- Guhsania, Genus Guhsania McLearn, 1926 † (SONNINIIDAE) (FOSSIL)
- Guianadesma, syn of: Genus Ostomya Conrad, 1874 † (LYONSIIDAE) (FOSSIL)
- guianensis, Leptadrillia guianensis P.J. Fallon, 2016 - (DRILLIIDAE)
- guianensis, Solariorbis guianensis C.O. Van Regteren Altena, 1966 - (TORNIDAE)
- guibali, Ammonites guibali Pia, 1914 † - (AMMONITIDA (unassigned)) (FOSSIL)
- guibalianum, Gleviceras guibalianum (d'Orbigny, 1844 †) - (OXYNOTICERATIDAE) (FOSSIL)
- guicciardii, Macedonica guicciardii (J.R. Roth, 1856) - (CLAUSILIIDAE)
- guicciardii oetensis, Macedonica guicciardii oetensis (C.A. Westerlund, 1901) - (CLAUSILIIDAE)
- guichardi, Lunulicardia guichardi A.C. Bernardi, 1857 - syn of: Lunulicardia hemicardium (C. Linnaeus, 1758) - (CARDIIDAE)
- guichemerri, Charonia guichemerri P. Lozouet, 1998 † - (RANELLIDAE) (FOSSIL)
- Guichiella, Genus Guichiella Li & Ding, 1981 † (PTERINEIDAE) (FOSSIL)
- guichiense, Bactroceras guichiense Ying, 1989 † - syn of: Bactroceras angustisiphonatum (Rüdiger, 1891 †) - (BALTOCERATIDAE) (FOSSIL)
- guichinense, Gangshanoceras guichinense Ying, 1989 † - (PROTEOCERATIDAE) (FOSSIL)
- guideloni, Cernuella guideloni J.R. Bourguignat in É.A.A. Locard, 1894 - syn of: Cernuella virgata (E.M. Da Costa, 1778) - (HYGROMIIDAE)
- guidingensis, Vishnuites guidingensis Zakharov & Mu, 2007 † - syn of: Vishnuites pralambha Diener, 1897 † - (OPHICERATIDAE) (FOSSIL)
- guidoi, Palmulacypraea katsuae guidoi (F.Jr. Lorenz, 2002) - (CYPRAEIDAE)
- guidoi, Dulcina guidoi R. von Cosel & P. Bouchet, 2008 - (LUCINIDAE)
- guidoi, Mactra guidoi J.H. Signorelli & F. Scarabino, 2010 - (MACTRIDAE)
- guidoi, Crenavolva guidoi D. Fehse, 2002 - (OVULIDAE)
- guidoi, Laevistrombus canarium guidoi (L.M. Man in't Veld & K. De Turck, 1998) - (STROMBIDAE)
- guidoni, Solatopupa guidoni (E. Caziot, 1904) - (CHONDRINIDAE)
- guidoni simonettae, Solatopupa guidoni simonettae (F.L. Giusti, 1970) - (CHONDRINIDAE)
- Guidonia, Genus Guidonia Stefani, 1880 † (TROCHONEMATIDAE) (FOSSIL)
- guidonii, Kammerkaroceras guidonii Sowerby, 1833 † - (PSILOCERATIDAE) (FOSSIL)
- guidonis, Fusinus guidonis A. Delsaerdt, 1995 - (FASCIOLARIIDAE)
- guidopoppei, Conasprella guidopoppei (L. Raybaudi Massilia, 2005) - (CONIDAE)
- guidopoppei, Fumiconus guidopoppei (L. Raybaudi Massilia, 2005) - syn of: Conasprella guidopoppei (L. Raybaudi Massilia, 2005) - (CONIDAE)
- guidopoppei, Mitra guidopoppei Thach, 2016 - (MITRIDAE)
- guidopoppei, Turris guidopoppei R.N. Kilburn, A.E. Fedosov & B.M. Olivera, 2012 - (TURRIDAE)
- guieui, Baqueina guieui J.J. Vermeulen & al., 2010 † - (ANAHAMULINIDAE) (FOSSIL)
- guifordia, Columbella guifordia A. Risso, 1826 - syn of: Columbella rustica (C. Linnaeus, 1758) - (COLUMBELLIDAE)
- guigouana, Autocoptis guigouana (S.A.A. Petit De La Saussaye, 1859) - (UROCOPTIDAE)
- guigouana strohmi, Autocoptis guigouana strohmi (S.A.A. Petit De La Saussaye, 1859) - (UROCOPTIDAE)
- guiielmi, Pseudoaluco guiielmi (Raincourt, 1877 †) - (CERITHIIDAE) (FOSSIL)
- Guildfordia, Genus Guildfordia J.E. Gray, 1850 (TURBINIDAE)
- guildfordiae, Tellina guildfordiae Gray in E. Griffith & E. Pidgeon, 1833 † - syn of: Megangulus luteus (W. Wood, 1828 †) - (TELLINIDAE) (FOSSIL)
- guildfordiae, Trochus guildfordiae L.A. Reeve, 1842 - syn of: Guildfordia triumphans (R.A. Philippi, 1841) - (TROCHIDAE)
- guildfordiae, Guildfordia guildfordiae L.A. Reeve, 1842 - syn of: Guildfordia triumphans (R.A. Philippi, 1841) - (TURBINIDAE)
- guildi, Trigonia guildi Stoyanow, 1949 † - (TRIGONIIDAE) (FOSSIL)
- guildingi, Atys guildingi G.B. II Sowerby, 1869 - (HAMINOEIDAE)
- guildingi, Happiella guildingi (T.B. Bland, 1865) - (SCOLODONTIDAE)
- guildingi, Macroceramus guildingi (L. Pfeiffer) - (UROCOPTIDAE)
- Guildingia, syn of: Genus Plaxiphora J.E. Gray, 1847 (MOPALIIDAE)
- guildingiana, Helicina guildingiana L. Pfeiffer, 1849 - syn of: Alcadia solitaria C.B. Adams, 1845 - (HELICINIDAE)
- guildingii, Bulla guildingii W.J. Swainson, 1840 - syn of: Haminoea elegans (J.E. Gray, 1825) - (BULLIDAE)
- guildingii, Ceratozona squalida guildingii (L.A. Reeve, 1847) - (CALLISTOPLACIDAE)
- guildingii, Chiton guildingii L.A. Reeve, 1847 - syn of: Ceratozona squalida guildingii (L.A. Reeve, 1847) - (CHITONIDAE)
- guildingii, Columbella guildingii G.B. I Sowerby, 1844 - syn of: Costoanachis hotessieriana (D'Orbigny, 1842) - (COLUMBELLIDAE)
- guildingii, Costoanachis guildingii G.W. Nowell-Usticke, 1969 - syn of: Costoanachis hotessieriana (D'Orbigny, 1842) - (COLUMBELLIDAE)
- guildingii, Melanella guildingii (A. Adams, 1854) - (EULIMIDAE)
- guildingii, Olivella guildingii (L.A. Reeve, 1850) - (OLIVELLIDAE)
- guildingii, Crassispira guildingii (L.A. Reeve, 1845) - (PSEUDOMELATOMIDAE)
- guildingii, Tellina guildingii (S.C.T. Hanley, 1844) - (TELLINIDAE)
- guildingii, Eurytellina guildingii S.C.T. Hanley, 1844 - syn of: Tellina guildingii (S.C.T. Hanley, 1844) - (TELLINIDAE)
- guildingii, Enaeta guildingii (G.B. I Sowerby, 1844) - (VOLUTIDAE)
- guildingii teres, Anachis guildingii teres G.W. Nowell-Usticke, 1969 - syn of: Costoanachis hotessieriana (D'Orbigny, 1842) - (COLUMBELLIDAE)
- guilfordia, Columbella guilfordia A. Risso, 1826 - syn of: Columbella rustica (C. Linnaeus, 1758) - (COLUMBELLIDAE)
- guilherandense, Schneidia guilherandense Atrops, 1982 † - (PERISPHINCTIDAE) (FOSSIL)
- Guilia, Subgenus Alabastrina (Guilia) P.M. Pallary, 1926 (HELICIDAE)
- guillaini, Buccinum guillaini S.A.A. Petit De La Saussaye, 1850 - syn of: Cyllene grayi L.A. Reeve, 1846 - (BUCCINIDAE)
- guillaini, Glabella guillaini S.A.A. Petit De La Saussaye, 1851 - syn of: Glabella obtusa (G.B. II Sowerby, 1846) - (MARGINELLIDAE)
- guillaini, Marginella guillaini S.A.A. Petit De La Saussaye, 1851 - syn of: Glabella obtusa (G.B. II Sowerby, 1846) - (MARGINELLIDAE)
- guillaini, Physa guillaini J.C.H. Crosse, 1868 - (PHYSIDAE)
- guillaini, Ligatella guillaini (S.A.A. Petit De La Saussaye, 1850) - (POMATIIDAE)
- guillaini, Anodonta guillaini C.A. Récluz, 1850 - syn of: Chambardia wahlbergi (C.F.F. von Krauss, 1848) - (UNIONIDAE)
- Guillainia, Genus Guillainia J.C.H. Crosse, 1884 (POMATIIDAE)
- guillainopsis, Georgia guillainopsis (J.R. Bourguignat, 1882) - (POMATIIDAE)
- guillainopsis, Rochebrunia guillainopsis S.A.A. Petit De La Saussaye, 1850 - syn of: Ligatella guillaini (S.A.A. Petit De La Saussaye, 1850) - (POMATIIDAE)
- guillami, Marginella guillami S.A.A. Petit De La Saussaye, 1851 - syn of: Glabella obtusa guillani S.A.A. Petit De La Saussaye, 1851 - (MARGINELLIDAE)
- guillani, Glabella obtusa guillani S.A.A. Petit De La Saussaye, 1851 - (MARGINELLIDAE)
- guillarmodi, Oxychona guillarmodi R.J. Shuttleworth, 1852 - syn of: Leptarionta guillarmodi (R.J. Shuttleworth, 1852) - (BULIMULIDAE)
- guillarmodi, Helix guillarmodi R.J. Shuttleworth, 1852 - syn of: Leptarionta guillarmodi (R.J. Shuttleworth, 1852) - (HELICIDAE)
