• Amphicyrtoceras gunense Foerste, 1928 †
• Amphicyrtoceras tantalum Foerste, 1924 (uncertain > unassessed)
• Anomaloceras anomalum (Barrande, 1865) †
• Aphyctoceras annulatum (Barrande, 1865) †
• Aphyctoceras friesenbichlerae Pohle & Klug, 2018 †
• Aphyctoceras parvulum (Kuzmin, 1966) †
• Asymmetroceras abnorme J.-Y. Chen & G.-W. Liu, 1974 †
• Augustoceras shideleri Flower, 1946 †
• Basiloceras david Pohle, Klug & M. Haas, 2019 †
• Basiloceras goliath Pohle, Klug & M. Haas, 2019 †
• Beloitoceras agaricus Flower, 1945 †
• Beloitoceras amoenum (S. A. Miller, 1878) †
• Beloitoceras bucheri Flower, 1946 †
• Beloitoceras cartierense Flower, 1945 †
• Beloitoceras heterocurvatum Strand, 1934 † accepted as Beloitoceras sinuososeptatum (C. F. Roemer, 1861) †
• Beloitoceras huronense (Billings, 1865) †
• Beloitoceras imitans Flower, 1945 †
• Beloitoceras lobiferum Flower, 1952 †
• Beloitoceras orilliense Flower, 1952 †
• Beloitoceras pandion (J. Hall, 1861) †
• Beloitoceras siljanense Frye, 1987 †
• Beloitoceras sinuososeptatum (C. F. Roemer, 1861) †
• Beloitoceras stoermeri Sweet, 1958 †
• Beloitoceras thorslundi Kröger & Aubrechtová, 2019 †
• Beloitoceras uuemoisense Kröger, 2025 †
• Bohemjovellania adraei Kröger, 2008 †
• Bohemjovellania bouskai Manda, 2011 †
• Bohemjovellania obliqua Kröger, 2008 †
• Brevicoceras casteri Flower, 1938 †
• Brevicoceras magnum Kröger, 2008 †
• Cerovoceras brevidomus Kröger, 2008 †
• Cerovoceras fatimi Kröger, 2008 †
• Chromatoceras constringens (Barrande, 1866) †
• Chromatoceras veteranum (Barrande, 1866) †
• Conistichoceras hardmanni (R. Etheridge, 1897) †
• Cranoceras depressum (Bronn, 1835) †
• Cyrtoceras acinacellum Whitfield, 1886 † accepted as Bassleroceras acinacellum (Whitfield, 1886) †
• Cyrtoceras alethes Billings, 1865 † accepted as Bassleroceras alethes (Billings, 1865) †
• Cyrtoceras alternans Tietze, 1871 † accepted as Dasbergoceras alternans (Tietze, 1871) †
• Cyrtoceras amoenum S. A. Miller, 1878 † accepted as Beloitoceras amoenum (S. A. Miller, 1878) †
• Cyrtoceras aristides Billings, 1865 † accepted as Bassleroceras aristides (Billings, 1865) †
• Cyrtoceras beekmanensis Whitfield, 1889 † accepted as Bassleroceras beekmanense (Whitfield, 1889) †
• Cyrtoceras cambria Walcott, 1905 † accepted as Plectronoceras cambria (Walcott, 1905) †
• Cyrtoceras confertissimum Whitfield, 1886 † accepted as Lawrenceoceras confertissimum (Whitfield, 1886) †
• Cyrtoceras constringens Barrande, 1866 † accepted as Chromatoceras constringens (Barrande, 1866) †
• Cyrtoceras corniculum J. Hall, 1862 † accepted as Cyrtoceras tenuistriatum J. Hall, 1877 † accepted as Laphamoceras tenuistriatum (J. Hall, 1877) †
• Cyrtoceras cornu de Koninck, 1880 † accepted as Pseudocyrtoceras cornu (de Koninck, 1880) †
• Cyrtoceras curtum F. B. Meek & Worthen, 1861 † accepted as Brachycycloceras curtum (F. B. Meek & Worthen, 1861) †
• Cyrtoceras dactyloides Dwight, 1884 † accepted as Dwightoceras dactyloides (Dwight, 1884) †
• Cyrtoceras decurio Barrande, 1866 † accepted as Euryrizoceras decurio (Barrande, 1866) †
• Cyrtoceras dictys Billings, 1865 † accepted as Dyscritoceras dictys (Billings, 1865) †
• Cyrtoceras dilatatum F. B. Meek & Worthen, 1861 † accepted as Brachycycloceras curtum (F. B. Meek & Worthen, 1861) †
• Cyrtoceras dresbachense Sardeson, 1896 † accepted as Ectenoceras dresbachense (Sardeson, 1896) †
