Classification of the genus Gaudryceras
G. †Gaudryceras de Grossouvre 1894
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Subg. †Gaudryceras (Gaudryceras) de Grossouvre 1894
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†Gaudryceras (Gaudryceras) cassisianum d'Orbigny 1850
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Invalid names: Gaudryceras salinarium Douville 1931 [synonym]
†Gaudryceras (Gaudryceras) denmanense Whiteaves 1903
†Gaudryceras (Gaudryceras) denseplicatum Jimbo 1894
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Invalid names: Gaudryceras vascogoticum Wiedmann 1962 [synonym], Lytoceras (Gaudryceras) amapondense van Hoepen 1920 [synonym]
†Gaudryceras (Gaudryceras) isovokyense Collignon 1964
†Gaudryceras (Gaudryceras) strictum Kennedy et al. 2007
†Gaudryceras (Gaudryceras) varicostatum van Hoepen 1921
†Gaudryceras aenigma Haas 1942
†Gaudryceras beantalyense Collignon 1956
†Gaudryceras crassicostatum Jimbo 1894
†Gaudryceras hobetsense Shigeta and Nishimura 2013
†Gaudryceras izumiense Matsumoto and Morozumi 1981
†Gaudryceras kayei Forbes 1846
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Invalid names: Lytoceras (Gaudryceras) birkhauseri Anderson 1958 [synonym], Lytoceras (Gaudryceras) coalingense Anderson 1958 [synonym]
†Gaudryceras makarovense Shigeta and Maeda 2005
†Gaudryceras numidum Coquand 1890
†Gaudryceras propemite Marshall 1926
†Gaudryceras seymouriense Macellari 1986
†Gaudryceras stefaninii Venzo 1936
†Gaudryceras striatum Jimbo 1894
†Gaudryceras tenuiliratum Yabe 1903
†Gaudryceras varagurense Kossmat 1895
†Lytoceras (Gaudryceras) alamedense Smith 1889
†Lytoceras (Gaudryceras) delvallense Anderson 1958
†Lytoceras (Gaudryceras) neptunium Anderson 1938
†Lytoceras (Gaudryceras) texanum Anderson 1958
Invalid names: Epigaudryceras Shimizu 1934 [synonym], Hemigaudryceras Shimizu 1934 [synonym], Mesogaudryceras Spath 1927 [synonym], Neogaudryceras Shimizu 1935 [synonym], Pseudogaudryceras Shimizu 1934 [synonym], Vertebrites Marshall 1926 [synonym]