- guillarmodi, Leptarionta guillarmodi (R.J. Shuttleworth, 1852) - (XANTHONYCHIDAE)
- Guillarmodia, Genus Guillarmodia F.C. Baker, 1941 (SPIRAXIDAE)
- guillaumei, Colpospira guillaumei T. Iredale, 1924 - (TURRITELLIDAE)
- guilleaumei, Ctenocolpus guilleaumei T. Iredale, 1924 - syn of: Colpospira guillaumei T. Iredale, 1924 - (TURRITELLIDAE)
- guillei, Antalis guillei V. Scarabino, 1995 - (DENTALIIDAE)
- guillei, Chicoreus guillei (R. Houart, 1985) - (MURICIDAE)
- guillei, Pterynotus guillei R. Houart, 1985 - syn of: Chicoreus guillei (R. Houart, 1985) - (MURICIDAE)
- guillei, Adeuomphalus guillei Y. Kano, E. Chikyu & A. Warén, 2009 - (SEGUENZIOIDEA (unassigned))
- guillemei, Vinundu guillemei (H. Martel & P. Dautzenberg, 1899) - (PALUDOMIDAE)
- guillemei, Tomichia guillemei E.H.J. Leloup, 1953 - (POMATIOPSIDAE)
- guillemeti, Unio guillemeti J.R. Bourguignat, 1886 - syn of: Coelatura horei (E.A. Smith, 1880) - (UNIONIDAE)
- guillemi, Turbonilla guillemi A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- guilleminii, Euspira guilleminii (B.C.M. Payraudeau, 1826) - (NATICIDAE)
- guilleni, Turbonilla guilleni P. Bartsch, 1917 - (PYRAMIDELLIDAE)
- guilleri, Cyclonema guilleri Barrois, 1889 † - (PLATYCERATIDAE) (FOSSIL)
- guillermi, Cerion mumiola guillermi C. de la Torre, 1954 - (CERIONIDAE)
- guillermi, Liguus fasciatus guillermi R.P. Guitart, 1943 - (ORTHALICIDAE)
- guilletmi, Liguus blainianus guilletmi R.P. Guitart, 1943 - (ORTHALICIDAE)
- guilliana, Anodonta guilliana I. Lea, 1852 - syn of: Chambardia wahlbergi (C.F.F. von Krauss, 1848) - (UNIONIDAE)
- guillieri, Australonema guillieri (Oehlert, 1877 †) - (ORIOSTOMATIDAE) (FOSSIL)
- guillieri, Cyclonema guillieri Oehlert, 1877 † - syn of: Australonema guillieri (Oehlert, 1877 †) - (PLATYCERATIDAE) (FOSSIL)
- guillieri, Proconulus guillieri (A.E.M. Cossmann, 1885 †) - (PROCONULIDAE) (FOSSIL)
- guillieri, Turbo guillieri Oehlert, 1877 † - syn of: Australonema guillieri (Oehlert, 1877 †) - (TURBINIDAE) (FOSSIL)
- guilonardi, Phaseolus guilonardi B.W. Hoeksema, 1993 - syn of: Microgloma guilonardi (B.W. Hoeksema, 1993) - (PHASEOLIDAE)
- guilonardi, Microgloma guilonardi (B.W. Hoeksema, 1993) - (YOLDIIDAE)
- guimarasensis, Cochlostyla ventricosa guimarasensis (W.J. Broderip, 1841) - (BRADYBAENIDAE)
- guimarasensis, Leptopoma nitidum guimarasensis P. Bartsch, 1918 - (CYCLOPHORIDAE)
- guimarensis, Ryssota sagittifera guimarensis (P. Bartsch, 1938) - (CHRONIDAE)
- guimeti, Xeropicta guimeti (J.R. Bourguignat, 1876) - (HYGROMIIDAE)
- guinaica, Limicolaria guinaica P.M.A. Morelet, 1890 - (ACHATINIDAE)
- guinaica, Gastrana guinaica L.W. Dillwyn, 1817 - syn of: Gastrana matadoa (J.F. Gmelin, 1791) - (TELLINIDAE)
- guinaica, Trapezium guinaica J.B.P.A. Lamarck, 1819 - syn of: Trapezium oblongum (C. Linnaeus, 1758) - (TRAPEZIDAE)
- guinaica, Voluta musica guinaica J.B.P.A. Lamarck, 1811 - (VOLUTIDAE)
- guinaicum, Cerithium guinaicum R.A. Philippi, 1849 - (CERITHIIDAE)
- guinaicus, Lanistes varicus guinaicus (J.B.P.A. Lamarck, 1816) - (AMPULLARIIDAE)
- guinaicus, Lautoconus guinaicus (C.H. Hwass in J.G. Bruguière, 1792) - (CONIDAE)
- guinaicus, Solen guinaicus R. von Cosel, 1993 - (SOLENIDAE)
- guineana, Dendrodoris guineana Á. Valdés & J.A. Ortea, 1996 - (DENDRODORIDIDAE)
- Guineana, Genus Guineana Skwarko, 1967 † (TRIGONIIDAE) (FOSSIL)
- guineensis, Bursatella leachii guineensis A. Bebbington, 1969 - (APLYSIIDAE)
- guineensis, Aloidis guineensis J.K. Megerle Von Mühlfeld, 1811 - syn of: Corbula sulcata J.B.P.A. Lamarck, 1801 - (CORBULIDAE)
- guineensis, Cuspidaria guineensis J. Knudsen, 1970 - (CUSPIDARIIDAE)
- guineensis, Amaea guineensis P. Bouchet & S. Tillier, 1978 - (EPITONIIDAE)
- guineensis, Haliotis guineensis J.F. Gmelin, 1791 - syn of: Haliotis marmorata C. Linnaeus, 1758 - (HALIOTIDAE)
- guineensis, Limopsis guineensis K.H.J. Thiele & S.G.A. Jaeckel, 1931 - syn of: Limopsis tenella J.G. Jeffreys, 1876 - (LIMOPSIDAE)
- guineensis, Pagodula guineensis (K.H.J. Thiele, 1925) - (MURICIDAE)
- guineensis, Purpura guineensis G.H. Schubert & J.A. Wagner, 1829 - syn of: Thaisella coronata (J.B.P.A. Lamarck, 1816) - (MURICIDAE)
- guineensis, Tugonia guineensis L.A. Reeve, 1863 - syn of: Tugonia anatina (J.F. Gmelin, 1791) - (MYIDAE)
- guineensis, Neilonella guineensis (K.H.J. Thiele, 1931) - (NEILONELLIDAE)
- guineensis, Brevinucula guineensis K.H.J. Thiele & S.G.A. Jaeckel, 1931 - syn of: Brevinucula verrilli (W.H. Dall, 1886) - (NUCULIDAE)
- guineensis, Onchidina guineensis (A. Labbé, 1934) - (ONCHIDIIDAE)
- guineensis, Ostrea guineensis R.W. Dunker, 1853 - syn of: Ostrea stentina B.C.M. Payraudeau, 1826 - (OSTREIDAE)
- guineensis, Patella guineensis J.F. Gmelin, 1791 - syn of: Cymbula safiana guineensis (J.F. Gmelin, 1791) - (PATELLIDAE)
- guineensis, Cymbula safiana guineensis (J.F. Gmelin, 1791) - (PATELLIDAE)
- guineensis, Gymnobela guineensis K.H.J. Thiele, 1925 - (RAPHITOMIDAE)
- guineensis, Pleurotomella guineensis E.C. Von Martens - syn of: Gymnobela frielei (A.E. Verrill, 1885) - (RAPHITOMIDAE)
- guineensis, Solen guineensis J.E. Gray, 1842 - syn of: Solen guinaicus R. von Cosel, 1993 - (SOLENIDAE)
- guineensis, Triplostephanus guineensis (P. Bouchet, 1983) - (TEREBRIDAE)
- guineensis, Cinguloterebra guineensis (P. Bouchet, 1983) - syn of: Triplostephanus guineensis (P. Bouchet, 1983) - (TEREBRIDAE)
- guineensis, Tindaria guineensis K.H.J. Thiele & S.G.A. Jaeckel, 1931 - syn of: Neilonella salicensis (G. Seguenza, 1877) - (TINDARIIDAE)
- guineensis, Clanculus guineensis (J.F. Gmelin, 1791) - (TROCHIDAE)
- guineensis, Venus guineensis J.F. Gmelin, 1791 - syn of: Lamelliconcha circinata (I. von Born, 1778) - (VENERIDAE)
- guineensis, Verticordia guineensis K.H.J. Thiele & S.G.A. Jaeckel, 1931 - (VERTICORDIIDAE)
- guineensis, Wareniconcha guineensis (K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (VESICOMYIDAE)
- guineensis, Vesicomya guineensis K.H.J. Thiele & S.G.A. Jaeckel, 1931 - syn of: Wareniconcha guineensis (K.H.J. Thiele & S.G.A. Jaeckel, 1931) - (VESICOMYIDAE)
- guineensis, Voluta guineensis L.W. Dillwyn, 1817 - syn of: Voluta musica C. Linnaeus, 1758 - (VOLUTIDAE)
- guineensis, Xylophaga guineensis J. Knudsen, 1961 - (XYLOPHAGAIDAE)
- guinenesis, Terebra guinenesis P. Bouchet, 1983 - syn of: Triplostephanus guineensis (P. Bouchet, 1983) - (TEREBRIDAE)
- guinensis, Sepioteuthis guinensis J.R.C. Quoy & J.P. Gaimard, 1832 - syn of: Sepioteuthis lessoniana R.P. Lesson, 1830 - (LOLIGINIDAE)
- guinensis, Mya guinensis L. Spengler, 1793 - syn of: Tugonia anatina (J.F. Gmelin, 1791) - (MYIDAE)
- guinensis, Tugonia guinensis L. Spengler, 1793 - syn of: Tugonia anatina (J.F. Gmelin, 1791) - (MYIDAE)
- guinensis, Tagelus guinensis J.E. Gray, 1847 - syn of: Tagelus adansonii (L.A.G. d'A. Bosc, 1801) - (SOLECURTIDAE)
