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 Heterodonta Neumayr, 1884
      Count: [*†*] 5o;68f; †3o;86f [31 Jan 2022]
         †"Megalodonts"
        Count: [†*] †7f [29 Jan 2022]
           Family †Wallowaconchidae Yancey & Stanley, 1999
          Count: -