Ga
- Gabbia
- Gabbiella
- Gabrielona
- Gadila
- Gadilida
- Gadilidae
- Gadilina
- Gadilinidae
- Gafrarium
- Gaimardia
- Galadistes
- Galatheavalva
- Galatheavalvidae
- Galba
- Galeoctopus
- Galeodea
- Galeodinopsis
- Galeojanolus
- Galeomma
- Galeommatidae
- Galeommatoidea
- Galeommella
- Galiteuthis
- Gallardoia
- Galvinella
- Ganesa
- Gangetia
- Ganitidae
- Ganitus
- Gargamella
- Gari
- Gascoignella
- Gasteropteridae
- Gasteropteron
- Gasterosiphon
- Gastrana
- Gastrochaena
- Gastrochaenidae
- Gastrochaenoidea
- Gastrodontoidea
Razred Gastropoda Cuvier, 1795
- Caenogastropoda Cox, 1960
- Cocculiniformia Haszprunar, 1987
- Gastropoda incertae sedis †
- Heterobranchia Burmeister, 1837
- Neomphalina
- Neritimorpha Golikov & Starobogatov, 1975
- Patellogastropoda Lindberg, 1986
- Vetigastropoda Salvini-Plawen, 1980
Animalia → Mollusca → Cyrtosoma
- Gastropteridae
- Gastropteron
- Gatliffena
- Gaza
- Gazameda
Ge
- Geitodoris
- Geminoropa
- Gemixystus
- Gemma
- Gemmula
- Gemmuloborsonia
- Gemophos
- Genaxinus
- Genitoconia
- Genkaimurex
- Gennaeosinum
- Genota
- Genotina
Geotrochus Hasselt, 1823
- Geotrochus affinis (Smith, 1894)
- Geotrochus alexis (Smith, 1895)
- Geotrochus bongaoensis (Smith, 1894)
- Geotrochus conicoides Metcalfe, 1851
- Geotrochus conus (Philippi, 1841)
- Geotrochus everetti (Godwin Austen, 1891)
- Geotrochus heraclea (Smith, 1895)
- Geotrochus isabellensis (Souverbie, 1863)
- Geotrochus kinabaluensis (Smith, 1895)
- Geotrochus labuanensis Pfeiffer, 1863
- Geotrochus meristotrochus Vermeulen, Schilthuizen & Liew MS
- Geotrochus obscura Vermeulen, Schilthuizen & Liew MS
- Geotrochus pallida (Smith, 1895)
- Geotrochus paraguensis (Smith, 1893)
- Geotrochus rhysa Tillier & Bouchet, 1988
- Geotrochus rimatus Vermeullen, 1997
- Geotrochus saigonensis (Crosse, 1867)
- Geotrochus subtricolor (Mabille, 1887)
- Geotrochus whiteheadi (Smith, 1895)
- Geotrochus zonatus Hasselt, 1823
Mollusca → Gastropoda → Pulmonata → Helicarionoidea → Helicarionidae → Helicarioninae
- Gephyroherpia
- Gerdiella
- Gergovia
- Germainaia
- Germonea
- Gerontia
- Gerstfeldtiancylus
- Geukensia
- Geyeria
Gi
- Gibberula
- Gibberulus
- Gibbomodiola
- Gibborissoa
- Gibbula
Gigantidas Cosel & B. A. Marshall, 2003
- Gigantidas coseli Saether et al., 2010 †
- Gigantidas gladius Cosel & B. A. Marshall, 2003
- Gigantidas horikoshii Hashimoto & Yamane, 2005
- Gigantidas tangaroa (Cosel & B. A. Marshall, 2003)
- Gigantidas tangaroa tuerkayi (Cosel & R. Janssen, 2008)
Mollusca → Bivalvia → Mytilida → Mytiloidea → Mytilidae
†Gigantocyclus Termier and Termier 1977
- †Gigantocyclus zidensis Termier and Termier 1977 [1]
Mollusca → Bivalvia → Lucinida → Lucinoidea → Lucinidae
- Gillia
- Ginaia
- Ginebis
- Gingicithara
Gl
- Glabella
- Glacidorbidae
- Glacidorbis
- Glacidorboidea
- Glans
- Glaphyrina
- Glaucidae
- Glauconome
- Glauconomidae
Glaucus Forster, 1777
- Glaucus atlanticus Forster, 1777
- Glaucus bennettae Churchill, Valdés & Ó Foighil, 2014