- guiness, Elenaconcha guiness R. von Cosel & K. Olu, 2009 - (VESICOMYIDAE)
- Guiomarina, Genus Guiomarina Vermeulen & al., 2007 † (ANAHAMULINIDAE) (FOSSIL)
- guionetti, Siratus guionetti D. Merle, B. Garrigues & J. Pointier, 2001 - syn of: Siratus guionneti (D. Merle, B. Garrigues & J. Pointier, 2001) - (MURICIDAE)
- guionneti, Dentimargo guionneti T. Cossignani, 2001 - (MARGINELLIDAE)
- guionneti, Siratus guionneti (D. Merle, B. Garrigues & J. Pointier, 2001) - (MURICIDAE)
- guionneti, Lyria guionneti (G.T. Poppe & J. Conde, 2001) - (VOLUTIDAE)
- guionneti, Plicolyria guionneti G.T. Poppe & J. Conde, 2001 - syn of: Lyria guionneti (G.T. Poppe & J. Conde, 2001) - (VOLUTIDAE)
- guipuzcoa, Plesiella guipuzcoa H.D. Boeters, 2003 - (HYDROBIIDAE)
- guiraensis, Farcimen subventricosum guiraensis (C. de la Torre in L.O. Alcalde, 1948) - (MEGALOMASTOMIDAE)
- guirandi, Cerithium guirandi Loriol, 1887 † - syn of: Neocryptaulax guirandi (Loriol, 1887 †) - (CERITHIIDAE) (FOSSIL)
- guirandi, Neocryptaulax guirandi (Loriol, 1887 †) - (CRYPTAULACIDAE) (FOSSIL)
- guiraoanus, Iberus marmoratus guiraoanus E.A. Rossmässler, 1854 - (HELICIDAE)
- guiraoensis, Chondrina guiraoensis H.A. Pilsbry, 1918 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- guiraoi, Melanopsis guiraoi J.R. Bourguignat, 1884 - syn of: Melanopsis tricarinata dufourii (A.E.J. Férussac, 1823) - (MELANOPSIDAE)
- guiraonis, Chondrina guiraonis H.A. Pilsbry, 1918 - syn of: Chondrina farinesii C. des Moulins, 1835 - (CHONDRINIDAE)
- Guiratingia, Genus Guiratingia Petri & Fulfaro, 1966 † (MEGADESMIDAE) (FOSSIL)
- guirensis, Chondrothyrella assimilis guirensis C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- guirensis, Liocallonia guirensis (J. Gundlach in L. Pfeiffer, 1876) - (UROCOPTIDAE)
- guirensis, Urocoptis guirensis (J. Gundlach, 1863) - (UROCOPTIDAE)
- guiroai, Melanopsis guiroai (J.R. Bourguignat, 1868) - (MELANOPSIDAE)
- guisaense, Chondropoma guisaense C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- guisei, Proconulus guisei (J. Lycett, 1863 †) - (PROCONULIDAE) (FOSSIL)
- guisei, Trigonia guisei Lycett, 1883 † - (TRIGONIIDAE) (FOSSIL)
- guisgense, Chondropoma guisgense C. de la Torre & P. Bartsch, 1938 - syn of: Chondropoma guisaense C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- guishanensis, Gibbula guishanensis C. Chen & C.C. Fu, 2008 - (TROCHIDAE)
- guitarti, Cerithiopsis guitarti J. Espinosa & J.A. Ortea, 2001 - (CERITHIOPSIDAE)
- guitarti, Farcimen guitarti C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- guitarti, Annularia perezi guitarti (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- guitarti, Heterocoptis guitarti C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- guitarti, Torrecoptis longa guitarti C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- guitarti rugulosum, Farcimen guitarti rugulosum L.O. Alcalde, 1945 - (MEGALOMASTOMIDAE)
- guitiani, Manzonia guitiani E. Rolán, 1987 - (RISSOIDAE)
- guittoni, Monacha guittoni E. Caziot - syn of: Monacha cartusiana (O.F. Müller, 1774) - (HYGROMIIDAE)
- Guivillea, syn of: Genus Provocator R.B. Watson, 1882 (VOLUTIDAE)
- guixianensis, Pseudotirolites guixianensis J.K. Zhao & al., 1978 † - (PSEUDOTIROLITIDAE) (FOSSIL)
- guiyangense, Guiyangoceras guiyangense W.C. Zhou, 1985 † - (CYCLOLOBIDAE) (FOSSIL)
- guiyangense, Pleuronodoceras guiyangense J.K. Zhao & al., 1978 † - (PLEURONODOCERATIDAE) (FOSSIL)
- guiyangensis, Modiolus guiyangensis C. Chen, 1976 † - (MYTILIDAE) (FOSSIL)
- Guiyangoceras, Genus Guiyangoceras Zhou , 1985 † (CYCLOLOBIDAE) (FOSSIL)
- guizhouense, Pseudogastrioceras guizhouense J.K. Zhao & al., 1978 † - (PARAGASTRIOCERATIDAE) (FOSSIL)
- guizhouense, Rotodiscoceras guizhouense J.K. Zhao & al., 1978 † - (PLEURONODOCERATIDAE) (FOSSIL)
- guizhouense, Pentagonoceras guizhouense J.K. Zhao & al., 1978 † - (PLEURONODOCERATIDAE) (FOSSIL)
- guizhouense, Lirometacoceras guizhouense J.K. Zhao & al., 1978 † - (TAINOCERATIDAE) (FOSSIL)
- guizhouense, Nodopleuroceras guizhouense Zheng, 1984 † - (TAINOCERATIDAE) (FOSSIL)
- guizhouense, Tainoceras guizhouense Zheng, 1984 † - (TAINOCERATIDAE) (FOSSIL)
- guizhouensis, Towapteria guizhouensis Yin & Gan, 1978 † - (BAKEVELLIIDAE) (FOSSIL)
- guizhouensis, Bogoslovskya guizhouensis Niko, Nishida & Kyuma, 1997 † - (BOGOSLOVSKYIDAE) (FOSSIL)
- guizhouensis, Kokenospira guizhouensis Xi, 1974 † - (BUCANIIDAE) (FOSSIL)
- guizhouensis, Naticopsis guizhouensis Pan, 1982 † - (DELPHINULOPSIDAE) (FOSSIL)
- guizhouensis, Paratirolites guizhouensis Liang, 1983 † - (DZHULFITIDAE) (FOSSIL)
- guizhouensis, Risselloidea guizhouensis Yu & al., 1974 † - (EUCYCLIDAE) (FOSSIL)
- guizhouensis, Triassocirrus guizhouensis Yin & E.L. Yochelson, 1983 † - (EUOMPHALINA (unassigned)) (FOSSIL)
- guizhouensis, Euphemites guizhouensis Pan, 1982 † - syn of: Retispira guizhouensis (Pan, 1982 †) - (EUPHEMITIDAE) (FOSSIL)
- guizhouensis, Jieshaniceras guizhouensis (Zakharov & Mu, 2007 †) - (FLEMINGITIDAE) (FOSSIL)
- guizhouensis, Retispira guizhouensis (Pan, 1982 †) - (KNIGHTITIDAE) (FOSSIL)
- guizhouensis, Palaeoneilo guizhouensis C. Chen & T.C. Lan, 1976 † - (MALLETIIDAE) (FOSSIL)
- guizhouensis, Albanites guizhouensis J.K. Zhao & Wang, 1974 † - (MEEKOCERATIDAE) (FOSSIL)
- guizhouensis, Myophoriopis guizhouensis C. Chen, 1974 † - (MYOPHORICARDIIDAE) (FOSSIL)
- guizhouensis, Phestia guizhouensis F.S. Xu, 1980 † - syn of: Phestia zhejiangensis H.X. Liu, 1976 † - (NUCULANIDAE) (FOSSIL)
- guizhouensis, Wordieoceras guizhouensis Zakharov & Mu, 2007 - syn of: Jenneria pustulata (D.C. Solander, 1786) - (OPHICERATIDAE)
- guizhouensis, Parallelodon guizhouensis T.C. Lan & F.S. Xu, 1980 † - syn of: Parallelodon xijinwulanensis Sha, 1995 † - (PARALLELODONTIDAE) (FOSSIL)
- guizhouensis, Pernopecten guizhouensis F.S. Xu, 1976 † - (PERNOPECTINIDAE) (FOSSIL)
- guizhouensis, Chaenomya guizhouensis F.S. Xu, 1980 † - syn of: Chaenomya nuraensis Dickins, 1963 † - (PHOLADOMYIDAE) (FOSSIL)
- guizhouensis, Pteria guizhouensis C. Chen, 1976 † - (PTERIIDAE) (FOSSIL)
- guizhouensis, Leiopteria guizhouensis F.S. Xu & C.K. Chang, 1980 † - syn of: Leiopteria zhangi Li, 1995 † - (PTERINEIDAE) (FOSSIL)
- guizhouensis, Claraia guizhouensis C. Chen, 1964 † - (PTERINOPECTINIDAE) (FOSSIL)
- guizhouensis, Claraioides guizhouensis Y. Fang, 1993 † - syn of: Claraia shabaonica Yang & al., 2001 † - (PTERINOPECTINIDAE) (FOSSIL)
- guizhouensis, Wilkingia guizhouensis F.S. Xu, 1980 † - syn of: Wilkingia wyomingensis (R.M. Branson, 1930 †) - (SANGUINOLITIDAE) (FOSSIL)
- guizhouensis, Schizodus guizhouensis H.X. Liu & F.S. Xu, 1976 † - (SCHIZODIDAE) (FOSSIL)
- guizhouensis, Unionites guizhouensis C. Chen, 1976 † - (TRIGONODIDAE) (FOSSIL)
- guizhoui, Hologyra guizhoui Yin & E.L. Yochelson, 1983 † - (NATICOPSIDAE) (FOSSIL)
- Guizhouia, Genus Guizhouia Yin & Yochelson, 1983 † (PLEUROCERIIDAE) (FOSSIL)
