Classification of Knight 1934

G. †Naticopsis M'Coy 1844
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†Naticopsis wortheniana Knight 1934
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Invalid names: Naticopsis wortheni Knight 1933 [replaced]
G. †Orthonychia Hall 1843
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†Orthonychia parva Shumard and Swallow 1858
G. †Orthonema Meek and Worthen 1862
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†Orthonema bilineatum Mark 1912
†Orthonema carbonarium Worthen 1884
†Orthonema conicum Meek and Worthen 1867
†Orthonema inornatum Knight 1934
†Orthonema liratum Sayre 1930
†Orthonema marvinwelleri Knight 1934
†Orthonema salteri Meek and Worthen 1860
†Orthonema sayrei Knight 1934
†Orthonema schucherti Knight 1934
†Orthonema werneri Knight 1934