Classification of Girty 1903

G. †Patellostium Waagen 1880
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†Patellostium ourayensis Gurley 1884
G. †Naticopsis M'Coy 1844
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†Naticopsis monilifera White 1880
G. †Platyceras Conrad 1840
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†Platyceras paralium White and Whitfield 1862
†Platyceras parvum Shumard and Swallow 1858
G. †Worthenia de Koninck 1883
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†Worthenia lasallensis Worthen 1890
G. †Acanthopecten Girty 1903
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G. †Myalina de Koninck 1842
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†Myalina arkansana Weller 1897
G. †Edmondia de Koninck 1841
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G. †Marginifera Waagen 1884
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†Marginifera muricata Norwood and Pratten 1855
G. †Pleurophorus King 1844
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†Pleurophorus subcostatus Meek and Worthen 1866