- Guizhoumyophoria, Genus Guizhoumyophoria Fang, 2009 † (MYOPHORIIDAE) (FOSSIL)
- Guizhoupecten, Genus Guizhoupecten Chen, 1962 † (STREBLOCHONDRIIDAE) (FOSSIL)
- Guizhouspira, Genus Guizhouspira Wang , 1980 † (GOSSELETINIDAE) (FOSSIL)
- Guizospira, Genus Guizospira † (ARCHAEOGASTROPODA (unassigned)) (FOSSIL)
- gujaratensis, Aturia gujaratensis Halder, 2012 † - (ATURIIDAE) (FOSSIL)
- gujaratica, Sakuraeolis gujaratica W.B. Rudman, 1980 - (FACELINIDAE)
- Gujocardia, syn of: Genus Gujocardita Nakazawa & Newell, 1968 † (CARDITIDAE) (FOSSIL)
- Gujocardita, Genus Gujocardita Nakazawa & Newell, 1968 † (CARDITIDAE) (FOSSIL)
- gujoensis, Bakevellia gujoensis Nakazawa, 1959 † - (BAKEVELLIIDAE) (FOSSIL)
- gujoensis, Leptochondria gujoensis X.Z. Li, 1995 † - (LEIOPECTINIDAE) (FOSSIL)
- gujoensis, Tambanella gujoensis Nakazawa & Newell, 1968 † - (MALLEIDAE) (FOSSIL)
- Guladentia, Subgenus Cepolis (Guladentia) W.J. Clench & C.G. Aguayo, 1951 (CEPOLIDAE)
- gulaglandulata, Alexandromenia gulaglandulata L. Salvini-Plawén, 2008 - (AMPHIMENIIDAE)
- gularis, Delima gularis H.C. Küster, 1876 - syn of: Delima laevissima (E.A. Rossmässler, 1835) - (CLAUSILIIDAE)
- gularis, Ventridens gularis (T. Say, 1822) - (GASTRODONTIDAE)
- gularis, Orcula gularis E.A. Rossmässler, 1837 - (ORCULIDAE)
- gularis, Immersidens gularis F.G. Thompson & A. López, 1996 - (VERTIGINIDAE)
- gularis oreina, Orcula gularis oreina H.A. Pilsbry, 1934 - (ORCULIDAE)
- gulbini, Neptunea gulbini V.N. Goryachev & Y.I. Kantor, 1983 - (BUCCINIDAE)
- gulbini, Aulacofusus gulbini A. Kosyan & Y.I. Kantor, 2013 - (BUCCINIDAE)
- Gulbinia, syn of: Genus Corambe L.S.R. Bergh, 1869 (CORAMBIDAE)
- Gulbini-group, syn of: Genus Neptunea P.F. Röding, 1798 (BUCCINIDAE)
- guleensis, Daonella guleensis H. Guo, 1985 † - (DAONELLIDAE) (FOSSIL)
- Guleilmites, syn of: Genus Gulielmites Buckman, 1923 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- Guleimiceras, syn of: Subgenus Cosmoceras (Gulielmiceras) Buckman , 1920 † (KOSMOCERATIDAE) (FOSSIL)
- Gulella, Genus Gulella L. Pfeiffer, 1856 (STREPTAXIDAE)
- gulfensis, Sphenia gulfensis E.V. Coan, 1999 - (MYIDAE)
- Gulia, Genus Gulia F.P. Jousseaume, 1887 (CANCELLARIIDAE)
- gulicki, Euhadra eoa gulicki H.A. Pilsbry, 1928 - (BRADYBAENIDAE)
- gulicki, Discozonites gulicki H.A. Pilsbry, 1924 - (GASTRODONTIDAE)
- gulicki, Odostomia gulicki H.A. Pilsbry, 1918 - (PYRAMIDELLIDAE)
- Gulickia, Genus Gulickia C.M. Cooke, 1915 (ACHATINELLIDAE)
- gulickiana, Achatinella lehuiensis gulickiana H.A. Pilsbry & C.M. Cooke, 1914 - (ACHATINELLIDAE)
- gulickiana, Amastra gulickiana A. Hyatt & H.A. Pilsbry, 1911 - (AMASTRIDAE)
- gulickiana dichroma, Amastra gulickiana dichroma C.M. Cooke, 1933 - (AMASTRIDAE)
- gulickii, Achatinella apexfulva gulickii E.A. Smith, 1873 - (ACHATINELLIDAE)
- gulielmi, Venericardia gulielmi Gardner & E. Bowles, 1939 † - (CARDITIDAE) (FOSSIL)
- Gulielmiceras, Subgenus Cosmoceras (Gulielmiceras) Buckman , 1920 † (KOSMOCERATIDAE) (FOSSIL)
- gulielmii, Gulielmiceras gulielmii J. de C. Sowerby, 1821 † - syn of: Phlycticeras gulielmii (J. de C. Sowerby, 1821 †) - (KOSMOCERATIDAE) (FOSSIL)
- gulielmii, Phlycticeras gulielmii (J. de C. Sowerby, 1821 †) - (OPPELIIDAE) (FOSSIL)
- Gulielmina, Genus Gulielmina Buckman, 1925 † (KOSMOCERATIDAE) (FOSSIL)
- Gulielmites, Genus Gulielmites Buckman, 1923 † (MOLLUSCA INCERTAE SEDIS) (FOSSIL)
- gullei, Pseudamnicola gullei P. Glöer, M.Z. Yildirim & Ü. Kebapçi, 2015 - (HYDROBIIDAE)
- Gulnaria, syn of: Genus Radix P.D. Montfort, 1810 (LYMNAEIDAE)
- gulo, Vestia gulo (E.A. Bielz, 1859) - (CLAUSILIIDAE)
- gulo, Kaloplocamus gulo (Ev. Marcus, 1979) - (POLYCERIDAE)
- guloensis, Ptychites guloensis Tozer, 1994 † - (PTYCHITIDAE) (FOSSIL)
- gulosa, Badistes gulosa (A.A. Gould, 1846) - (CAMAENIDAE)
- gulosa, Threavia gulosa Lamont, 1946 † - (HOLOPEIDAE) (FOSSIL)
- gulosa, Amalda gulosa (C.A. Fleming, 1943 †) - (OLIVIDAE) (FOSSIL)
- gulosum, Caecum gulosum C. Hedley, 1899 - (CAECIDAE)
- gulosus, Discoscaphites gulosus (Morton, 1834 †) - (SCAPHITIDAE) (FOSSIL)
- gulsonae, Aclis gulsonae (W. Clark, 1850) - (ACLIDIDAE)
- gulsonae, Chemnitzia gulsonae W. Clark, 1850 - syn of: Aclis gulsonae (W. Clark, 1850) - (PYRAMIDELLIDAE)
- gulsonae tenuicula, Aclis gulsonae tenuicula J.G. Jeffreys, 1867 - syn of: Aclis gulsonae (W. Clark, 1850) - (ACLIDIDAE)
- gumalamala, Setobaudinia gumalamala F. Köhler, 2011 - (CAMAENIDAE)
- gumanomocon, Spondylus gumanomocon J. Brown & H.A. Pilsbry, 1913 † - (SPONDYLIDAE) (FOSSIL)
- gumbeli, Genuclymenia gumbeli Wedekind, 1908 † - syn of: Genuclymenia guembeli Wedekind, 1908 † - (CYMACLYMENIIDAE) (FOSSIL)
- gumbeli, Dimeroceras gumbeli Wedekind, 1908 † - syn of: Genuclymenia guembeli Wedekind, 1908 † - (DIMEROCERATIDAE) (FOSSIL)
- gumbinense, Lophospira gumbinense Saladzius, 1966 † - (LOPHOSPIRIDAE) (FOSSIL)
- gumia, Hinemoa gumia (C. Hedley, 1909) - (PYRAMIDELLIDAE)
- Gumina, Subgenus Odostomia (Gumina) H.J. Finlay, 1928 (PYRAMIDELLIDAE)
- gummatus, Megalobulimus gummatus (J.G. Hidalgo, 1870) - (MEGALOBULIMIDAE)
- gummea, Achatinella gummea J.T. Gulick, 1856 - syn of: Leptachatina gummea (J.T. Gulick, 1856) - (ACHATINELLIDAE)
- gummea, Leptachatina gummea (J.T. Gulick, 1856) - (AMASTRIDAE)
- gundershofensis, Dumortieria gundershofensis (Haug, 1887 †) - (HILDOCERATIDAE) (FOSSIL)
- gundlachi, Achatina gundlachi L. Pfeiffer, 1850 - syn of: Geostilba aperta (W.J. Swainson, 1840) - (ACHATINIDAE)
- gundlachi, Jeanneretia gundlachi W.J. Clench & C.G. Aguayo, 1951 - (CEPOLIDAE)
- gundlachi, Cerion gundlachi (L. Pfeiffer, 1852) - (CERIONIDAE)
- gundlachi, Drillia gundlachi W.H. Dall & C.T. Simpson, 1901 - syn of: Compsodrillia gundlachi (W.H. Dall & C.T. Simpson, 1901) - (DRILLIIDAE)
- gundlachi, Stenodrillia gundlachi W.H. Dall & C.T. Simpson, 1901 - syn of: Compsodrillia gundlachi (W.H. Dall & C.T. Simpson, 1901) - (DRILLIIDAE)
- gundlachi, Melampus gundlachi L. Pfeiffer, 1853 - syn of: Melampus bidentatus T. Say, 1822 - (ELLOBIIDAE)
- gundlachi, Guppya gundlachi (L. Pfeiffer, 1839) - (EUCONULIDAE)
- gundlachi, Cecilioides gundlachi L. Pfeiffer, 1850 - syn of: Geostilba aperta (W.J. Swainson, 1840) - (FERUSSACIIDAE)
- gundlachi, Helicina gundlachi L. Pfeiffer - syn of: Alcadia minima (D'Orbigny, 1842) - (HELICINIDAE)
- gundlachi, Farcimen gundlachi (L. Pfeiffer, 1856) - (MEGALOMASTOMIDAE)
- gundlachi, Murex gundlachi R.W. Dunker, 1883 - syn of: Siratus articulatus (L.A. Reeve, 1845) - (MURICIDAE)
- gundlachi, Crocidopoma gundlachi C. de la Torre & P. Bartsch, 1942 - (NEOCYCLOTIDAE)
- gundlachi, Varicella gundlachi (L. Pfeiffer, 1866) - (OLEACINIDAE)
- gundlachi, Wrightudora gundlachi (C. de la Torre & P. Bartsch, 1941) - (POMATIIDAE)
- gundlachi, Chondrothyretes gundlachi (R. Arango & Y. Molina, 1862) - (POMATIIDAE)
