# List of mollusc orders

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

## 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)
Subclass Orthogastropoda Ponder & David R. Lindberg, 1996
* Order Murchisoniina Cox & Knight, 1960 (fossil)
* Order Neomphaloida Sitnikova & Starobogatov, 1983
Superorder Vetigastropoda Salvini-Plawen, 1989 (limpets)
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