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.

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

Subclass Solenogastres

 * Order Neomeniamorpha
 * Order Pholidoskepia

Class Polyplacophora (Chitons)

 * Order Multiplacophora †
 * Order Neoloricata
 * Order Paleoloricata †

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

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 †

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):

Subclass Eogastropoda Subclass Orthogastropoda Ponder & David R. Lindberg, 1996  Superorder Vetigastropoda Salvini-Plawen, 1989 (limpets) Superorder Neritaemorphi Koken, 1896 Superorder Caenogastropoda Cox, 1960 Superorder Heterobranchia J.E. Gray, 1840
 * Order Bellerophontinaka (fossil)
 * Order Mimospirina (fossil)
 * Order Euomphalida de Koninck 1881 (fossil)
 * Order Patellogastropoda Lindberg, 1986 (true limpets)
 * Order Murchisoniina Cox & Knight, 1960 (fossil)
 * Order Neomphaloida Sitnikova & Starobogatov, 1983
 * Order Cyrtoneritomorpha (fossil)
 * Order Neritopsina Cox & Knight, 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
 * 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 †
No information available below class

Class Scaphopoda (Tusk shells)

 * Order Dentaliida
 * Order Gadilida