• Cyrtoceras forbesi Barrande, 1866 † accepted as Richardsonoceras forbesi (Barrande, 1866) †
• Cyrtoceras fraternum Barrande, 1866 † accepted as Richardsonoceras fraternum (Barrande, 1866) †
• Cyrtoceras gracile Cleland, 1903 † accepted as Dakeoceras gracile (Cleland, 1903) †
• Cyrtoceras huronense Billings, 1865 † accepted as Beloitoceras huronense (Billings, 1865) †
• Cyrtoceras impatiens Barrande, 1866 † accepted as Oonoceras impatiens (Barrande, 1866) †
• Cyrtoceras kirbyi Whitfield, 1889 † accepted as Bassleroceras kirbyi (Whitfield, 1889) †
• Cyrtoceras lepidum Barrande, 1866 † accepted as Lepidoceras lepidum (Barrande, 1866) †
• Cyrtoceras longitudinale Angelin, 1880 † accepted as Warburgoceras longitudinale (Angelin, 1880) †
• Cyrtoceras luthei S. Calvin, 1892 † accepted as Clarkoceras luthei (S. Calvin, 1892) †
• Cyrtoceras lysander Billings, 1865 † accepted as Manitoulinoceras lysander (Billings, 1865) †
• Cyrtoceras metellus Billings, 1865 † accepted as Dyscritoceras metellus (Billings, 1865) †
• Cyrtoceras microscopicum W. B. Dwight, 1884 † accepted as Bassleroceras microscopicum (W. B. Dwight, 1884) †
• Cyrtoceras minneapolis J. M. Clarke, 1897 † (uncertain > unassessed)
• Cyrtoceras peculiare Girty, 1911 † accepted as Brachycycloceras curtum (F. B. Meek & Worthen, 1861) †
• Cyrtoceras praecox Salter, 1866 † accepted as Dakeoceras praecox (Salter, 1866) †
• Cyrtoceras priscum Eichwald, 1860 † accepted as Richardsonoceras priscum (Eichwald, 1860) †
• Cyrtoceras quebecense Whiteaves, 1898 † accepted as Quebecoceras quebecense (Whiteaves, 1898) †
• Cyrtoceras raei Whitfield, 1889 † accepted as Seelyoceras raei (Whitfield, 1889) †
• Cyrtoceras spissiseptum W. B. Dwight, 1884 † accepted as Bassleroceras spissiseptum (W. B. Dwight, 1884) †
• Cyrtoceras subrectum J. Hall, 1859 † (uncertain > unassessed)
• Cyrtoceras surgens Barrande, 1870 † accepted as Lawrenceoceras surgens (Barrande, 1870) †
• Cyrtoceras syphax Billings, 1865 † accepted as Eremoceras syphax (Billings, 1865) †
• Cyrtoceras tenuistriatum J. Hall, 1877 † accepted as Laphamoceras tenuistriatum (J. Hall, 1877) †
• Cyrtoceras tuberculatum F. McCoy, 1844 † (uncertain > unassessed)
• Cyrtoceras uranus Barrande, 1866 † accepted as Uranoceras uranus (Barrande, 1866) †
• Cyrtoceras vassarina W. B. Dwight, 1884 † accepted as Bassleroceras vassarina (W. B. Dwight, 1884) †
• Cyrtoceras veteranum Barrande, 1866 † accepted as Chromatoceras veteranum (Barrande, 1866) †
• Cyrtoceras winonicum Sardeson, 1896 † accepted as Ectenolites winonicum (Sardeson, 1896) †
• Cyrtoceratites cancellatus F. A. Roemer, 1844 † (uncertain > unassessed)
• Cyrtoceratites flexuosus (Schlotheim, 1820) †
• Cyrtoceratites multistriatus F. A. Roemer, 1844 † (uncertain > unassessed)
• Cyrtorizoceras dalecarlicum Frye, 1987 † accepted as Dalecarlioceras dalecarlicum (Frye, 1987) †
• Cyrtorizoceras hariense Kröger, 2025 †
• Cyrtorizoceras rougense Flower, 1945 †
• Cyrtorizoceras rusti Flower, 1952 †
• Cyrtorizoceras thorslundi Kröger, 2013 †
• Dalecarlioceras bodense Frye, 1987 †
• Dalecarlioceras constrictum Frye, 1987 †
• Dalecarlioceras dalecarlicum (Frye, 1987) †
• Danoceras breve Strand, 1934 †
• Danoceras broeggeri Strand, 1934 †
• Danoceras fusiforme Balashov, 1959 †
• Danoceras inutile Flower, 1952 †
• Danoceras oviforme Kröger, 2025 †
• Danoceras piersalense (Teichert, 1930) †
• Danoceras ravni Troedsson, 1926 †
• Danoceras scandinavicum Strand, 1934 †