- gundlachi, Compsodrillia gundlachi (W.H. Dall & C.T. Simpson, 1901) - (PSEUDOMELATOMIDAE)
- gundlachi, Pisidium gundlachi T. Prime, 1870 - syn of: Pisidium consanguineum T. Prime, 1865 - (SPHAERIIDAE)
- gundlachi, Obeliscus gundlachi (L. Pfeiffer, 1863) - (SUBULINIDAE)
- gundlachi, Succinea gundlachi L. Pfeiffer, 1852 - (SUCCINEIDAE)
- gundlachi, Nephronaias gundlachi (R.W. Dunker, 1858) - (UNIONIDAE)
- gundlachi, Arangia gundlachi C. de la Torre & P. Bartsch, 1972 - (UROCOPTIDAE)
- gundlachi, Macroceramus gundlachi (L. Pfeiffer, 1852) - (UROCOPTIDAE)
- gundlachi anafense, Farcimen gundlachi anafense C. de la Torre, P. Bartsch & J.P.E. Morrison, 1942 - (MEGALOMASTOMIDAE)
- gundlachi bermudezi, Cerion gundlachi bermudezi C.G. Aguayo & M.L. Jaume, 1951 - (CERIONIDAE)
- gundlachi buidei, Cerion gundlachi buidei M.L. Jaume, 1984 - (CERIONIDAE)
- gundlachi deviata, Chondrothyretes gundlachi deviata (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- gundlachi dominguezi, Wrightudora gundlachi dominguezi C.G. Aguayo & M.L. Jaume, 1954 - (POMATIIDAE)
- gundlachi guanensis, Chondrothyretes gundlachi guanensis (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- gundlachi gundlachiellum, Farcimen gundlachi gundlachiellum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- gundlachi ignotum, Crocidopoma gundlachi ignotum C. de la Torre & P. Bartsch, 1942 - (NEOCYCLOTIDAE)
- gundlachi maritimum, Farcimen gundlachi maritimum L.O. Alcalde, 1946 - (MEGALOMASTOMIDAE)
- gundlachi michaeli, Farcimen gundlachi michaeli L.O. Alcalde, 1946 - (MEGALOMASTOMIDAE)
- gundlachi muraliensis, Chondrothyretes gundlachi muraliensis C. de la Torre & P. Bartsch, 1938 - syn of: Chondrothyretes gundlachi murallensis C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- gundlachi murallensis, Chondrothyretes gundlachi murallensis C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- gundlachi orosciana, Guppya gundlachi orosciana E.C. Von Martens, 1892 - (EUCONULIDAE)
- gundlachi pallidulum, Farcimen gundlachi pallidulum L.O. Alcalde, 1946 - (MEGALOMASTOMIDAE)
- gundlachi parvulum, Cerion gundlachi parvulum C.G. Aguayo & M.L. Jaume, 1951 - (CERIONIDAE)
- gundlachi porticola, Chondrothyretes gundlachi porticola (C. de la Torre & P. Bartsch, 1938) - (POMATIIDAE)
- gundlachi tantillum, Cerion gundlachi tantillum C.G. Aguayo & M.L. Jaume, 1951 - (CERIONIDAE)
- Gundlachia, Genus Gundlachia L. Pfeiffer, 1849 (PLANORBIDAE)
- gundlachiana, Zachrysia gundlachiana H.A. Pilsbry, 1928 - (CAMAENIDAE)
- gundlachiana, Tetrentodon gundlachiana (F. Poey, 1856) - (UROCOPTIDAE)
- gundlachiana garciai, Zachrysia gundlachiana garciai C.G. Aguayo & M.L. Jaume, 1957 - (CAMAENIDAE)
- gundlachiellum, Farcimen gundlachi gundlachiellum C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- gundlachii, Mytilopsis gundlachii R.W. Dunker, 1855 - syn of: Mytilopsis sallei (C.A. Récluz, 1849) - (DREISSENIDAE)
- gundlachii, Nodilittorina gundlachii R.A. Philippi, 1849 - syn of: Echinolittorina mespillum (J.K. Megerle Von Mühlfeld, 1824) - (LITTORINIDAE)
- gundlachii, Tegula gundlachii R.A. Philippi, 1849 - syn of: Tegula lividomaculata (C.B. Adams, 1845) - (TEGULIDAE)
- Gundlachtudora, Subgenus Abbottella (Gundlachtudora) C. de la Torre & P. Bartsch, 1941 (POMATIIDAE)
- Gundolficeras, Genus Gundolficeras Becker, 1995 † (TORNOCERATIDAE) (FOSSIL)
- gundrizeri, Lymnaea gundrizeri N.D. Kruglov & Y.I. Starobogatov, 1983 - (LYMNAEIDAE)
- gundyensis, Austroneilsonia gundyensis E.K. Yoo, 1988 † - (GOSSELETINIDAE) (FOSSIL)
- gundyensis, Knightella gundyensis (E.K. Yoo, 1994 †) - (ORTHONEMIDAE) (FOSSIL)
- gundyensis, Streptacis gundyensis E.K. Yoo, 1994 † - syn of: Knightella gundyensis (E.K. Yoo, 1994 †) - (STREPTACIDIDAE) (FOSSIL)
- gunensis, Discosorus gunensis Foerste, 1928 † - (DISCOSORIDAE) (FOSSIL)
- gunhildae, Leiostyla gunhildae R.B. Watson, 1887 - syn of: Leiostyla anglica (W. Wood, 1828) - (LAURIIDAE)
- gunnamatta, Dendrodoris gunnamatta J.K. Allan, 1932 - (DENDRODORIDIDAE)
- gunnamatta, Ctena gunnamatta T. Iredale, 1930 - (LUCINIDAE)
- gunnamatta, Chrysallida gunnamatta (C.F. Laseron, 1951) - (PYRAMIDELLIDAE)
- gunnari, Gunnarites gunnari Kilian & Reboul, 1925 † - (KOSSMATICERATIDAE) (FOSSIL)
- Gunnarites, Genus Gunnarites Kilian & Reboul, 1909 † (KOSSMATICERATIDAE) (FOSSIL)
- gunneri, Argonauta gunneri R.W. Dunker, 1852 - syn of: Argonauta argo C. Linnaeus, 1758 - (ARGONAUTIDAE)
- gunneri, Galeodea gunneri S.L. Lovén, 1846 - syn of: Galeodea echinophora (C. Linnaeus, 1758) - (CASSIDAE)
- gunneri, Boreotrophon clathratus gunneri (S.L. Lovén, 1846) - (MURICIDAE)
- gunneri coddi, Trophon gunneri coddi F.W. Harmer, 1918 - syn of: Boreotrophon clathratus (C. Linnaeus, 1767) - (MURICIDAE)
- gunnerusensis, Margarella gunnerusensis H. Numanami, 1996 - (CALLIOSTOMATIDAE)
- gunnerusensis, Margarites gunnerusensis H. Numanami, 1996 - (MARGARITIDAE)
- gunnessi, Halgerda gunnessi S.J. Fahey & T.M. Gosliner, 2001 - (DISCODORIDIDAE)
- gunni, Chitonellus gunni L.A. Reeve, 1847 - syn of: Cryptoplax striata (J.B.P.A. Lamarck, 1819) - (CRYPTOPLACIDAE)
- gunnii, Centrocardita gunnii (G.P. Deshayes, 1854) - (CARDITIDAE)
- gunnii, Austropyrgus gunnii (G.R. von Frauenfeld, 1863) - (HYDROBIIDAE)
- gunnii, Fluvidona gunnii G.R. von Frauenfeld, 1863 - syn of: Austropyrgus gunnii (G.R. von Frauenfeld, 1863) - (HYDROBIIDAE)
- gunnii, Gazameda gunnii (L.A. Reeve, 1849) - (TURRITELLIDAE)
- gunnii, Turritella gunnii L.A. Reeve, 1849 - syn of: Gazameda gunnii (L.A. Reeve, 1849) - (TURRITELLIDAE)
- gunnii brachysoma, Bothriembryon gunnii brachysoma H.A. Pilsbry, 1900 - syn of: Bothriembryon tasmanicus (L. Pfeiffer, 1853) - (BOTHRIEMBRYONTIDAE)
- gunningi, Sympolycyclus gunningi Tozer, 1994 † - (TRACHYCERATIDAE) (FOSSIL)
- gunteri, Anatoma gunteri (B.C. Cotton & F.C. Godfrey, 1933) - (ANATOMIDAE)
- gunteri, Schizotrochus gunteri B.C. Cotton & F.C. Godfrey, 1933 - syn of: Anatoma gunteri (B.C. Cotton & F.C. Godfrey, 1933) - (ANATOMIDAE)
- gunteri, Thieleella gunteri B.C. Cotton & F.C. Godfrey, 1933 - syn of: Anatoma gunteri (B.C. Cotton & F.C. Godfrey, 1933) - (ANATOMIDAE)
- gunteri, Strombina gunteri W.C. Mansfield, 1930 † - (COLUMBELLIDAE) (FOSSIL)
- gunteri, Papillina gunteri K.V.W. Palmer, 1953 † - (FASCIOLARIIDAE) (FOSSIL)
- gunteri, Dermomurex gunteri E.H. Vokes, 1985 - (MURICIDAE)
- gunteri, Nucinella gunteri W.C. Mansfield, 1932 † - (NUCINELLIDAE) (FOSSIL)
- gunteri, Thaumeledone gunteri C.W. Robson, 1930 - (OCTOPODIDAE)
- gunteri, Omanidacna gunteri (W.C. Mansfield, 1937 †) - (TRIDACNIDAE) (FOSSIL)
- gunteri, Blagraveia gunteri H.G. Richards, 1953 † - (VENERIDAE) (FOSSIL)
- guntheri, Thieleella guntheri B.C. Cotton & F.C. Godfrey, 1933 - syn of: Anatoma gunteri (B.C. Cotton & F.C. Godfrey, 1933) - (ANATOMIDAE)
- guntheri, Doris guntheri F.D. Abraham, 1876 - syn of: Calycidoris guentheri F.D. Abraham, 1876 - (DORIDIDAE)
