• Subclass Paleotaxodonta
  • • Order Nuculoida
      • • Superfamily Nuculoidea
          • Nuculidae
        • Superfamily Nuculanoidea
          • Nuculanidae
          • Malletiidae
          • Tindariidae
• Subclass Cryptodonta
  • • Order Solemyoida
      • • Superfamily Solemyoidea
          • Solemyidae
• Subclass Pteriomorphia
  • Superorder Isofilibranchia
    • Order Mytiloida
      • • Superfamily Mytiloidea
          • Mytilidae
  • Superorder Prionodonta
    • Order Arcoida
      • • Superfamily Arcoidea
          • Arcidae
          • Cucullaeidae
          • Noetiidae
          • Parallelodontidae
        • Superfamily Limopsoidea
          • Limopsidae
          • Glycymerididae
          • Philobryidae
  • Superorder Eupteriomorphia
    • Order Pterioida
      • • Superfamily Pterioidea
          • Pteriidae
          • Malleidae
          • Isognomonidae
        • Superfamily Pinnoidea
          • Pinnidae
    • Order Limoida
      • • Superfamily Limoidea
          • Limidae
    • Order Ostreoida
      • Suborder Ostreina
        • Superfamily Ostreoidea
          • Ostreidae
          • Gryphaeidae
        • Superfamily Dimyoidea
          • Dimyidae
        • Superfamily Plicatuloidea
          • Dimyidae
      • Suborder Pectinina
        • Superfamily Anomioidea
          • Anomiidae
          • Placunidae
        • Superfamily Pectinoidea
          • Pectinidae
          • Propeamussiidae
          • Spondylidae
• Subclass Paleoheterodonta
  • • Order Trigonioida
      • • Superfamily Trigonioidea
          • Trigoniidae
• Subclass Heterodonta
  • • Order Veneroida
      • • Superfamily Lucinoidea
          • Lucinidae
          • Fimbriidae
          • Thyasiridae
          • Ungulinidae
        • Superfamily Cyamioidea
          • Cyamiidae
          • Gaimardiidae
        • Superfamily Galeommatoidea
          • Galeommatidae
          • Lasaeidae
          • Montacutidae
        • Superfamily Carditoidea
          • Carditidae
        • Superfamily Chamoidea
          • Chamidae
        • Superfamily Crassatelloidea
          • Crassatellidae
          • Astartidae
        • Superfamily Cardioidea
          • Cardiidae
          • Hemidonacidae
          • Tridacnidae
        • Superfamily Mactroidea
          • Mactridae
          • Mesodesmatidae
          • Cardiliidae
          • Anatinellidae
        • Superfamily Solenoidea
          • Solenidae
          • Cultellidae
        • Superfamily Tellinoidea
          • Tellinidae
          • Donacidae
          • Psammobiidae
          • Semelidae
        • Superfamily Arcticoidea
          • Arcticidae
          • Trapeziidae
        • Superfamily Glossoidea
          • Glossidae
          • Vesicomyidae
        • Superfamily Corbiculoidea
          • Corbiculidae
        • Superfamily Veneroidea
          • Veneridae
          • Petricolidae
          • Cooperellidae
          • Glauconomidae
    • Order Myoida
      • • Superfamily Myoidea
          • Myidae
          • Corbulidae
        • Superfamily Gastrochaenoidea
          • Gastrochaenidae
        • Superfamily Hiatelloidea
          • Hiatellidae
        • Superfamily Pholadoidea
          • Pholadidae
          • Teredinidae
• Subclass Anomalodesmata
  • • Order Pholadomyoida
      • • Superfamily Pholadomyoidea
          Pholadomyidae
        • Superfamily Pandoroidea
          • Pandoridae
          • Lyonsiidae
          • Cleidothaeridae
          • Myochamidae
        • Superfamily Poromyoidea
          • Poromyidae
          • Cuspidariidae
          • Verticordiidae
        • Superfamily Thracioidea
          • Laternulidae
          • Periplomatidae
          • Thraciidae
        • Superfamily Clavagelloidea
          • Clavagellidae

The above material has been adapted from Dr. Rosenberg's The Encyclopedia of Seashells, published by Robert Halt, Ltd., London, 1992.