Classification of Gabb 1864
G. †Trochosmilia Milne-Edwards and Haime 1848
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Subg. †Trochosmilia (Ellipsosmilia) d'Orbigny 1849
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†Trochosmilia (Ellipsosmilia) granulifera Gabb 1864
G. Dentalium Linnaeus 1758
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†Dentalium cooperi Gabb 1864
†Dentalium pusillum Gabb 1864
†Dentalium stramineum Gabb 1864
G. Helcion Montfort 1810
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†Helcion circularis Gabb 1864
†Helcion dichotoma Gabb 1864
G. †Straparollus de Montfort 1810
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†Straparollus lens Gabb 1864
†Straparollus paucivolvus Gabb 1864
G. Amauropsis Mörch 1857
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†Amauropsis alveata Conrad 1855
†Amauropsis oviformis Gabb 1864
G. Aporrhais da Costa 1778
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†Aporrhais angulata Gabb 1864
†Aporrhais californica Gabb 1864
†Aporrhais exilis Gabb 1864
†Aporrhais falciformis Gabb 1864
G. Lunatia Gray 1847
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†Lunatia avellana Gabb 1864
†Lunatia hornii Gabb 1864
†Lunatia nuciformis Gabb 1864
†Lunatia shumardiana Gabb 1864
G. †Margaritella Meek and Hayden 1860
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†Margaritella crenulata Gabb 1864
†Margaritella globosa Gabb 1864
G. †Perissolax Gabb 1861
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†Perissolax blakei Conrad 1855
†Perissolax brevirostris Gabb 1864
G. †Potamides Brongniart 1810
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†Potamides diadema Gabb 1864
†Potamides tenuis Gabb 1864
G. †Pugnellus Conrad 1860
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†Pugnellus hamulus Gabb 1864
†Pugnellus manubriatus Gabb 1864
G. Rostellaria Lamarck 1799
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Subg. †Rostellaria (Rimella) Agassiz 1840
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†Rostellaria (Rimella) canalifera Gabb 1864
†Rostellaria (Rimella) simplex Gabb 1864
G. Scalaria Lamarck 1801
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G. Turritella Lamarck 1799 [turret shell]
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†Turritella infralineata Gabb 1864
†Turritella robusta Gabb 1864
†Turritella saffordii Gabb 1860
†Turritella seriatimgranulata Roemer 1849
†Turritella uvasana Conrad 1855
†Turritella veatchii Gabb 1864
G. Fasciolaria Lamarck 1799 [tulip snail]
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†Fasciolaria io Gabb 1864
†Fasciolaria laeviuscula Gabb 1864
†Fasciolaria sinuata Gabb 1864
G. Fusus Bruguière 1789
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Subg. Fusus (Hemifusus) Swainson 1840
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†Fusus (Hemifusus) cooperii Gabb 1864
†Fusus (Hemifusus) hornii Gabb 1864
†Fusus (Hemifusus) remondii Gabb 1864
†Fusus aratus Gabb 1864
†Fusus averillii Gabb 1864
†Fusus californicus Conrad 1855
†Fusus diaboli Gabb 1864
†Fusus kingii Gabb 1864
†Fusus martinez Gabb 1864
†Fusus mathewsonii Gabb 1864
G. Neptunea Röding 1798
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†Neptunea curvirostris Gabb 1864
†Neptunea gracilis Gabb 1864
†Neptunea hoffmannii Gabb 1864
†Neptunea perforata Gabb 1864
†Neptunea ponderosa Gabb 1864
†Neptunea supraplicata Gabb 1864
G. Pseudoliva Swainson 1840
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†Pseudoliva lineata Gabb 1864
†Pseudoliva volutaeformis Gabb 1864
G. †Acteonina d'Orbigny 1850
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†Acteonina californica Gabb 1864
†Acteonina pupoides Gabb 1864
G. †Cinulia Gray 1847
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†Cinulia mathewsonii Gabb 1864
†Cinulia obliqua Gabb 1864
†Cinulia pinguis Gabb 1864
G. Architectonica Röding 1798 [sundial]
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†Architectonica cognata Gabb 1864
†Architectonica hornii Gabb 1864
†Architectonica inornata Gabb 1864
†Architectonica veatchii Gabb 1864
G. †Crioceras d'Orbigny 1842
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†Crioceras latus Gabb 1864
†Crioceras percostatus Gabb 1864
†Crioceras remondi Gabb 1864
G. †Ptychoceras d'Orbigny 1842
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†Ptychoceras aequicostatus Gabb 1864
†Ptychoceras quadratus Gabb 1864
G. Arca Linnaeus 1758 [ark]
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†Arca breweriana Gabb 1864
†Arca decurtata Gabb 1864