- Glaucus marginatus (Reinhardt & Bergh, 1864)
- Glaucus mcfarlanei Churchill, Valdés & Ó Foighil, 2014
- Glaucus thompsoni Churchill, Valdés & Ó Foighil, 2014
Mollusca → Gastropoda → Nudibranchia → Aeolidida → Aeolidioidea → Glaucidae
Gleba Forsskål in Niebuhr, 1776
- Gleba cordata Forsskål in Niebuhr, 1776
Mollusca → Gastropoda → Thecosomata → Pseudothecosomata → Cymbulioidea → Cymbuliidae → Glebinae
-
Gleba cordata
Glebula Conrad, 1853
- Glebula rotundata (Lamarck, 1819)
Mollusca → Bivalvia → Unionoida → Unionoidea → Unionidae → Ambleminae → Lampsilini
- Globidrillia
- Globisinum
- Globivenus
- Globocornidae
- Globocornus
- Globophiline
- Globovula
- Gloeria
- Gloreugenia
- Glorichlamys
- Gloripallium
- Glossaulax
- Glossidae
- Glossocardia
- Glossodoris
- Glossoidea
- Glossus
- Gloverina
- Glycymerididae
- Glycymeris
- Glyphostoma
- Glyphostomoides
- Glyphoturris
- Glyptaesopus
- Glyptamoda
- Glyptanachis
- Glypteuthria
- Glyptoactis
- Glyptophysa
- Glyptorhagada
Gn
- Gnarosophia
Go
- Gocea
- Godfreyena
- Godiva
- Godlewskia
- Goethemia
- Gofasia
- Gomphina
- Gomphinella
- Gonatidae
- Gonatopsis
- Gonatus
- Goniaeolididae
- Goniaeolis
- Gonidea
- Gonilia
- Gonimyrtea
- Goniobranchus
- Goniocuna
- Goniodoridella
- Goniodorididae
- Goniodoris
- Goodallia
- Goodingia
- Goslineria
- Goubinia
- Gouldia
- Gouldiopa
- Gourmya
- Goweroconcha
Gr
- Graciliclava
- Gradiconus
- Graecina
- Graecoanatolica
- Graecorientalia
- Granata
- Grandicrepidula
- Grandidieria
- Graneledone
- Granicorium
- Granigyra
- Granolaria
- Granosolarium
- Granotoma
- Granoturris
- Granula
- Granulifusus
- Granulina
- Granuliterebra
- Granulomelon
- Granulopsis
- Granulotriforis
- Graphicomassa
- Graphis
Graptacme Pilsbry & Sharp, 1897
- Graptacme acutissima (Watson, 1879)
- Graptacme acutistriata Steiner & Kabat, 2004
- Graptacme africana (G.B. Sowerby III, 1903)
- Graptacme calamus (Dall, 1889)
- Graptacme eborea (Conrad, 1846)
- Graptacme elpis (Winckworth, 1927)
- Graptacme inversa (Deshayes, 1825)
- Graptacme lactea (Deshayes, 1825)
- Graptacme marchadi (Nicklès, 1979)
- Graptacme multistricta (Finlay & Marwick, 1937) †
- Graptacme nielseni Lamprell & Healy, 1998
- Graptacme novaehollandiae (Chenu, 1843)
- Graptacme pareorensis (Pilsbry & Sharp, 1897) †
- Graptacme perlonga (Dall, 1881)
- Graptacme secta (Deshayes, 1825)
- Graptacme semistriata (Turton, 1819)
- Graptacme semistriolata (Guilding, 1834)
- Graptacme splendida (G. B. Sowerby I, 1832)
- Graptacme takakoae Tsuchida & Tachi, 1999
Mollusca → Scaphopoda → Dentaliida → Dentaliidae
- Gratilaoma
- Graziana
- Greenwoodoconcha
- Gregariella
- Gregorioiscala
- Grimpella
- Grimpoteuthidae
- Grimpoteuthis
- Grippina
- Grossuana
- Gryphaeidae
Gu
- Guadiella
- Gudeoconcha
- Guildfordia
- Guivillea
- Gumina
- Gundlachia
- Guraleus
- Gutturnium
- Guyvalvoria
Gy
- Gymnobela
- Gymnodorididae
- Gymnodoris
- Gymnomenia
- Gymnomeniidae
- Gymnosomata
- Gyraulus
- Gyrineum
- Gyrocochlea
- Gyropena
- Gyrotoma