Classification of the genus Pachydiscus
G. †Pachydiscus Zittel 1884
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Subg. †Pachydiscus (Neodesmoceras) Matsumoto 1947
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†Neodesmoceras catarinae Anderson and Hanna 1935
†Pachydiscus (Neodesmoceras) mokotibensis Collignon 1952
†Pachydiscus (Neodesmoceras) obsoletiformis Jones 1963
†Pachydiscus (Neodesmoceras) princeps Anderson 1958
†Pachydiscus (Neodesmoceras) soma Forbes 1846
Subg. †Pachydiscus (Pachydiscus) Zittel 1884
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†Pachydiscus (Pachydiscus) arkansanus Stephenson 1941
†Pachydiscus (Pachydiscus) australis Henderson and McNamara 1985
†Pachydiscus (Pachydiscus) awajiensis Morozumi 1985
†Pachydiscus (Pachydiscus) cayeuxi de Grossouvre 1894
†Pachydiscus (Pachydiscus) complanatus Collignon 1952
†Pachydiscus (Pachydiscus) dossantosi Maury 1930
†Pachydiscus (Pachydiscus) duelmensis Schluter 1872
†Pachydiscus (Pachydiscus) egertoni Forbes 1846
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Invalid names: Ammonites ganesa Forbes 1846 [synonym], Parapachydiscus coalingensis Anderson 1958 [synonym]
†Pachydiscus (Pachydiscus) gutierrezi Salazar et al. 2010
†Pachydiscus (Pachydiscus) haldemsis Schluter 1867
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Invalid names: Ammonites auritocostatus Schlüter 1872 [synonym], Pachydiscus kaliszanensis Nowak 1913 [synonym], Pachydiscus koeneni de Grossouvre 1894 [synonym]
†Pachydiscus (Pachydiscus) hazzardi Jones 1963
†Pachydiscus (Pachydiscus) jacquoti Seunes 1890
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Invalid names: Pachydiscus (Pachydiscus) llareni Wiedmann 1960 [synonym], Pachydiscus llareni Wiedmann 1960 [synonym]
†Pachydiscus (Pachydiscus) jeani de Grossouvre 1894
†Pachydiscus (Pachydiscus) kamishakensis Jones 1963
†Pachydiscus (Pachydiscus) neubergicus Hauer 1858
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Invalid names: Ammonites chrishna Forbes 1846 [synonym]
†Pachydiscus (Pachydiscus) noetlingi Kennedy 1999
†Pachydiscus (Pachydiscus) oldhami Sharpe 1855
†Pachydiscus (Pachydiscus) ootacodensis Stolickzka 1865
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Invalid names: Pachydiscus (Pachydiscus) hornbyense Jones 1963 [synonym]
†Pachydiscus (Pachydiscus) paulsoni Young 1963
†Pachydiscus (Pachydiscus) rogeri Marshall 1926
†Pachydiscus (Pachydiscus) ultimus Macellari 1986
†Pachydiscus (Pachydiscus) yama Forbes 1846
†Pachydiscus armenicus Atabekian and Akopian 1969
†Pachydiscus besairiei Basse 1930
†Pachydiscus binodatus Whiteaves 1903
†Pachydiscus buckhami Usher 1952
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Invalid names: Pachydiscus elkhornensis Usher 1952 [synonym], Parapachydiscus gabbi Anderson 1958 [synonym], Parapachydiscus panochensis Anderson 1958 [synonym]
†Pachydiscus colligatus Binkhorst 1861
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Invalid names: Pachydiscus vandenbroecki de Grossouvre 1894 [synonym]
†Pachydiscus epiplectus Redtenbacher 1873
†Pachydiscus excelsus Matsumoto 1979
†Pachydiscus flexuosus Matsumoto 1979
†Pachydiscus gollevillensis d'Orbigny 1847
†Pachydiscus gollevillensis armenicus Atabekian and Akopian 1969
†Pachydiscus hauthali Paulcke 1907
†Pachydiscus launayi de Grossouvre 1894
†Pachydiscus levyi de Grossouvre 1894
†Pachydiscus naumanni Yokoyama 1890
†Pachydiscus neevesi Whiteaves 1903
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Invalid names: Parapachydiscus bidwelli Anderson 1958 [synonym]
†Pachydiscus patagonicus Paulcke 1907
†Pachydiscus peramplus Mantell 1822
†Pachydiscus perfidus Grossouvre 1894
†Pachydiscus precolligatus Collignon 1955
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Invalid names: Pachydiscus gignouxi Collignon 1955 [synonym]
†Pachydiscus riccardi Macellari 1986
†Pachydiscus stallauensis Imkeller 1901
†Pachydiscus steinmanni Paulcke 1907
†Pachydiscus subcompressus Matsumoto 1954
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Invalid names: Joaquinites fascicostatus Anderson 1958 [synonym]
†Pachydiscus subrobustus Seunes 1892
Invalid names: Joaquinites Anderson 1958 [synonym], Parapachydiscus Hyatt 1900 [synonym], Pseudomenuites Matsumoto 1955 [synonym]