalvia Linnaeus, 1758 - bivalves
     Subclass Heterodonta Neumayr, 1884 see Clade Heterodonta Neumayr, 1884
       Order Venerida Gray, 1854
         Superfamily Lucinoidea Fleming, 1828
           Family Thyasiridae Dall, 1900 (1895)
             1 Genus Axinus Sowerby, 1821
             2 Subfamily Thyasirinae Dall, 1900 (1895)
             3 Subfamily Axinopsidinae Frank Bernard, 1983