Gafrarium minimum – synonym of Gouldia minima
Galiteuthis armatus – synonym of Galiteuthis armata
Galiteuthis suhmi – synonym of Galiteuthis armata
Galvina cingulata – synonym of Eubranchus cingulatus
Galvina exigua – synonym of Eubranchus exiguus
Galvina farrani – synonym of Eubranchus farrani
Galvina flava – synonym of Eubranchus farrani
Galvina flavescens – synonym of Eubranchus pallidus
Galvina pallida – synonym of Eubranchus pallidus
Galvina picta – synonym of Eubranchus pallidus
Galvina tricolor – synonym of Eubranchus tricolor
Galvina viridula – synonym of Eubranchus tricolor
Galvina vittata – synonym of Eubranchus vittatus
Gari vulgaris – synonym of Gari fervensis
Gastranella tumida – synonym of Petricola pholadiformis
Geitodoris reticulata – synonym of Geitodoris planata
Gibbula agathensis – synonym of Gibbula pennanti
Gibbula agathensis – synonym of Gibbula umbilicalis
Gibbula bellinii – synonym of Gibbula magus
Gibbula forskadauri – synonym of Gibbula magus
Gibbula magus var. turbinosa – synonym of Gibbula magus
Gibbula protumida – synonym of Gibbula magus
Gibbula tumida lusitanica – synonym of Gibbula tumida
Gibbula vulcanica – synonym of Gibbula magus
Glycimeris arctica – synonym of Panomya arctica
Glycimeris argentea – synonym of Nucula nucleus
Glycymeris orbicularis – synonym of Glycymeris glycymeris
Glycymeris wagenwoorti – synonym of Glycymeris glycymeris
Gobraeus variabilis – synonym of Gari depressa
Gonatus steenstrupi – synonym of Gonatus fabricii
Goniodoris barroisi – synonym of Goniodoris castanea
Goniodoris emarginata – synonym of Goniodoris nodosa
Gouldia minima var. citrina – synonym of Gouldia minima
Gouldia minima var. mirabilis – synonym of Gouldia minima
Gouldia minima var. penicillata – synonym of Gouldia minima
Gouldia minima var. rubicunda – synonym of Gouldia minima
Gouldia planata distantemlamellata – synonym of Gouldia minima
Gryphaea angulata – synonym of Crassostrea gigas
Gymnotoplax barashi – synonym of Pleurobranchus membranaceus