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List of mollusc orders illustrates the 97 orders in the phylum Mollusca, the largest marine animal phylum. 85,000 extant species are described,^[1] making up 23% of described marine organisms.^[2]

Class Aplacophora

Subclass Caudofoveata

No orders, 6 families, 15 genera, 150 species.

Subclass Solenogastres

Order Neomeniamorpha
Order Pholidoskepia

Testaria (unranked)

Class Polyplacophora (Chitons)

Order Multiplacophora †
Order Neoloricata
Order Paleoloricata †

Subphylum Conchifera

Class Bivalvia

Subclass Heterodonta

Superfamily Arcticoidea
Superfamily Cardioidea
Superfamily Chamoidea
Superfamily Clavagelloidea
Superfamily Crassatelloidea
Superfamily Cuspidarioidea
Superfamily Hippuritoida †
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 Tellinoidea
Superfamily Thyasiroidea
Superfamily Ungulinoidea
Superfamily Veneroidea
Superfamily Verticordioidea

Subclass Palaeoheterodonta

Superfamily Trigonioidea
Superfamily Unionoidea

Subclass Protobranchia

Superfamily Manzanelloidea
Superfamily Nuculanoidea
Superfamily Nuculoidea
Superfamily Sapretoidea
Superfamily Solemyoidea

Subclass Pteriomorphia

Superfamily Anomioidea
Superfamily Arcoidea
Superfamily Dimyoidea
Superfamily Limoidea
Superfamily Mytiloidea
Superfamily Ostreoidea
Superfamily Pectinoidea
Superfamily Pinnoidea
Superfamily Plicatuloidea
Superfamily Pterioidea

Class Cephalopoda

Subclass Nautiloidea

Order Plectronocerida †
Order Ellesmerocerida †
Order Actinocerida †
Order Pseudorthocerida †
Order Ascocerida †
Order Endocerida †
Order Tarphycerida †
Order Oncocerida †
Order Discosorida †
Order Nautilida
Order Orthocerida †
Order Lituitida †
Order Dissidocerida †
Order Bactritida †

Subclass Ammonoidea †

Order Goniatitida †
Order Prolecanitida †
Order Ceratitida †
Order Ammonitida †

Subclass Coleoidea

Division Belemnitida

Order Belemnoidea †
Order Aulacocerida †
Order Phragmoteuthida †
Order Donovaniconida †
Order Belemnitida †
Order Hematitida †

Division Neocoleoidea (most living cephalopods)

Superorder Decapodiformes
- Order Boletzkyida †
- Order Spirulida ram's horn squid
- Order Sepiida cuttlefish
- Order Sepiolida bobtail squid
- Order Teuthida squid
Superorder Octopodiformes
- Order Vampyromorphida vampire squid
- Order Octopoda octopus

Class Gastropoda

This overview of orders follows the taxonomy of the Gastropoda (Ponder & Lindberg, 1997):

Order Bellerophontinaka (fossil)
Order Mimospirina (fossil)

Subclass Eogastropoda

Order Euomphalida de Koninck 1881 (fossil)
Order Patellogastropoda Lindberg, 1986 (true limpets)

Live limpets in the intertidal zone in Cornwall, England.

Subclass Orthogastropoda Ponder & David R. Lindberg, 1996

Order Murchisoniina Cox & Knight, 1960 (fossil)
Order Neomphaloida Sitnikova & Starobogatov, 1983

Superorder Vetigastropoda Salvini-Plawen, 1989 (limpets)

The shell of an archaeogastropod from the Pliocene of Cyprus. A serpulid worm is attached.

Superorder Neritaemorphi Koken, 1896

Order Cyrtoneritomorpha (fossil)
Order Neritopsina Cox & Knight, 1960

Superorder Caenogastropoda Cox, 1960

Order Architaenioglossa Haller, 1890
Order Sorbeoconcha Ponder & David R. Lindberg, 1997
- Infraorder Littorinimorpha Golikov & Starobogatov, 1975
- Infraorder Ptenoglossa J.E. Gray, 1853
- Infraorder Neogastropoda Thiele, 1929

Superorder Heterobranchia J.E. Gray, 1840

Order Heterostropha P. Fischer, 1885
Order Opisthobranchia Milne-Edwards, 1848
- Infraorder Euthecosomata
- Infraorder Pseudothecosomata
- Infraorder Anthobranchia Férussac, 1819
- Infraorder Cladobranchia Willan & Morton, 1984
- Suborder Eupulmonata Haszprunar & Huber, 1990
  - Infraorder Acteophila Dall, 1885 (= formerly Archaeopulmonata)

Class Monoplacophora

Order Tryblidiida

Class Rostroconchia †

Order Conocardiida † Newell, 1965
Order Ribeirioida † Kobayashi, 1933
Order Tuarangiida † MacKinnon, 1982

Class Scaphopoda (Tusk shells)

Order Dentaliida
Order Gadilida

References

^ Chapman, A.D. (2009). Numbers of Living Species in Australia and the World, 2nd edition. Australian Biological Resources Study, Canberra. Retrieved 12 January 2010. ISBN 978-0-642-56860-1 (printed); ISBN 978-0-642-56861-8 (online).
^ Hancock, Rebecca (2008). "Recognising research on molluscs". Australian Museum. Archived from the original on 2009-05-30. Retrieved 2009-03-09.

[Chapman_2009-1] Chapman, A.D. (2009). Numbers of Living Species in Australia and the World, 2nd edition. Australian Biological Resources Study, Canberra. Retrieved 12 January 2010. ISBN 978-0-642-56860-1 (printed); ISBN 978-0-642-56861-8 (online).

[HancockRecognisingResearch-2] Hancock, Rebecca (2008). "Recognising research on molluscs". Australian Museum. Archived from the original on 2009-05-30. Retrieved 2009-03-09.

[1]

[2]

List of mollusc orders