Class Bivalvia Linnaeus, 1758 - bivalves
Status: extant; Count: [*†*] 16o;110f; †6o;225f [31 Jan 2022]
   Subclass Protobranchia Pelseneer, 1889
  Status: extant; Count: [*†*] 3o;12f; †14f [26 Jan 2022]
     Order Nuculanida Carter, Campbell & Campbell, 2000 [monotypic]
    Status: extant; Count: [*†*] 8f; †5f [26 Jan 2022]
       Superfamily Nuculanoidea Adams & Adams, 1858 (1854)
      Status: extant; Count: [*†*] 8f; †5f [26 Jan 2022]
         Family Malletiidae Adams & Adams, 1858 (1846)
        Status: extant; Count: -