Traits Taxon list
Bathyisognomon smithwickensis Hickman, 2023 †
Isognomon (Hippochaeta) maxillatus (Lamarck, 1801) † represented as Isognomon maxillatus (Lamarck, 1801) †
Isognomon (Isognomon) radiatus (M. Hörnes, 1867) represented as Isognomon radiatus (M. Hörnes, 1867) †
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 (Parviperna) nucleus (Lamarck, 1819) represented as Isognomon nucleus (Lamarck, 1819)
Isognomon alatus (Gmelin, 1791)
Isognomon albisoror (Iredale, 1939)
Isognomon australicus (Reeve, 1858)
Isognomon bazini (Deshayes, 1858) †
Isognomon bicolor (C. B. Adams, 1845)
Isognomon californicus (Conrad, 1837)
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 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 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 rollei (M. Hörnes, 1867) †
Isognomon rugosus (Münster, 1835) †
Isognomon staadti (Cossmann, 1907) †
Isognomon varnensis (Toula, 1892) †
Isognomon vulselloides Macsotay & Campos, 2001
Isognomon wellmani J. S. Crampton, 1988 †
Tambanella gujoensis Nakazawa & Newell, 1968 †
Tambanella shaodongensis R.-J. Zhang, 1977 † (uncertain > unassessed )
Tambanella stetteneckensis Prinoth & Posenato, 2023 †
Waagenoperna aurita J.-F. Xu, 1984 †
Waagenoperna lateplanata (L. Waagen, 1907) †
Waagenoperna sichuanensis J.-F. Xu, 1984 †
Waagenoperna sichuanensis producta J.-F. Xu, 1984 †
Waagenoperna sichuanensis sichuanensis J.-F. Xu, 1984 †