The Mollusks - Clams, snails & related (Mollusca) - Phylum
(Aplacophora) - class
(Caudofoveata) - subclass

(Chaetodermatidae)
- family

(Falcidentidae)
- family

(Limifossoridae)
- family

(Metachaetodermatidae)
- family

(Prochaetodermatidae)
- family

(Scutopodidae)
- family
(Solenogastres) - subclass

(Neomeniamorpha)
- order

(Pholidoskepia)
- order

(Cavibelonia)
- order

(Sterrofustia)
- order
The Chitons (Polyplacophora) - class
(750 species)

(Chaetodermatidae)
- family

(Falcidentidae)
- family

(Limifossoridae)
- family

(Metachaetodermatidae)
- family

(Prochaetodermatidae)
- family
The Monoplacophorans (Monoplacophora) - class

(Tryblidiidae)
- family

(Palaeacmaeidae)
- family
The Snails & Slugs (Gastropoda) - class
(35,000 species)
Snails & Slugs
(Panpulmonata)
- order

(Euopisthobranchia)
- order

(Nudipleura)
- order

(Caenogastropoda)
- order

(Neritimorpha)
- order

(Vetigastropoda)
- order

(Patellogastropoda)
- order
The Squids, Octopuses, Cuttlefishes, Nautiluses, Spirulas (Cephalopoda) - class

(Achatinellidae)
- family

(Camaenidae)
- family

(Onchidiidae)
- family

(Bulimulidae)
- family

(Orthalicidae)
- family

(Rathouisiidae)
- family

(Veronicellidae)
- family
The (Coleoidea) - subclass
The (Neocoleoidea) -
The (Octopodiformes) - superorder

()
- family
The Octopuses (Octopoda) - order

(Keuppia)
- genera

(Palaeoctopus)
- genera

(Paleocirroteuthis)
- genera

(Pohlsepia)
- genera

(Proteroctopus)
- genera

(Styletoctopus)
- genera
(Cirrina) - suborder
Umbrella Octopus
(Opisthoteuthidae)
- family

(Cirroctopodidae)
- family

(Cirroteuthidae)
- family

(Stauroteuthidae)
- family
(Incirrina ) - suborder
(Octopodoidea) - superfanily

(Amphitretidae)
- family

(Bathypolypodidae)
- family

(Eledonidae)
- family

(Enteroctopodidae)
- family

(Megaleledonidae)
- family

(Octopodidae)
- family
(Argonautoidea) - superfanily
The Seven-Arm Octopuses
(Alloposidae)
- family
The Argonauts
(Argonautidae)
- family
The Cuberculate Pelagic Octopuses
(Ocythoidae)
- family
The Blanket Octopuses
(Tremoctopodidae)
- family
The (Vampyromorphida) - order

(Kelaenina)
- suborder -extinct-

(Prototeuthina)
- suborder -extinct-

(Mesoteuthina)
- suborder -extinct-

(Vampyromorphina)
- suborder
The Clams, Oysters, Scallops, Geoducks, Mussels (Bivalvia) - class
The (Heterodonta) - subclass

(Arcticoidea)
- superfamily

(Cardioidea)
- superfamily

(Chamoidea)
- superfamily

(Clavagelloidea)
- superfamily

(Crassatelloidea)
- superfamily

(Cuspidarioidea)
- superfamily

(Cyamioidea)
- superfamily

(Cyrenoidea)
- superfamily

(Cyrenoidoidea)
- superfamily

(Dreissenoidea)
- superfamily

(Galeommatoidea)
- superfamily

(Gastrochaenoidea)
- superfamily

(Glossoidea)
- superfamily

(Hemidonacoidea)
- superfamily

(Hiatelloidea)
- superfamily

(Limoidea)
- superfamily

(Lucinoidea)
- superfamily

(Mactroidea)
- superfamily

(Myoidea)
- superfamily

(Pandoroidea)
- superfamily

(Pholadoidea)
- superfamily

(Pholadomyoidea)
- superfamily

(Solenoidea)
- superfamily

(Sphaerioidea)
- superfamily
The Saltwater Clams
(Tellinoidea)
- superfamily

(Thyasiroidea)
- superfamily

(Ungulinoidea)
- superfamily

(Veneroidea)
- superfamily

(Verticordioidea)
- superfamily
The (Palaeoheterodonta) - subclass

(Trigonioidea)
- superfamily

(Unionoidea)
- superfamily
The (Protobranchia) - subclass

(Manzanelloidea)
- superfamily

(Nuculanoidea)
- superfamily

(Nuculoidea)
- superfamily

(Sapretoidea)
- superfamily

(Solemyoidea)
- superfamily
The (Pteriomorpha) - subclass

(Anomioidea)
- superfamily

(Arcoidea)
- superfamily

(Dimyoidea)
- superfamily

(Limoidea)
- superfamily

(Mytiloidea)
- superfamily

(Ostreoidea)
- superfamily

(Pectinoidea)
- superfamily

(Pinnoidea)
- superfamily

(Plicatuloidea)
- superfamily

(Pterioidea)
- superfamily
The Tusk Shells (Scaphopoda) - class

(Anulidentaliidae)
- family

(Calliodentaliidae)
- family

(Dentaliidae)
- family

(Fustiariidae)
- family

(Gadilinidae)
- family

(Laevidentaliidae)
- family

(Omniglyptidae)
- family

(Rhabdidae)
- family

(Entalinidae)
- family

(Gadilidae)
- family

(Pulsellidae)
- family

(Wemersoniellidae)
- family
(Rostroconchia) - class -extinct-

()
-extinct-

()
-extinct-

()
-extinct-

()
-extinct-
(Helcionelloida) - class -extinct-

(Helcionelliformes)
- order

(Pelagiallifomes)
- order

(Khairkhaniifomes)
- order

(Onichochiliformes)
- order