Classification of Schrammen 1912
G. Aphrocallistes Gray 1858
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†Aphrocallistes cylindrodactylus Schrammen 1912
†Aphrocallistes lobatus Schrammen 1912
G. †Craticularia Zittel 1877
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†Craticularia relicta Schrammen 1912
†Craticularia roemeri Schrammen 1912
†Craticularia virgatula Schrammen 1912
G. Farrea Bowerbank 1862
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†Farrea clarkei Schrammen 1912
†Farrea halli Schrammen 1912
G. †Polystigmatium Schrammen 1912
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†Polystigmatium striatopunctatum Schrammen 1912
G. Tretodictyum Schulze 1887
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†Tretodictyum loeschmanni Schrammen 1912
†Tretodictyum pfaffi Schrammen 1912
G. †Becksia Schlüter 1868
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†Becksia arborea Schrammen 1912
†Becksia crispata Quenstedt 1877
†Becksia feuerwehri Schrammen 1912
†Becksia nidiformis Leonhard 1897
G. †Cyclostigma Schrammen 1912
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†Cyclostigma lobata Schrammen 1912
†Cyclostigma maeandrina Schrammen 1912
G. †Hapalopegma Schrammen 1912
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†Hapalopegma fragilis Schrammen 1912
†Hapalopegma maeandrina Schrammen 1912
G. †Leiostracosia Schrammen 1902
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†Leiostracosia alcyonoides Mantell 1822
†Leiostracosia angustata Roemer 1841
†Leiostracosia brandesi Schrammen 1912
†Leiostracosia robusta Schrammen 1902
G. †Plectascus Schrammen 1912
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†Plectascus clathratus Roemer 1864
†Plectascus labrosus Smith 1848
G. †Plocoscyphia Reuss 1846
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†Plocoscyphia centuncula Schrammen 1912
†Plocoscyphia maaki Schrammen 1912
G. †Sporadoscinia Pomel 1872
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†Sporadoscinia quenstedti Schrammen 1912
†Sporadoscinia stirps Schrammen 1912
†Sporadoscinia teutoniae Schrammen 1912
G. †Toulminia Zittel 1877
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†Toulminia benettiae Mantell 1822
†Toulminia compressa Schrammen 1912
†Toulminia wollemanni Schrammen 1912
G. †Ventriculites Mantell 1822
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†Ventriculites cylindratus Schrammen 1912
†Ventriculites fistulosus Schrammen 1912
G. †Rhizopoterion Zittel 1877
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†Rhizopoterion solidum Schrammen 1912
†Rhizopoterion tubiforme Schrammen 1912
G. Periphragella Marshall 1875
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†Periphragella johannae Schrammen 1912
†Periphragella simplex Schrammen 1912
G. Chonelasma Schulze 1886
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†Chonelasma hindei Schrammen 1912
†Chonelasma punctata Schrammen 1912
G. †Stereochlamis Schrammen 1912
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†Stereochlamis caliculum Schrammen 1912
†Stereochlamis pilosa Schrammen 1912
†Stereochlamis praecissa Schrammen 1912
G. †Guettardia Michelin 1847
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†Guettardia bisalata Schrammen 1912
†Guettardia striata Schrammen 1912
G. †Pleurothyris Schrammen 1912
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†Pleurothyris folium Schrammen 1912
†Pleurothyris tortuosa Schrammen 1912
G. †Napaea Schrammen 1912
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†Napaea micropora Schrammen 1912
Invalid names: Eudictyon Schrammen 1902 [replaced]
G. †Actinocyclus Schrammen 1912
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†Actinocyclus alternans Roemer 1841
†Actinocyclus mirus Schrammen 1912
G. †Phalacrus Schrammen 1912
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†Phalacrus decurrens Schrammen 1912
†Phalacrus flosculus Schrammen 1912
†Phalacrus hemisphaericus Schrammen 1912
Invalid names: Ornatus [replaced]