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Cuvier, 1797

The largest and in many ways the most succesful of the main divisions into which the phylum Mollusca is split. More than 60.000 species in marine, freshwater and in terrestrial habitats. Body asymmetrical. Head well-developed, with eyes and sensory tentacles. Visceral mass rotated through 180° in early embryogeny, a process known as torsion, giving the looped gut and nervous system, and anteriorly situated mantle cavity characteristic of the class. Secondary detorsion occurs in some groups. Shell of one piece, prematively conical, typically spiralled. Ventral foot well-developed, used for crawling, burrowing, and swimming. Feeding modes diverse.

Source: Hayward et al., 1990.

The following subtaxa of this class occur in the region:

Subclass Heterobranchia
Subclass Opisthobranchia
Subclass Prosobranchia
Subclass Pulmonata
Superorder Archaeogastropoda
Superorder Caenogastropoda
Order Acochlidioidea
Order Anaspidea
Order Basommatophora
Order Cephalaspidea
Order Docoglossa
Order Heterostropha
Order Neogastropoda
Order Neotaenioglossa
Order Notaspidea
Order Nudibranchia
Order Sacoglossa
Order Vetigastropoda
Suborder Aeolidiina
Suborder Arminina
Suborder Dendronotina
Suborder Doridina
Suborder Ptenoglossa
Superfamily Ellobioidea
Superfamily Scissurelloidea
Family Aclididae
Family Acmaeidae
Family Acteonidae
Family Adeorbidae
Family Aegiretidae
Family Aeolidiidae
Family Akeridae
Family Aldisidae
Family Aplysiidae
Family Aporrhaiidae
Family Archidorididae
Family Arminidae
Family Asperspinidae
Family Assimineidae
Family Barleeidae
Family Buccinidae
Family Caecidae
Family Calyptraeidae
Family Capulidae
Family Cerithiidae
Family Cerithiopsidae
Family Chromodorididae
Family Cimidae
Family Corambidae
Family Cylichnidae
Family Dendronotidae
Family Diaphanidae
Family Discodorididae
Family Dotidae
Family Ebalidae
Family Ellobiidae
Family Elysiidae
Family Embletoniidae
Family Epitoniidae
Family Eratoidae
Family Eubranchidae
Family Eulimidae
Family Facelinidae
Family Favorinidae
Family Fissurellidae
Family Flabellinidae
Family Goniodorididae
Family Haliotidae
Family Heroidae
Family Hydrobiidae
Family Iravadiidae
Family Kentrodorididae
Family Lacunidae
Family Lamellariidae
Family Lepetidae
Family Littorinidae
Family Lomanotidae
Family Lottiidae
Family Microhedylidae
Family Muricidae
Family Nassariidae
Family Naticidae
Family Neritidae
Family Omalogyridae
Family Onchidorididae
Family Otinidae
Family Ovulidae
Family Patellidae
Family Philinidae
Family Philinoglossidae
Family Pleurobranchidae
Family Polybranchiidae
Family Polyceridae
Family Pyramidellidae
Family Ranellidae
Family Retusidae
Family Rissoellidae
Family Rissoidae
Family Rostangidae
Family Runcinidae
Family Scissurellidae
Family Skeneidae
Family Skeneopsidae
Family Stiligeridae
Family Tergipedidae
Family Tornidae
Family Tricoliidae
Family Triphoridae
Family Tritoniidae
Family Triviidae
Family Trochidae
Family Turridae
Family Turritellidae
Family Velutinidae
Family Zephyrinidae
Subfamily Polybranchiinae
Genus Acanthodoris
Genus Aclis
Genus Acmaea
Genus Acteon
Genus Adalaria
Genus Aegires
Genus Aeolidia
Genus Aeolidiella
Genus Akera
Genus Alderia
Genus Aldisa
Genus Alvania
Genus Amauropsis
Genus Ammonicera
Genus Anatoma
Genus Ancula
Genus Ansates
Genus Aplysia
Genus Aporrhais
Genus Archidoris
Genus Armina
Genus Asperspina
Genus Assiminea
Genus Auriculinella
Genus Barleeia
Genus Bela
Genus Beringius
Genus Berthella
Genus Bittium
Genus Buccinum
Genus Cadlina
Genus Caecum
Genus Calliopaea
Genus Calliostoma
Genus Calyptraea
Genus Capulus
Genus Cerithiella
Genus Cerithiopsis
Genus Charonia
Genus Cheirodonta
Genus Chrysallida
Genus Cima
