Classification of the genus Olcostephanus

G. †Olcostephanus Neumayr 1875
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Subg. †Olcostephanus (Jeannoticeras) Thieuloy 1965
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†Olcostephanus (Jeannoticeras) agrioensis Aguirre-Urreta and Rawson 2001
Subg. †Olcostephanus (Olcostephanus) Neumayr 1875
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Invalid names: Holcostephanus leanzai Giovine 1950 [synonym]
†Olcostephanus (Olcostephanus) nicklesi Wiedmann and Dieni 1968
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Invalid names: Olcostephanus (Lemurostephanus) sanctifirminensis Thieuloy 1977 [synonym], Olcostephanus (Olcostephanus) thieuloyi Autran 1993 [synonym]
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Invalid names: Olcostephanus victoris Spath 1939 [synonym]
Subg. †Olcostephanus (Viluceras) Aguirre-Urreta and Rawson 1999
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†Olcostephanus (Viluceras) duraznoensis Aguirre-Urreta and Rawson 1999
†Olcostephanus astierianus d'Orbigny 1840
†Olcostephanus atherstoni Sharpe 1856
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Invalid names: Ammonites bainii Sharpe 1856 [synonym], Ammonites schenki Oppel 1863 [synonym], Astieria actinota Baumberger 1908 [synonym], Astieria astieriformis Böse 1923 [synonym], Astieria catulloi Rodighiero 1919 [synonym], Astieria curacoensis Weaver 1931 [synonym], Astieria imbricata Baumberger 1908 [synonym], Astieria leptoplana Baumberger 1908 [synonym], Astieria sudandina Windhausen 1931 [synonym], Astieria symonensis Böse 1923 [synonym], Holcostephanus (Astieria) guebhardi Killian 1902 [synonym], Holcostephanus auritus Leanza 1944 [synonym], Holcostephanus midas Leanza 1944 [synonym], Holcostephanus modderensis Kitchin 1908 [synonym], Holcostephanus rogersi Kitchin 1908 [synonym], Holcostephanus wilmanae Kitchin 1908 [synonym], Olcostephanus coahuilensis Imlay 1938 [synonym], Olcostephanus quadriradiatus Imlay 1938 [synonym], Rogersites bakeri Imlay 1937 [synonym], Rogersites curvicostata Besairie 1936 [synonym], Rogersites douvillei Besairie 1932 [synonym], Rogersites filifer Imlay 1937 [synonym], Rogersites otoitoides Spath 1930 [synonym], Rogersites prorsiradiatus Imlay 1937 [synonym], Rogersites sphaeroidalis Spath 1930 [synonym], Rogersites tenuicostatus Imlay 1937 [synonym], Taraisites neoleonense Cantu-Chapa 1966 [synonym]
†Olcostephanus detonii Rodighiero 1919
†Olcostephanus pecki Imlay 1960
†Olcostephanus popenoei Imlay 1960
Invalid names: Astieria Pavlow 1892 [objective synonym], Holcostephanus Sayn 1889 [synonym], Lemurostephanus Thieuloy 1977 [synonym], Maderia Imlay 1938 [synonym], Rogersites Spath 1924 [synonym], Satoites Cantú-Chapa 1966 [synonym], Subastieria Spath 1923 [synonym], Taraisites Cantú-Chapa 1966 [synonym]