Classification of the genus Laevityphis
Subg. †Siphonochelus (Laevityphis) Cossmann 1903
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Subg. Laevityphis (Laevityphis) Cossmann 1903
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†Laevityphis (Laevityphis) ludbrookae Keen and Campbell 1964
†Siphonochelus (Laevityphis) bullisi Gertman 1969
†Siphonochelus (Laevityphis) costaricensis Olsson 1922
†Siphonochelus (Laevityphis) curvirostratus Conrad 1848
†Siphonochelus (Laevityphis) gracilis Conrad 1833
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Invalid names: Typhis (Typhina) alternata Lea 1833 [synonym]
†Siphonochelus (Laevityphis) linguiferus Dall 1890
†Siphonochelus (Laevityphis) muticus Sowerby 1834
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Invalid names: Typhis coronarius Deshayes 1865 [synonym]
†Siphonochelus (Laevityphis) sawkinsi Mansfield 1925
†Siphonochelus (Laevityphis) schencki Keen and Campbell 1964
†Typhis (Laevityphis) thagus Olsson 1930
Invalid names: Typhis (Neotyphis) Vella 1961 [synonym]