Genus Cingula
Genus Circulus
Genus Clelandella
Genus Colpodaspis
Genus Colus
Genus Comarmondia
Genus Corambe
Genus Coryphella
Genus Crepidula
Genus Crisilla
Genus Cuthona
Genus Cylichna
Genus Dendronotus
Genus Diaphana
Genus Dikoleps
Genus Diodora
Genus Doto
Genus Ebala
Genus Elysia
Genus Emarginula
Genus Embletonia
Genus Epitonium
Genus Erato
Genus Eubranchus
Genus Eulima
Genus Eulimella
Genus Euspira
Genus Facelina
Genus Favorinus
Genus Geitodoris
Genus Gibbula
Genus Goniodoris
Genus Graphis
Genus Haliella
Genus Haliotis
Genus Hermaea
Genus Hero
Genus Hyala
Genus Hydrobia
Genus Iothia
Genus Janolus
Genus Jorunna
Genus Jujubinus
Genus Lacuna
Genus Lamellaria
Genus Lepeta
Genus Limacia
Genus Limapontia
Genus Liomesus
Genus Littorina
Genus Lomanotus
Genus Mangelia
Genus Manzonia
Genus Margarites
Genus Marshallora
Genus Melanella
Genus Melaraphe
Genus Mercuria
Genus Microhedyle
Genus Nassarius
Genus Neptunea
Genus Noemiamea
Genus Nucella
Genus Obtusella
Genus Ocenebra
Genus Odostomia
Genus Oenopota
Genus Okenia
Genus Omalogyra
Genus Onchidoris
Genus Ondina
Genus Onoba
Genus Osilinus
Genus Otina
Genus Ovatella
Genus Patella
Genus Pelseneeria
Genus Philine
Genus Philinoglossa
Genus Placida
Genus Pleurobranchus
Genus Polycera
Genus Potamopyrgus
Genus Propilidium
Genus Puncturella
Genus Pusillina
Genus Raphitoma
Genus Retusa
Genus Rissoella
Genus Rostanga
Genus Roxania
Genus Runcina
Genus Scaphander
Genus Semisalsa
Genus Simnia
Genus Skenea
Genus Skeneopsis
Genus Tectura
Genus Tenellia
Genus Teretia
Genus Tergipes
Genus Thecacera
Genus Theodoxus
Genus Tornus
Genus Trichotropis
Genus Tricolia
Genus Tritonia
Genus Trivia
Genus Trophon
Genus Troschelia
Genus Turbonilla
Genus Turritella
Genus Typhlomangelia
Genus Urosalpinx
Genus Velutina
Genus Ventrosia
Genus Vitreolina
Genus Volutopsius
Genus Volvulella
Acanthodoris pilosa
Aclis minor
Aclis walleri
Acmaea virginea
Acteon tornatilis
Adalaria proxima
Aegires punctilucens
Aeolidia papillosa
Aeolidiella glauca
Akera bullata
Alderia modesta
Aldisa zetlandica
Alvania abyssicola
Alvania beani
Alvania cimicoides
Alvania jeffreysi
Alvania lactea
Alvania punctura
Alvania subsoluta
Amauropsis islandica
Ammonicera rota
Anatoma crispata
Ancula gibbosa
Ansates pellucida
Aplysia punctata
Aporrhais pespelecani
Aporrhais serresianus
Archidoris pseudoargus
Armina loveni
Asperspina brambelli
Assiminea grayana
Auriculinella erosa
Barleeia unifasciata
Bela brachystoma
Bela nebula
Beringius turtoni
Berthella plumula
Bittium reticulatum
Buccinum humphreysianum
Buccinum hydrophanum
Buccinum undatum
Cadlina laevis
Caecum clarkii
Caecum glabrum
Caecum trachea
Calliopaea bellula
Calliostoma occidentale
Calliostoma zizyphinum
Calyptraea chinensis
Capulus ungaricus
Cerithiella metula
Cerithiopsis tubercularis
Charonia lampas
Cheirodonta pallescens
Chrysallida indistincta
Chrysallida interstincta
Chrysallida nivosa
Chrysallida pellucida
Chrysallida sarsi
Cima minima
Cingula trifasciata
Circulus striatus
Clelandella miliaris
Colpodaspis pusillus
Colus gracilis
Colus islandicus
Colus jeffreysianus
Comarmondia gracilis
Corambe obscura
Coryphella browni
Coryphella gracilis
Coryphella lineata
Coryphella pedata
Coryphella pellucida
Coryphella verrucosa
Crepidula fornicata
Crisilla semistriata
Cuthona amoena
Cuthona caerulea
Cuthona concinna
Cuthona foliata
Cuthona gymnota
Cuthona nana
Cuthona pustulata
Cuthona rubescens
Cuthona viridis
Cylichna cylindracea
Dendronotus frondosus
Diaphana minuta
Dikoleps pusilla
Diodora graeca
Doto coronata
Doto cuspidata
Doto dunnei
Doto fragilis
Doto millbayana
Doto pinnatifida
Doto tuberculata
Ebala nitidissima
Elysia viridis
Emarginula crassa
Emarginula fissura
Emarginula rosea
Embletonia pulchra
