Classification of the genus Sphenosphaera
G. †Sphenosphaera Knight 1945
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†Sphenosphaera bilineatus Ulrich and Scofield 1897
†Sphenosphaera burginensis Ulrich and Scofield 1897
†Sphenosphaera capax Ulrich and Scofield 1897
†Sphenosphaera centervillensis Foerste 1923
†Sphenosphaera consimilis Savage 1913
†Sphenosphaera eiseni Lindström 1884
†Sphenosphaera fiscellostriata Foerste 1887
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Invalid names: Sphenosphaera exigua Foerste 1887 [synonym]
†Sphenosphaera kepinensis Yü 1961
†Sphenosphaera laurentinus Twenhofel 1928
†Sphenosphaera mohri Miller 1874
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Invalid names: Bellerophon cincinnatiensis Miller and Faber 1894 [synonym], Bellerophon parksi Foerste 1924 [synonym]
†Sphenosphaera nana Ulrich and Scofield 1897
†Sphenosphaera opertus Foerste 1893
†Sphenosphaera platystoma Meek and Worthen 1868
†Sphenosphaera recurvus Ulrich and Scofield 1897
†Sphenosphaera rogersensis Foerste 1914
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Invalid names: Sphenosphaera clausus Ulrich and Scofield 1897 [replaced]
†Sphenosphaera similis Ulrich and Scofield 1897
†Sphenosphaera subangularis Ulrich and Scofield 1897
†Sphenosphaera subpatula Ulrich and Scofield 1897
†Sphenosphaera troosti de Ferrusac and d'Orbigny 1840