- guntheri, Paramoria guntheri (E.A. Smith, 1886) - (VOLUTIDAE)
- guntheri adcocki, Paramoria guntheri adcocki (R. Tate, 1889) - (VOLUTIDAE)
- guntheri weaveri, Nannamoria guntheri weaveri D.F. McMichael, 1961 - syn of: Paramoria weaveri D.F. McMichael, 1961 - (VOLUTIDAE)
- guntingana, Helicostyla cincinniformis guntingana (P. Bartsch, 1932) - (BRADYBAENIDAE)
- gunyoungensis, Tucetona gunyoungensis (A.C. Chapman & F.A. Singleton, 1925 †) - (GLYCYMERIDIDAE) (FOSSIL)
- gunyoungensis, Lucina gunyoungensis G.B. Pritchard, 1903 † - (LUCINIDAE) (FOSSIL)
- Guodunites, Genus Guodunites Brayard & Bucher, 2008 † (PROPTYCHITIDAE) (FOSSIL)
- Guoia, Genus Guoia G.M. Davis & C. Chen, 1992 (POMATIOPSIDAE)
- guojiashanensis, Ananias guojiashanensis Tong & Erwin, 2001 † - (GOSSELETINIDAE) (FOSSIL)
- guormyi, Gourmya guormyi (J.C.H. Crosse, 1861) - (CERITHIIDAE)
- guphilae, Clathroterebra guphilae (G.T. Poppe, S.P. Tagaro & Y. Terryn, 2009) - (TEREBRIDAE)
- guphili, Calliostoma guphili G.T. Poppe, 2004 - (CALLIOSTOMATIDAE)
- guphili, Jujubinus guphili G.T. Poppe, S.P. Tagaro & H. Dekker, 2006 - (TROCHIDAE)
- guppiana, Stigmaulax guppiana F. Toula, 1909 † - (NATICIDAE) (FOSSIL)
- guppiana toulana, Stigmaulax guppiana toulana J. Gardner, 1937 † - (NATICIDAE) (FOSSIL)
- Guppya, Genus Guppya O.A.L. Mörch, 1867 (EUCONULIDAE)
- guppyana, Phalium guppyana C.J. Maury, 1912 † - (CASSIDAE) (FOSSIL)
- guppyana, Marginella guppyana W.C. Mansfield, 1925 † - (MARGINELLIDAE) (FOSSIL)
- guppyana, Natica guppyana F. Toula, 1909 † - (NATICIDAE) (FOSSIL)
- guppyana, Pleurotoma guppyana C.J. Maury, 1912 † - (TURRIDAE) (FOSSIL)
- guppyana, Chione guppyana C.J. Maury, 1912 † - (VENERIDAE) (FOSSIL)
- guppyana, Lamelliconcha guppyana (W.M. Gabb, 1881 †) - (VENERIDAE) (FOSSIL)
- guppyana, Pitar guppyana W.M. Gabb, 1881 † - syn of: Lamelliconcha guppyana (W.M. Gabb, 1881 †) - (VENERIDAE) (FOSSIL)
- guppyi, Pachycrommium guppyi (W.M. Gabb, 1873 †) - (AMPULLINIDAE) (FOSSIL)
- guppyi, Omphalotropis nebulosa guppyi W.J. Clench, 1958 - (ASSIMINEIDAE)
- guppyi, Placostylus guppyi E.A. Smith, 1891 - (BOTHRIEMBRYONTIDAE)
- guppyi, Metula guppyi A.A. Olsson & F.M. Bayer, 1972 - syn of: Bartschia guppyi (A.A. Olsson & F.M. Bayer, 1972) - (BUCCINIDAE)
- guppyi, Calliostoma guppyi W.P. Woodring, 1928 † - (CALLIOSTOMATIDAE) (FOSSIL)
- guppyi, Cancellaria guppyi W.M. Gabb, 1873 † - (CANCELLARIIDAE) (FOSSIL)
- guppyi, Americardia guppyi (K.H.J. Thiele, 1910) - (CARDIIDAE)
- guppyi, Ctenocardia guppyi (K.H.J. Thiele, 1910) - syn of: Americardia guppyi (K.H.J. Thiele, 1910) - (CARDIIDAE)
- guppyi, Glyphostoma guppyi W.P. Woodring, 1928 - (CLATHURELLIDAE)
- guppyi, Bartschia guppyi (A.A. Olsson & F.M. Bayer, 1972) - (COLUBRARIIDAE)
- guppyi, Spiralta guppyi (W.P. Woodring, 1928 †) - (COLUMBELLIDAE) (FOSSIL)
- guppyi, Conus guppyi W.P. Woodring, 1928 † - (CONIDAE) (FOSSIL)
- guppyi, Crassinella guppyi W.H. Dall, 1896 † - (CRASSATELLIDAE) (FOSSIL)
- guppyi, Manticoceras guppyi Glenister, 1958 † - (GEPHUROCERATIDAE) (FOSSIL)
- guppyi, Helicina guppyi W.H. Pease, 1871 - (HELICINIDAE)
- guppyi, Hyridella guppyi (E.A. Smith, 1885) - (HYRIIDAE)
- guppyi, Elimata guppyi Dickins, 1963 † - (LIMIDAE) (FOSSIL)
- guppyi, Ctena guppyi W.P. Woodring, 1925 † - (LUCINIDAE) (FOSSIL)
- guppyi, Tenaturris guppyi (W.H. Dall, 1896 †) - (MANGELIIDAE) (FOSSIL)
- guppyi, Modiolus guppyi W.H. Dall in W.P. Woodring, 1925 † - (MYTILIDAE) (FOSSIL)
- guppyi, Phos guppyi W.M. Gabb, 1873 † - (NASSARIIDAE) (FOSSIL)
- guppyi, Amauropsis guppyi W.M. Gabb, 1873 † - (NATICIDAE) (FOSSIL)
- guppyi, Lopha guppyi W.P. Woodring, 1925 † - (OSTREIDAE) (FOSSIL)
- guppyi, Plicatula guppyi W.P. Woodring, 1925 - syn of: Plicatula gibbosa J.B.P.A. Lamarck, 1801 - (PLICATULIDAE)
- guppyi, Cyclopecten guppyi W.H. Dall, 1898 † - (PROPEAMUSSIIDAE) (FOSSIL)
- guppyi, Pseudoliva guppyi W.C. Mansfield, 1925 † - (PSEUDOLIVIDAE) (FOSSIL)
- guppyi, Aartsenia guppyi (W.M. Gabb, 1873 †) - (PYRAMIDELLIDAE) (FOSSIL)
- guppyi, Ividella guppyi B.M. Landau & P.I. LaFollette, 2015 † - (PYRAMIDELLIDAE) (FOSSIL)
- guppyi, Ringicula guppyi W.H. Dall & W.C. Mansfield, 1930 † - (RINGICULIDAE) (FOSSIL)
- guppyi, Phosinella guppyi A.E.M. Cossmann, 1921 - syn of: Rissoina sagraiana A.V.M.D. D'Orbigny, 1842 - (RISSOINIDAE)
- guppyi, Cyclostremiscus guppyi (W.C. Mansfield, 1925 †) - (TORNIDAE) (FOSSIL)
- guppyi, Pusula guppyi F.A. Schilder, 1939 † - (TRIVIIDAE) (FOSSIL)
- guppyi, Turritella guppyi A.E.M. Cossmann, 1909 † - (TURRITELLIDAE) (FOSSIL)
- guppyi, Unio guppyi E.A. Smith, 1885 - syn of: Hyridella guppyi (E.A. Smith, 1885) - (UNIONIDAE)
- guppyi aipianus, Leiovirgus guppyi aipianus D.F. McMichael, 1956 - syn of: Hyridella guppyi (E.A. Smith, 1885) - (UNIONIDAE)
- gurabense, Cerithium gurabense C.J. Maury, 1917 † - (CERITHIIDAE) (FOSSIL)
- gurabensis, Sincola gurabensis (C.J. Maury, 1917 †) - (COLUMBELLIDAE) (FOSSIL)
- gurabensis, Uzita gurabensis (C.J. Maury, 1917 †) - (NASSARIIDAE) (FOSSIL)
- gurabensis, Euvola gurabensis Waller, 2011 † - (PECTINIDAE) (FOSSIL)
- gurabica, Lophocardium gurabica C.J. Maury, 1917 † - (CARDIIDAE) (FOSSIL)
- gurabicum, Vasum gurabicum C.J. Maury, 1917 † - (TURBINELLIDAE) (FOSSIL)
- gurabis, Ventrilia gurabis C.J. Maury, 1917 † - (CANCELLARIIDAE) (FOSSIL)
- gurabonicus, Monoplex gurabonicus C.J. Maury, 1917 † - (RANELLIDAE) (FOSSIL)
- gurabonis, Propustularia gurabonis W.M. Ingram, 1939 † - (CYPRAEIDAE) (FOSSIL)
- Guraleus, Genus Guraleus C. Hedley, 1918 (MANGELIIDAE)
- guranensis, Bythinella guranensis (A. Paladilhe, 1870) - (BYTHINELLIDAE)
- guranensis, Belgrandia guranensis A. Paladilhe, 1870 - syn of: Bythinella guranensis (A. Paladilhe, 1870) - (HYDROBIIDAE)
- guranensis engomerica, Bythinella guranensis engomerica H.D. Boeters & G. Falkner, 2008 - (BYTHINELLIDAE)
- gurgitis, Panopea gurgitis A. Brongniart, 1822 † - (HIATELLIDAE) (FOSSIL)
- gurgulio, Caecum gurgulio P.P. Carpenter, 1858 - (CAECIDAE)
- gurgustii, Rhynchotrochus gurgustii (J.C. Cox, 1879) - (CAMAENIDAE)
- gurianus, Valenciennius gurianus (V.V. Bogachev, 1931 †) - (LYMNAEIDAE) (FOSSIL)
- guribae, Volvarina guribae J.A. Ortea, 2014 - (MARGINELLIDAE)
- gurjanovae, Mysella gurjanovae O.A. Scarlato & I.N.V. Ivanova, 1974 - (MONTACUTIDAE)
- gurjanovae, Amicula gurjanovae A.M. Jakovleva, 1952 - (MOPALIIDAE)
- gurjanovae, Transkeia gurjanovae (I.P. Zorina, 1978) - (UNGULINIDAE)
- gurjanovi, Onchidiopsis gurjanovi K.M. Derjugin, 1937 - (VELUTINIDAE)
- Gurjanovillia, syn of: Subgenus Lepidozona (Tripoplax) S.S. Berry, 1919 (ISCHNOCHITONIDAE)
- gurleyi, Prolecanites gurleyi Smith, 1903 † - (PROLECANITIDAE) (FOSSIL)
- Gurleyites, Genus Gurleyites Mathews , 1929 † (PRIONITIDAE) (FOSSIL)
- Gurmatia, Genus Gurmatia S.P. Dance & F.E. Eames, 1966 † (PYRAMIDELLIDAE) (FOSSIL)
- gursi, Barleeia gursi P. Lozouet, 2015 - (BARLEEIIDAE)
