Classification of Grabau and Shimer 1909

G. †Cyrtolites Conrad 1838
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Cyrtolites carinatus Miller 1874
Cyrtolites ornatus Conrad 1838
G. †Helcionella Grabau and Shimer 1909
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Helcionella rugosa Hall 1847
G. †Bellerophon de Montfort 1808
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Bellerophon troosti de Ferrusac and d'Orbigny 1840
G. †Bucania Hall 1847
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Bucania halli Ulrich and Scofield 1897
Bucania punctifrons Emmons 1842
G. †Bucanopsis Ulrich and Scofield 1897
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Bucanopsis carinifera Ulrich and Scofield 1897
Bucanopsis leda Hall 1859
G. †Carinaropsis Hall 1847
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Carinaropsis cunulae Hall 1861
Carinaropsis cymbula Hall 1861
G. †Phragmolites Conrad 1838
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Phragmolites compressus Conrad 1838
Phragmolites dyeri Hall 1872
G. †Ptomatis Clarke 1899
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Ptomatis patulus Hall 1843
G. †Salpingostoma Roemer 1876
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Salpingostoma richmondensis Ulrich and Scofield 1897
G. †Tetranota Ulrich and Scofield 1897
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Tetranota bidorsata Hall 1847
Tetranota obsoleta Ulrich and Scofield 1897
Tetranota sexcarinata Ulrich and Scofield 1897
G. †Archinacella Ulrich and Scofield 1897
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Archinacella simulatrix Ulrich and Scofield 1897
G. †Holopea Hall 1847
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Holopea textilis Miller 1897
G. †Bembexia Oehlert and Oehlert 1888
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Bembexia sulcomarginata Conrad 1842
G. †Euconia Ulrich and Scofield 1897
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Euconia pervetusta Conrad 1838
G. †Euryzone Koken 1896
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Euryzone itys Hall 1876
G. †Gyroma Oehlert and Oehlert 1888
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Gyroma capillaria Conrad 1842
G. †Hormotomina Grabau and Shimer 1909
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Hormotomina maia Hall 1861
G. †Lophospira Whitfield 1886
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Lophospira helicteres Salter 1859
Lophospira trilix Hall 1862
Lophospira wisconsinensis Ulrich and Scofield 1897
G. †Platyceras Conrad 1840
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Platyceras erectum Hall 1843
G. †Trepospira Ulrich and Scofield 1897
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Trepospira rotalia Hall 1862
G. †Turbonopsis Grabau and Shimer 1909
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Turbonopsis shumardii Hall 1879
G. †Loxonema Phillips 1841
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Loxonema hamiltoniae Hall 1859
Loxonema terebra Hall 1879
G. †Reticularia Frederiks 1915
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G. †Diaphorostoma Fischer 1885
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Diaphorostoma lineatum Conrad 1842
G. †Sphaerodoma Keyes 1889
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G. †Oxydiscus Koken 1889
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Oxydiscus subacutus Ulrich and Scofield 1897
G. †Maclurina Ulrich and Scofield 1897
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Maclurina manitobensis Whiteaves 1890
G. †Palaeocapulus Grabau and Shimer 1909
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G. †Protowarthia Ulrich and Scofield 1897
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Protowarthia pervoluta Ulrich and Scofield 1897