†Arca gravida Gabb 1864
†Arca hornii Gabb 1864
G. Cucullaea Lamarck 1801
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†Cucullaea mathewsonii Gabb 1864
†Cucullaea truncata Gabb 1864
G. Mytilus Linnaeus 1758
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†Mytilus ascia Gabb 1864
†Mytilus pauperculus Gabb 1864
G. Ostrea Linnaeus 1758
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†Ostrea brewerii Gabb 1864
†Ostrea malleiformis Gabb 1864
G. Pecten Müller 1776
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†Pecten californicus Gabb 1864
†Pecten operculiformis Gabb 1864
†Pecten traskii Gabb 1864
G. Anatina Schumacher 1817
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†Anatina inequilateralis Gabb 1864
†Anatina lata Gabb 1864
†Anatina tryoniana Gabb 1864
G. Astarte Sowerby 1816
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†Astarte conradiana Gabb 1864
†Astarte mathewsonii Gabb 1864
†Astarte tuscana Gabb 1864
G. Cardita Bruguière 1792
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†Cardita hornii Gabb 1864
†Cardita veneriformis Gabb 1864
G. Cardium Linnaeus 1758
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†Cardium brewerii Gabb 1864
†Cardium cooperii Gabb 1864
†Cardium remondianum Gabb 1864
G. †Crassatella Lamarck 1799
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†Crassatella grandis Gabb 1864
†Crassatella uvasana Conrad 1855
G. Dosinia Scopoli 1777
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†Dosinia elevata Gabb 1864
†Dosinia gyrata Gabb 1864
†Dosinia inflata Gabb 1864
†Dosinia pertenuis Gabb 1864
G. Lucina Bruguière 1797
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†Lucina cretacea Gabb 1864
†Lucina cumulata Gabb 1864
†Lucina nasuta Gabb 1864
†Lucina postradiata Gabb 1864
†Lucina subcircularis Gabb 1864
G. †Meekia Gabb 1864
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†Meekia navis Gabb 1864
†Meekia radiata Gabb 1864
†Meekia sella Gabb 1864
G. Meretrix Lamarck 1799
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†Meretrix arata Gabb 1864
†Meretrix californica Conrad 1855
†Meretrix hornii Gabb 1864
†Meretrix lens Gabb 1864
†Meretrix longa Gabb 1864
†Meretrix nitida Gabb 1864
†Meretrix ovalis Gabb 1864
†Meretrix uvasana Conrad 1855
G. Tapes Mühlfeld 1811
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†Tapes conradiana Gabb 1864
†Tapes cretacea Gabb 1864
†Tapes quadrata Gabb 1864
G. Tellina Linnaeus 1758
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†Tellina ashburnerii Gabb 1864
†Tellina californica Gabb 1864
†Tellina decurtata Gabb 1864
†Tellina hoffmanniana Gabb 1864
†Tellina hornii Gabb 1864
†Tellina longa Gabb 1864
†Tellina mathewsonii Gabb 1864
†Tellina monilifera Gabb 1864
†Tellina ooides Gabb 1864
†Tellina parilis Gabb 1864
†Tellina quadrata Gabb 1864
†Tellina remondii Gabb 1864
G. Venus Linnaeus 1758
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†Venus lenticularis Gabb 1864
†Venus tetrahedra Gabb 1864
†Venus veatchii Gabb 1864
G. Corbula Bruguière 1789
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†Corbula cultriformis Gabb 1864
†Corbula hornii Gabb 1864
†Corbula parilis Gabb 1864
†Corbula primorsa Gabb 1864
†Corbula traskii Gabb 1864
G. Pholadomya Sowerby 1823
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†Pholadomya brewerii Gabb 1864
†Pholadomya nasuta Gabb 1864
G. †Ammonites Bruguière 1789
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†Ammonites batesii Trask 1855
†Ammonites brewerii Gabb 1864
†Ammonites chicoensis Trask 1856
†Ammonites cooperii Gabb 1864
†Ammonites haydenii Gabb 1864
†Ammonites hoffmannii Gabb 1864
†Ammonites newberryanus Meek 1858
†Ammonites ramosus Meek 1864
†Ammonites remondii Gabb 1864
†Ammonites subtricarinatus d'Orbigny 1850
†Ammonites traskii Gabb 1864
G. Modiola Lamarck 1801
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†Modiola cylindrica Gabb 1864
†Modiola ornata Gabb 1864
†Modiola siskiyouensis Gabb 1864
Subg. Venus (Mercenaria) Schumacher 1817 [quahog]
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†Venus (Mercenaria) varians Gabb 1864
G. Tritonium Röding 1798
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†Tritonium diegoensis Gabb 1864
†Tritonium hornii Gabb 1864
†Tritonium paucivaricatum Gabb 1864
†Tritonium whitneyi Gabb 1864
G. Morio Montfort 1810
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G. †Helicoceras d'Orbigny 1840
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†Helicoceras brewerii Gabb 1864
†Helicoceras declive Gabb 1864
†Helicoceras vermicularis Gabb 1864