• Isognomon [Lightfoot], 1786
• Isognomon (Anisoperna) Iredale, 1939 represented as Isognomon [Lightfoot], 1786
• Isognomon (Hippochaeta) Philippi, 1844 † represented as Isognomon [Lightfoot], 1786
• Isognomon (Hippochaeta) maxillatus (Lamarck, 1801) † represented as Isognomon maxillatus (Lamarck, 1801) †
• Isognomon (Isognomon) [Lightfoot], 1786 represented as Isognomon [Lightfoot], 1786
• Isognomon (Isognomon) radiatus (M. Hörnes, 1867) represented as Isognomon radiatus (M. Hörnes, 1867) †
• Isognomon (Isognomon) rekohuensis J. S. Crampton, 1988 represented as Isognomon rekohuensis J. S. Crampton, 1988 †
• Isognomon (Isognomon) rollei (M. Hörnes, 1867) † represented as Isognomon rollei (M. Hörnes, 1867) †
• Isognomon (Isognomon) varnensis (Toula, 1892) † represented as Isognomon varnensis (Toula, 1892) †
• Isognomon (Isognomon) wellmani J. S. Crampton, 1988 represented as Isognomon wellmani J. S. Crampton, 1988 †
• Isognomon (Melina) Philipsson, 1788 accepted as Isognomon [Lightfoot], 1786
• Isognomon (Melina) janus P. P. Carpenter, 1857 accepted as Isognomon janus P. P. Carpenter, 1857
• Isognomon (Melina) recognitus (Mabille, 1895) accepted as Isognomon recognitus (Mabille, 1895)
• Isognomon (Parviperna) Iredale, 1939 represented as Isognomon [Lightfoot], 1786
• Isognomon (Parviperna) nucleus (Lamarck, 1819) represented as Isognomon nucleus (Lamarck, 1819)
• Isognomon acutirostris (Dunker, 1869) accepted as Isognomon nucleus (Lamarck, 1819)
• Isognomon acutirostris Otuka, 1936 accepted as Isognomon nucleus (Lamarck, 1819)
• Isognomon alatus (Gmelin, 1791)
• Isognomon albisoror (Iredale, 1939)
• Isognomon anomioides (Reeve, 1858) accepted as Isognomon australicus (Reeve, 1858)
• Isognomon attenuata (Reeve, 1858) accepted as Isognomon isognomum (Linnaeus, 1758)
• Isognomon australica (Reeve, 1858) accepted as Isognomon australicus (Reeve, 1858)
• Isognomon australicus (Reeve, 1858)
• Isognomon aviculare (Lamarck, 1819) accepted as Isognomon isognomum (Linnaeus, 1758)
• Isognomon bazini (Deshayes, 1858) †
• Isognomon bicolor (C. B. Adams, 1845)
• Isognomon brevirostre Link, 1807 accepted as Isognomon isognomum (Linnaeus, 1758)
• Isognomon californicum (Conrad, 1837) accepted as Isognomon californicus (Conrad, 1837)
• Isognomon californicus (Conrad, 1837)
• Isognomon ciscaucasica (Davitashvili, 1932) † accepted as Isognomon radiatus (M. Hörnes, 1867) †
• Isognomon dentifer (Krauss, 1848) accepted as Isognomon nucleus (Lamarck, 1819)
• Isognomon dunkeri (P. Fischer, 1881)
• Isognomon ephippium (Linnaeus, 1758)
• Isognomon fortissimus (L. C. King, 1933) †
• Isognomon gaudichaudi (A. d'Orbigny, 1843) †
• Isognomon incavatus (Cossmann, 1905) †
• Isognomon incisus (Conrad, 1837)
• Isognomon isognomon (Linnaeus, 1758) accepted as Isognomon isognomum (Linnaeus, 1758)
• Isognomon isognomum (Linnaeus, 1758)
• Isognomon janus P. P. Carpenter, 1857
• Isognomon lamarckii (Deshayes, 1830) †
• Isognomon legumen (Gmelin, 1791)
• Isognomon lilingensis R.-J. Zhang, 1977 † (uncertain > unassessed)
• Isognomon lusitanicus (Sharpe, 1850) †
• Isognomon maxillatus (Lamarck, 1801) †
• Isognomon nucleus (Lamarck, 1819)
• Isognomon oneroaensis A. W. B. Powell & Bartrum, 1929 † accepted as Pteria oneroaensis (A. W. B. Powell & Bartrum, 1929) †
• Isognomon percrassa (Tate, 1899) †
• Isognomon perna (Linnaeus, 1767)
• Isognomon radiatus (Anton, 1838)
• Isognomon radiatus (M. Hörnes, 1867) † (accepted > unreplaced junior homonym)
• Isognomon recognitus (Mabille, 1895)
• Isognomon rekohuensis J. S. Crampton, 1988 †
• Isognomon ricordeanus (A. d'Orbigny, 1846) †
• Isognomon roberti H. J. Koch, 1953 accepted as Isognomon perna (Linnaeus, 1767)
• Isognomon rollei (M. Hörnes, 1867) †
• Isognomon rude (Reeve, 1858) accepted as Isognomon isognomum (Linnaeus, 1758)
• Isognomon rugosus (Münster, 1835) †
• Isognomon rupella (Dufo, 1840) accepted as Isognomon nucleus (Lamarck, 1819)
• Isognomon staadti (Cossmann, 1907) †
• Isognomon sulcatum (Lamarck, 1819) accepted as Isognomon perna (Linnaeus, 1767)
• Isognomon varnensis (Toula, 1892) †
• Isognomon vulsella (Lamarck, 1819) accepted as Isognomon legumen (Gmelin, 1791)
• Isognomon vulselloides Macsotay & Campos, 2001
• Isognomon wellmani J. S. Crampton, 1988 †
• Isognomonidae Woodring, 1925 (1828)