- gurvichi, Pisidium gurvichi (Z.I. Izzatullaev & Y.I. Starobogatov, 1985) - (SPHAERIIDAE)
- gurvichi, Cyclocalyx gurvichi Z.I. Izzatullaev & Y.I. Starobogatov, 1985 - syn of: Pisidium gurvichi (Z.I. Izzatullaev & Y.I. Starobogatov, 1985) - (SPHAERIIDAE)
- gurvichi, Euglesa gurvichi Z.I. Izzatullaev & Y.I. Starobogatov, 1985 - syn of: Pisidium gurvichi (Z.I. Izzatullaev & Y.I. Starobogatov, 1985) - (SPHAERIIDAE)
- gusevi, Evenia gusevi A.G. Kuznetsov, 1973 † - syn of: Evenia lenaensis Voronetz, 1936 † - (ATOMODESMATIDAE) (FOSSIL)
- gusevi, Palaeomutela gusevi Kuloeva † - (PALAEOMUTELIDAE) (FOSSIL)
- guskovi, Atomodesma guskovi Astafieva, 1993 † - (ATOMODESMATIDAE) (FOSSIL)
- Gussonea, syn of: Genus Nassarius Duméril, 1805 (NASSARIIDAE)
- gussoni, Williamia gussoni (A. da Costa, 1829) - (SIPHONARIIDAE)
- gussoni, Williamia gussoni A. da Costa, 1829 - syn of: Williamia gussoni (A. da Costa, 1829) - (SIPHONARIIDAE)
- gussonii, Buccinum gussonii P. Calcara, 1845 † - syn of: Tritia tinei (C. Maravigna, 1840 †) - (BUCCINIDAE) (FOSSIL)
- gussonii, Ancylus gussonii A. da Costa, 1829 - syn of: Williamia gussoni (A. da Costa, 1829) - (PLANORBIDAE)
- gussonii, Spondylus gussonii A. da Costa, 1830 - (SPONDYLIDAE)
- gussonii major, Williamia gussonii major P.M. Pallary, 1900 - syn of: Williamia gussoni (A. da Costa, 1829) - (SIPHONARIIDAE)
- gussonii rubra, Williamia gussonii rubra P.M. Pallary, 1900 - syn of: Williamia gussoni (A. da Costa, 1829) - (SIPHONARIIDAE)
- gustafsoni, Doto gustafsoni H.M. Lemche - (DOTIDAE)
- gustafsoni, Fluminicola gustafsoni R. Hershler & H.P. Liu, 2012 - (LITHOGLYPHIDAE)
- gustavi, Ctenocardia gustavi E. Vidal & L. Kirkendale, 2007 - (CARDIIDAE)
- gustavi, Likharevia gustavi (O. Böttger, 1880) - (CLAUSILIIDAE)
- gustaviana, Corbicula gustaviana E.C. Von Martens, 1900 - (CYRENIDAE)
- gustaviensis, Murex gustaviensis G.W. Nowell-Usticke, 1969 - syn of: Vokesimurex woodringi (W.J. Clench & I. Pérez Farfante, 1945) - (MURICIDAE)
- gustavoi, Marginella gustavoi G. Pérez-Dionis, J.A. Ortea & J. Espinosa, 2009 - (MARGINELLIDAE)
- gustomesovi, Pseudodicoelites gustomesovi Sachs, 1975 † - (PSEUDODICOELITIDAE) (FOSSIL)
- guthriensis, Astartella guthriensis R.B. Newton, 1906 † - (ASTARTIDAE) (FOSSIL)
- gutiereziana, Fadyenia gutiereziana E. Chitty, 1857 - (HELICINIDAE)
- gutierrezi, Neniella gutierrezi J. Grego & M. Szekeres, 2004 - (CLAUSILIIDAE)
- gutierrezi, Pachydiscus gutierrezi Salazar & al., 2010 † - (DESMOCERATIDAE) (FOSSIL)
- gutierrezi, Emoda mayarina gutierrezi (C.G. Aguayo & M.L. Jaume, 1954) - (HELICINIDAE)
- gutierrezi, Farcimen bituberculatum gutierrezi C. de la Torre & P. Bartsch, 1942 - (MEGALOMASTOMIDAE)
- gutierrezi, Caracolus marginella gutierrezi (F. Poey, 1854) - (PLEURODONTIDAE)
- gutierrezi, Chondropoma gutierrezi (J. Gundlach in L. Pfeiffer, 1856) - (POMATIIDAE)
- gutierrezi, Turbonilla gutierrezi A. Peñas & E. Rolán, 2010 - (PYRAMIDELLIDAE)
- gutierrezi, Badiofaux gutierrezi (R. Arango, 1876) - (UROCOPTIDAE)
- gutierrezi negrosense, Chondropoma gutierrezi negrosense C. de la Torre & P. Bartsch, 1938 - (POMATIIDAE)
- Gutierrezium, Subgenus Chondropoma (Gutierrezium) M.L. Jaume, 1984 (POMATIIDAE)
- gutmansi, Bartlettia gutmansi F. Lange de Morretes, 1941 - syn of: Bartlettia stefanensis (S. Moricand, 1856) - (ETHERIIDAE)
- gutstadti, Prohungarites gutstadti Kummel, 1969 † - (SIBIRITIDAE) (FOSSIL)
- gutta, Neoclivunella gutta Kochansky-Devidé & Pikija, 1976 † - (CLAVATULIDAE) (FOSSIL)
- gutta, Plesiocystiscus gutta (S. Gofas & F. Fernandes, 1988) - (CYSTISCIDAE)
- gutta, Jaregoceras gutta P.A. Zhuravleva, 1972 † - syn of: Ukhtoceras uchtense (Holzapfel, 1899 †) - (DISCOSORIDA (unassigned)) (FOSSIL)
- gutta, Hydrocena gutta R.J. Shuttleworth, 1852 - (HYDROCENIDAE)
- gutta, Megastomia gutta A. Peñas & E. Rolán, 1999 - (PYRAMIDELLIDAE)
- gutta, Alvania gutta C. Tabanelli, Bongiardino & I. Perugia, 2011 † - (RISSOIDAE) (FOSSIL)
- gutta, Marshallora gutta F. Fernandes & E. Rolán, 1988 - (TRIPHORIDAE)
- Guttacypraea, syn of: Genus Notocypraea F.A. Schilder, 1927 (CYPRAEIDAE)
- guttadauri, Gibbula guttadauri (R.A. Philippi, 1836) - (TROCHIDAE)
- guttadauroi, Gibbula guttadauroi R.A. Philippi, 1836 - syn of: Gibbula guttadauri (R.A. Philippi, 1836) - (TROCHIDAE)
- guttarosea, Euchelus guttarosea W.H. Dall, 1889 - (CHILODONTIDAE)
- guttarus, Spondylus guttarus (Sharpe) † - (SPONDYLIDAE) (FOSSIL)
- guttata, Aplysia guttata G.O. Sars, 1840 - syn of: Aplysia punctata (G.L.C.F.D. Cuvier, 1803) - (APLYSIIDAE)
- guttata, Arene guttata J.H. McLean, 1970 - (ARENEIDAE)
- guttata, Mitrella guttata (G.B. I Sowerby, 1832) - (COLUMBELLIDAE)
- guttata, Mitrella guttata P. Bartsch & H.A. Rehder, 1939 - syn of: Mitrella elegans baileyi P. Bartsch & H.A. Rehder, 1939 - (COLUMBELLIDAE)
- guttata, Nitidella guttata sensu P. Bartsch & H.A. Rehder, 1939 - syn of: Mitrella guttata (G.B. I Sowerby, 1832) - (COLUMBELLIDAE)
- guttata, Alcira guttata (W.H. Turton, 1932) - syn of: Alcira elegans (H. Adams, 1861) - (COLUMBELLIDAE)
- guttata, Perisserosa guttata (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- guttata, Erosaria guttata J.F. Gmelin, 1791 - syn of: Perisserosa guttata (J.F. Gmelin, 1791) - (CYPRAEIDAE)
- guttata, Cypraea guttata J.B.P.A. Lamarck, 1810 - syn of: Cypraea pantherina J. Lightfoot, 1786 - (CYPRAEIDAE)
- guttata, Persicula guttata J.H.F. Link, 1807 - syn of: Persicula persicula (C. Linnaeus, 1758) - (CYSTISCIDAE)
- guttata, Dendrodoris guttata (N.H. Odhner, 1917) - (DENDRODORIDIDAE)
- guttata, Hoplodoris guttata A. Risso, 1826 - syn of: Hoplodoris grandiflora (W.H. Pease, 1860) - (DISCODORIDIDAE)
- guttata, Doris guttata A. Risso, 1826 - syn of: Dendrodoris grandiflora (J.L. Rapp, 1827) - (DORIDIDAE)
- guttata, Helix guttata E.J. Le Guillou, 1842 - (HELICIDAE)
- guttata, Assyriella guttata (G.A. Olivier, 1804) - (HELICIDAE)
- guttata, Nodilittorina guttata R.A. Philippi, 1847 - syn of: Echinolittorina meleagris (V.L.V. Potiez & A. Michaud, 1838) - (LITTORINIDAE)
- guttata, Prunum guttata L.W. Dillwyn, 1817 - syn of: Prunum guttatum (L.W. Dillwyn, 1817) - (MARGINELLIDAE)
- guttata, Mitra guttata W.J. Swainson, 1824 - (MITRIDAE)
- guttata, Neritina guttata C.A. Récluz, 1841 - syn of: Clithon oualaniensis (R.P. Lesson, 1831) - (NERITIDAE)
- guttata, Ancilla guttata F. Boyer, 2015 - (OLIVIDAE)
- guttata, Oliva guttata G. Fischer von Waldheim, 1807 - syn of: Oliva tessellata J.B.P.A. Lamarck, 1811 - (OLIVIDAE)
- guttata, Oliva guttata J.B.P.A. Lamarck, 1811 - syn of: Oliva maculata P.L. Duclos, 1835 - (OLIVIDAE)
- guttata, Patella guttata D'Orbigny, 1838 - syn of: Patella piperata A.A. Gould, 1846 - (PATELLIDAE)
- guttata, Phenacolepas guttata K.H.J. Thiele, 1909 - (PHENACOLEPADIDAE)
- guttata, Nembrotha guttata N. Yonow, 1993 - syn of: Nembrotha yonowae B.G. Goethel & H. Debelius, 1992 - (POLYCERIDAE)
