Classification of Foerste 1923
G. †Onychochilus Lindström 1884
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†Onychochilus abruptum Foerste 1893
†Onychochilus reticulatum Lindström 1884
G. †Bellerophon de Montfort 1808
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†Bellerophon centervillensis Foerste 1923
†Bellerophon recurvus Ulrich and Scofield 1897
†Bellerophon troosti de Ferrusac and d'Orbigny 1840
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†Bellerophon troosti burginensis Ulrich and Scofield 1897
G. †Cyclonema Hall 1852
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†Cyclonema bilix Conrad 1842
†Cyclonema daytonensis Foerste 1899
†Cyclonema fluctuatum James 1871
†Cyclonema gyronemoides Foerste 1923
G. †Straparollus de Montfort 1810
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†Straparollus hippolyta Billings 1865
†Straparollus mopsus Hall 1868
†Straparollus paveyi Foerste 1923
†Straparollus pervetusta Conrad 1838
G. †Coelocaulus Oehlert and Oehlert 1888
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†Coelocaulus oehlerti Ulrich and Scofield 1897
G. †Liospira Ulrich and Scofield 1897
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†Liospira depressum Foerste 1923
†Liospira micula Hall and Whitney 1862
G. †Lophospira Whitfield 1886
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Subg. †Lophospira (Ruedemannia) Foerste 1914
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†Lophospira (Ruedemannia) centervillensis Foerste 1923
†Lophospira bowdeni Safford 1869
†Lophospira bucheri Foerste 1923
†Lophospira ehlersi Foerste 1923
†Lophospira peracuta Ulrich and Scofield 1897
†Lophospira producta Ulrich and Scofield 1897
†Lophospira sumnerensis Safford 1869
†Lophospira trochonemoides Ulrich and Scofield 1897
G. †Ruedemannia Foerste 1914
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†Ruedemannia inexpectans Hall and Whitfield 1875
†Ruedemannia lirata Ulrich and Scofield 1897
†Ruedemannia robusta Lindström 1884
G. †Diaphorostoma Fischer 1885
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†Diaphorostoma daytonense Foerste 1923
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Invalid names: Diaphorostoma niagarense Foerste 1887 [replaced]
†Diaphorostoma niagarense Hall 1852
G. †Cryptaulus Foerste 1923
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†Cryptaulus aequilatera Wahlenberg 1821
†Cryptaulus filitexta Foerste 1893
†Cryptaulus helicinia Lindström 1884
Subg. †Murchisonia (Hormotoma) Salter 1859
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†Hormotoma gracilis Hall 1847
†Hormotoma salteri Ulrich and Scofield 1897
†Hormotoma subangulata Ulrich and Scofield 1897
†Hormotoma subulata Conrad 1842
G. †Hormotoma Salter 1859
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†Hormotoma canadensis Ulrich and Scofield 1897
†Hormotoma centervillensis Foerste 1923
†Hormotoma trilineata Foerste 1923