Class Bivalvia Linnaeus, 1758 - bivalves
Count: [*†*] 16o;110f; †6o;225f [31 Jan 2022]
   Subclass Autobranchia Grobben, 1894
  Count: [*†*] 13o;98f; †6o;203f [31 Jan 2022]
     Superorder Heteroconchia Gray, 1854
    Count: [*†*] 7o;75f; †3o;116f [31 Jan 2022]
       Clade Palaeoheterodonta Newell, 1965
      Count: [*†*] 2o;7f; †27f [29 Jan 2022]
         Order Unionida Gray, 1854
        Count: [*†*] 6f; †12f [29 Jan 2022]
           Superfamily †Trigonioidoidea Cox, 1952
          Count: [†*] †6f [29 Jan 2022]
             Family †Trigonioididae Cox, 1952
            Count: -
               Subfamily †Martinsonellinae Sha, 1993
              Count: -