- guttata, Terebra guttata (P.F. Röding, 1798) - (TEREBRIDAE)
- guttata, Bolma guttata (A. Adams, 1863) - (TURBINIDAE)
- guttata, Modelia guttata A. Adams, 1863 - syn of: Bolma guttata (A. Adams, 1863) - (TURBINIDAE)
- guttata, Callocardia guttata A. Adams, 1864 - (VENERIDAE)
- guttata, Amoria guttata D.F. McMichael, 1964 - (VOLUTIDAE)
- guttata, Voluta guttata L.W. Dillwyn, 1817 - syn of: Prunum guttatum (L.W. Dillwyn, 1817) - (VOLUTIDAE)
- guttata, Voluta guttata J.H.F. Link, 1807 - syn of: Pyramidella acus (J.F. Gmelin, 1791) - (VOLUTIDAE)
- guttata, Enaeta guttata L.A. Reeve, 1849 - syn of: Enaeta reevei (W.H. Dall, 1907) - (VOLUTIDAE)
- guttata azumai, Perisserosa guttata azumai F.A. Schilder, 1960 - (CYPRAEIDAE)
- guttata baileyi, Mitrella guttata baileyi P. Bartsch & H.A. Rehder, 1939 - syn of: Mitrella elegans baileyi P. Bartsch & H.A. Rehder, 1939 - (COLUMBELLIDAE)
- guttata bathyraphe, Bolma guttata bathyraphe E.A. Smith, 1899 - syn of: Bolma bathyraphis (E.A. Smith, 1899) - (TURBINIDAE)
- guttata bathyraphis, Bolma guttata bathyraphis E.A. Smith, 1899 - syn of: Bolma bathyraphis (E.A. Smith, 1899) - (TURBINIDAE)
- guttata bicallosa, Perisserosa guttata bicallosa G. Raybaudi Massilia, 1985 - (CYPRAEIDAE)
- guttata millegranosa, Bolma guttata millegranosa J.T. Kuroda & T. Habe in T. Habe, 1958 - syn of: Bolma millegranosa (J.T. Kuroda & T. Habe in T. Habe, 1958) - (TURBINIDAE)
- guttata surinensis, Perisserosa guttata surinensis (L. Raybaudi Massilia, 1978) - (CYPRAEIDAE)
- guttata surinensis bengalensis, Perisserosa guttata surinensis bengalensis L. Raybaudi Massilia, 1978 - (CYPRAEIDAE)
- guttata thorae, Callocardia guttata thorae E.H. Vokes, 1985 - (VENERIDAE)
- guttatum, Epitonium guttatum P.F. Röding, 1798 - syn of: Terebra guttata (P.F. Röding, 1798) - (EPITONIIDAE)
- guttatum, Prunum guttatum (L.W. Dillwyn, 1817) - (MARGINELLIDAE)
- guttatus, Scobinidola guttatus N.F. Sohl, 1963 † - (ACTEOCINIDAE) (FOSSIL)
- guttatus, Lissoacme guttatus (W.J. Broderip in W.J. Broderip & G.B. I Sowerby, 1832) - (BULIMULIDAE)
- guttatus, Conus guttatus L.C. Kiener, 1845 - syn of: Varioconus lineopunctatus (S.D. Kaicher, 1977) - (CONIDAE)
- guttatus, Cucullus guttatus P.F. Röding, 1798 - syn of: Pionoconus monachus (C. Linnaeus, 1758) - (CONIDAE)
- guttatus, Cyclotus guttatus L. Pfeiffer, 1846 - (CYCLOPHORIDAE)
- guttatus, Plakobranchus guttatus W. Stimpson, 1855 - syn of: Plakobranchus ocellatus (J.C. van Hasselt, 1824) - (PLAKOBRANCHIDAE)
- guttatus, Strombus guttatus L.A. Reeve, 1843 - syn of: Euprotomus bulla (P.F. Röding, 1798) - (STROMBIDAE)
- gutterosum, Bolloceras gutterosum (Barrande, 1865 †) - (NOTHOCERATIDAE) (FOSSIL)
- gutterosum, Phragmoceras gutterosum Barrande, 1865 † - syn of: Bolloceras gutterosum (Barrande, 1865 †) - (PHRAGMOCERATIDAE) (FOSSIL)
- Gutticonus, Genus Gutticonus Yue, 1984 † (MONOPLACOPHORA INCERTAE SEDIS) (FOSSIL)
- guttifera, Nicema guttifera Grzybowski, 1899 † - (PSEUDOLIVIDAE) (FOSSIL)
- guttoides, Sveltella guttoides Staadt in Cosmann & Pisarro, 1913 † - (CANCELLARIIDAE) (FOSSIL)
- guttula, Achatinella guttula A.A. Gould, 1847 - syn of: Leptachatina guttula (A.A. Gould, 1847) - (ACHATINELLIDAE)
- guttula, Leptachatina guttula (A.A. Gould, 1847) - (AMASTRIDAE)
- guttula, Brasilennea guttula R.B. Salvador & L.R.L. Simone, 2012 † - (CERIONIDAE) (FOSSIL)
- guttula, Laevozebrinus guttula (I.V. Muratov, 1992) - (ENIDAE)
- guttula, Limaria guttula R.N. Kilburn, 1998 - (LIMIDAE)
- guttula, Serrata guttula (G.B. I Sowerby, 1832) - (MARGINELLIDAE)
- guttula, Granulina guttula R. La Perna, 1999 - syn of: Granulina mediterranea B.M. Landau, R. La Perna & R. Marquet, 2006 - (MARGINELLIDAE)
- guttula, Volvarina guttula L.A. Reeve, 1865 - syn of: Volvarina southwicki (C.A. Davis, 1904) - (MARGINELLIDAE)
- guttula, Oliva guttula F.P. Marrat, 1871 - syn of: Oliva tricolor J.B.P.A. Lamarck, 1811 - (OLIVIDAE)
- guttula, Stenostylus guttula (L. Pfeiffer, 1854) - (ORTHALICIDAE)
- Guttula, Genus Guttula M.M. Schepman, 1908 (SEGUENZIIDAE)
- guttulata, Rissoina guttulata M.J. Faber, 2013 - (RISSOINIDAE)
- guttulata, Paphia guttulata P.F. Röding, 1798 - syn of: Tapes conspersus (J.F. Gmelin, 1791) - (VENERIDAE)
- guttulatus, Tapes literatus guttulatus (P.F. Röding, 1798) - (VENERIDAE)
- Gutturinium, Genus Gutturinium Mörch, 1853 † (RANELLIDAE) (FOSSIL)
- Gutturinum, syn of: Genus Gutturnium O.A.L. Mörch, 1852 (RANELLIDAE)
- gutturnia, Ranularia gutturnia (P.F. Röding, 1798) - (RANELLIDAE)
- gutturnia, Tudicla gutturnia P.F. Röding, 1798 - syn of: Ranularia gutturnia (P.F. Röding, 1798) - (TURBINELLIDAE)
- Gutturnium, Genus Gutturnium O.A.L. Mörch, 1852 (RANELLIDAE)
- gutturosa, Columbella gutturosa P.L. Duclos, 1840 - syn of: Metanachis jaspidea (G.B. II Sowerby, 1844) - (COLUMBELLIDAE)
- gutturosa, Zafrona gutturosa P.L. Duclos, 1835 - syn of: Metanachis jaspidea (G.B. II Sowerby, 1844) - (COLUMBELLIDAE)
- gutturosum, Chaetoderma gutturosum A. Kowalevsky, 1901 - syn of: Falcidens gutturosus (A. Kowalevsky, 1901) - (CHAETODERMATIDAE)
- gutturosus, Falcidens gutturosus (A. Kowalevsky, 1901) - (CHAETODERMATIDAE)
- guttuta, Cypraea guttuta A. Risso, 1826 - syn of: Cypraea pantherina J. Lightfoot, 1786 - (CYPRAEIDAE)
- guuibei, Euthria guuibei M.A. Peyrot, 1925 † - (BUCCINIDAE) (FOSSIL)
- guyana, Niveria guyana D. Fehse, 2016 - (TRIVIIDAE)
- guyanaensis, Mytella guyanaensis J.B.P.A. Lamarck, 1819 - syn of: Mytella guyanensis (J.B.P.A. Lamarck, 1819) - (MYTILIDAE)
- guyanensis, Pomacea guyanensis (J.B.P.A. Lamarck, 1822) - (AMPULLARIIDAE)
- guyanensis, Conasprella guyanensis (J.J. Van Mol, 1973) - (CONIDAE)
- guyanensis, Dalliconus guyanensis (J.J. Van Mol, 1973) - syn of: Conasprella guyanensis (J.J. Van Mol, 1973) - (CONIDAE)
- guyanensis, Fasciolaria guyanensis Lyons & Snyder, 2016 - (FASCIOLARIIDAE)
- guyanensis, Phyllonotus guyanensis B. Garrigues & Lamy, 2016 - (MURICIDAE)
- guyanensis, Mytella guyanensis (J.B.P.A. Lamarck, 1819) - (MYTILIDAE)
- guyanensis, Crassostrea guyanensis G. Ranson, 1967 - (OSTREIDAE)
- guyaquilensis, Hemisinus guyaquilensis L.A. Reeve, 1859 - syn of: Aylacostoma maculatum (I. Lea, 1832) - (THIARIDAE)
- guyenoti, Hydrobia guyenoti E.E. Binder, 1955 - (HYDROBIIDAE)
- Guyonia, syn of: Genus Doris C. Linnaeus, 1758 (DORIDIDAE)
- Guyvalvoria, Genus Guyvalvoria A.J.B.M. Vayssière, 1906 (FIONIDAE)
- guzhovi, Hoarechiton guzhovi B.I. Sirenko, 2013 † - (LEPTOCHITONIDAE) (FOSSIL)
- guzmani, Cornisepta guzmani J.F. Araya & D.L. Geiger, 2013 - (FISSURELLIDAE)
- guzmani, Onoba guzmani H.J. Hoenselaar & R.G. Moolenbeek, 1987 - (RISSOIDAE)
- guzzettii, Tibersyrnola guzzettii L. Bozzetti, 2007 - (PYRAMIDELLIDAE)
- Guzzyella, Genus Guzzyella Alencaster , 1998 † (CAPRINULOIDEIDAE) (FOSSIL)
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