Epitonium clathratulum
Epitonium clathrus
Epitonium trevelyanum
Epitonium turtonis
Erato voluta
Eubranchus cingulatus
Eubranchus doriae
Eubranchus exiguus
Eubranchus farrani
Eubranchus pallidus
Eubranchus tricolor
Eubranchus vittatus
Eulima bilineata
Eulima glabra
Eulimella acicula
Eulimella scillae
Eulimella ventricosa
Euspira catena
Euspira fusca
Euspira montagui
Euspira pallida
Euspira pulchella
Facelina bostoniensis
Facelina coronata
Favorinus blianus
Favorinus branchialis
Geitodoris planata
Gibbula cineraria
Gibbula magus
Gibbula pennanti
Gibbula tumida
Gibbula umbilicalis
Goniodoris castanea
Goniodoris nodosa
Graphis albida
Haliella stenostoma
Haliotis tuberculata
Hermaea bifida
Hero formosa
Hyala vitrea
Hydrobia neglecta
Hydrobia ulvae
Iothia fulva
Janolus cristatus
Janolus hyalinus
Jorunna tomentosa
Jujubinus exasperatus
Jujubinus montagui
Jujubinus striatus
Lacuna crassior
Lacuna pallidula
Lacuna parva
Lacuna vincta
Lamellaria latens
Lamellaria perspicua
Lepeta caeca
Limacia clavigera
Limapontia capitata
Limapontia depressa
Limapontia senestra
Liomesus ovum
Littorina arcana
Littorina fabalis
Littorina littorea
Littorina neglecta
Littorina nigrolineata
Littorina obtusata
Littorina saxatilis
Lomanotus genei
Lomanotus marmoratus
Mangelia attenuata
Mangelia coarctata
Mangelia smithii
Manzonia crassa
Margarites groenlandicus
Margarites helicinus
Marshallora adversa
Melanella alba
Melanella lubrica
Melanella monterosatoi
Melaraphe neritoides
Mercuria confusa
Microhedyle lactea
Nassarius incrassatus
Nassarius nitidus
Nassarius pygmaeus
Nassarius reticulatus
Neptunea antiqua
Neptunea contraria
Noemiamea dolioliformis
Nucella lapillus
Obtusella intersecta
Ocenebra erinacea
Odostomia acuta
Odostomia carrozzai
Odostomia conoidea
Odostomia conspicua
Odostomia eulimoides
Odostomia lukisii
Odostomia plicata
Odostomia scalaris
Odostomia turrita
Odostomia unidentata
Oenopota rufa
Oenopota trevelliana
Oenopota turricula
Okenia leachii
Okenia quadricornis
Omalogyra atomus
Onchidoris depressa
Onchidoris fusca
Onchidoris inconspicua
Onchidoris luteocincta
Onchidoris muricata
Onchidoris pusilla
Onchidoris sparsa
Ondina diaphana
Ondina divisa
Onoba aculea
Onoba semicostata
Osilinus lineatus
Otina ovata
Ovatella denticulata
Ovatella myosotis
Patella intermedia
Patella ulyssiponensis
Patella vulgata
Pelseneeria minor
Philine angulata
Philine aperta
Philine catena
Philine pruinosa
Philine punctata
Philine quadrata
Philine scabra
Philinoglossa helgolandica
Placida dendritica
Pleurobranchus membranaceus
Polycera dubia
Polycera faeroensis
Polycera notha
Polycera quadrilineata
Potamopyrgus antipodarum
Propilidium exiguum
Puncturella noachina
Pusillina inconspicua
Pusillina sarsii
Raphitoma leufroyi
Raphitoma linearis
Raphitoma purpurea
Retusa obtusa
Retusa truncatula
Retusa umbilicata
Rissoa lilacina
Rissoa membranacea
Rissoa parva
Rissoa porifera
Rissoella diaphana
Rissoella globularis
Rissoella opalina
Rostanga rubra
Roxania utricula
Runcina coronata
Scaphander lignarius
Semisalsa stagnorum
Simnia patula
Skenea serpuloides
Skeneopsis planorbis
Tectura testudinalis
Tenellia adspersa
Teretia teres
Tergipes tergipes
Thecacera pennigera
Theodoxus fluviatilis
Tornus subcarinatus
Trichotropis borealis
Tricolia picta
Tritonia hombergi
Tritonia lineata
Tritonia plebeia
Trivia arctica
Trivia monacha
Trophon barvicensis
Trophon clathratus
Trophon muricatus
Trophon truncatus
Troschelia berniciensis
Turbonilla crenata
Turbonilla jeffreysii
Turbonilla lactea
Turbonilla rufescens
Turritella communis
Typhlomangelia nivalis
Urosalpinx cinerea
Velutina plicatilis
Velutina velutina
Ventrosia ventrosa
Vitreolina philippi
Volutopsius norwegicus
Volvulella acuminata

Class Gastropoda