Classification of Williams 1963

G. †Dalmanella Hall and Clarke 1892
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†Dalmanella modica Williams 1963
G. †Dinorthis Hall and Clarke 1892
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†Dinorthis berwynensis Whittington 1938
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†Dinorthis flabellulum Sowerby and Murchison 1839
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G. †Howellites Bancroft 1945
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†Howellites ultima Bancroft 1945
G. †Nicolella Reed 1917
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†Nicolella actoniae de Sowerby and Murchison 1839
G. †Onniella Bancroft 1928
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†Onniella ostentata Williams 1963
G. †Reuschella Bancroft 1928
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†Reuschella horderleyensis Bancroft 1929
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G. †Skenidioides Schuchert and Cooper 1931
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†Skenidioides costatus Cooper 1956
G. †Bellimurina Cooper 1956
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†Bellimurina incommoda Williams 1963
G. †Eoplectodonta Kozlowski 1929
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†Eoplectodonta rhombica M'Coy 1852
G. †Glyptomena Cooper 1956
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†Glyptomena osloensis Spjeldnaes 1957
G. †Leptaena Dalman 1828
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†Leptaena salopiensis Williams 1963
†Leptaena ventricosa Williams 1963
G. †Leptestiina Opik 1933
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†Leptestiina oepiki Whittington 1938
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†Macrocoelia expansa de Sowerby and Murchison 1839
†Macrocoelia prolata Williams 1963
G. †Sowerbyella Jones 1928
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†Sowerbyella musculosa Williams 1963
G. †Strophomena Rafinesque and De Blainville 1824
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†Strophomena grandis de Sowerby and Murchison 1839
†Sowerbyella sericea Sowerby 1839
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Subg. †Sowerbyella (Sowerbyella) Jones 1928
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