Classification of the genus Protrachyceras
G. †Protrachyceras Mojsisovics 1893
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†Protrachyceras anatolicum Toula 1898
†Protrachyceras archelaus Laube 1869
†Protrachyceras cautleyi Diener 1907
†Protrachyceras costulatum Mansuy 1912
†Protrachyceras deprati Mansuy 1912
†Protrachyceras guizhouense Wang 1983
†Protrachyceras hispanicum von Mojsisovics 1881
†Protrachyceras ibericum Mojsisovics 1882
†Protrachyceras irregulare Fantini Sestini 1994
†Protrachyceras ladinum Mojsisovics 1882
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Invalid names: Ammonites aequinodosus Klipstein 1843 [synonym], Trachyceras altum von Mojsisovics 1878 [synonym]
†Protrachyceras lermani Parnes 1986
†Protrachyceras longobardicum Mojsisovics 1882
†Protrachyceras margaritosum von Mojsisovics 1882
†Protrachyceras mutabile Wang 1983
†Protrachyceras negevense Parnes 1986
†Protrachyceras parinaense Fantini Sestini 1994
†Protrachyceras pseudoarchelaus Boeckh 1873
†Protrachyceras sikanianum McLearn 1930
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Invalid names: Protrachyceras zauwae McLearn 1930 [synonym]
†Protrachyceras sirenitiforme Parnes 1962
†Protrachyceras spitiense Diener 1908
†Protrachyceras steinmanni von Mojsisovics 1882
†Protrachyceras wahrmani Parnes 1962
†Trachyceras (Protrachyceras) ralphuanum von Mojsisovics 1896
†Trachyceras (Protrachyceras) springeri Smith 1914
†Trachyceras (Protrachyceras) storrsi Smith 1927
Invalid names: Protrachyceras ladinum parana Parnes 1962 [replaced]