Alasmodon Rafinesque, 1831
Rafinesque, 1831, Continuation: 5.

Amblamadon Rafinesque, 1831
Rafinesque, 1831, Continuation: 5.

Amblamodon Rafinesque, 1831
Rafinesque, 1831, Continuation: 5.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 80.
(incorrect original spelling of Amblasmodon Rafinesque, 1831)

Amblasmadon Rafinesque, 1831
Rafinesque, 1831, Continuation: 5.
(error for Amblasmodon Rafinesque, 1831)

Amblasmodon Rafinesque, 1831
Rafinesque, 1831, Continuation: 4.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 78.
(correct name for Amblamodon Rafinesque, 1831)
Type species: Amblasmodon hians Rafinesque, 1831 (monotypy) = Lasmigona costata

Lasmigona Rafinesque, 1831
Rafinesque, 1831, Continuation: 4.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 78.
(renamed Elasmogona Agassiz, 1846)
Type species: Alasmidonta costata Rafinesque, 1820 (sub. desig. by Simpson, 1900: 664) = Lasmigona costata

Pterosyna Rafinesque, 1831
Rafinesque, 1831, Continuation: 5.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 79.
Type species: Alasmodonta complanata Barnes, 1823 (orig. desig.) = Lasmigona complanata

Lymnadia Sowerby, 1839
‘Sw.’ Sowerby, 1839, Conch. Man.: 60.
Swainson, 1840, Treat. Malacol.: 265-266, 268, 273, 285, 289-290; 379 [as ‘Lymnadea’].
(renamed Limnadea Agassiz, 1846)
Type species: Unio gigas Swainson, 1824 (monotypy) = Lasmigona complanata

Complanaria Swainson, 1840
Swainson, 1840, Treat. Malacol.: 288-290, 382.
Type species: Complanaria gigas Swainson, 1840 () = Lasmigona complanata

Lymnadea Swainson, 1840
Swainson, 1840, Treat. Malacol.: 379.
(error for Lymnadia Sowerby, 1839)

Megadomus Swainson, 1840
Swainson, 1840, Treat. Malacol.: 265-266, 268-269, 274-275, 290, 378.
Type species: Unio gigas Swainson, 1824 (orig. desig.) = Lasmigona complanata

Elasmogona Agassiz, 1846
Agassiz, 1846, Nomencl. Zool. Index Univ.: 135.
(new name for Lasmigona Rafinesque, 1831)

Limnadea Agassiz, 1846
Agassiz, 1846, Nomencl. Zool. Index Univ.: 210.
(new name for Lymnadia Sowerby, 1839)

Elasmogena Herrmannsen, 1852
‘Ag.’ Herrmannsen, 1852, Ind. Gener. Malacol. 2: 49.
(error for Elasmogona Agassiz, 1846)

Pterosygna Simpson, 1900
‘Rafinesque’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 665.
Ortmann, 1909, Ann. Carnegie Mus. 5: 196.
Simpson, 1914, Descr. Cat. Naiades: 490.
Ortmann, 1914, Nautilus 28(4): 43.
Walker, 1918, Occ. Pap. Mus. Zool. Univ. Mich. (49): 2.
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 147.
Haas, 1930, Senckenbergiana 12(6): 326.
(error for Pterosyna Rafinesque, 1831)

Elasmigena Clarke, 1985
‘Herrmannsen’ Clarke, 1985, Smithson. Contrib. Zool. (399): 2.
(error for Elasmogena Herrmannsen, 1852)

Taxonomic History (since 1900)

Symphynota (Lasmigona) — Simpson (1900), Ortmann (1909), Simpson (1914)
Symphynota (Pterosygna [sic]) — Simpson (1900), Simpson (1914)
Alasmidonta — Simpson (1900), Simpson (1914)
Unio (Margaritana) — Call (1900)
Symphynota — Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912), Utterback (1915)
Symphynota (Pterosygna) [sic] — Ortmann (1909)
Lasmigona (s.s.) — Ortmann (1918), Ortmann & Walker (1922), Ortmann (1924), Ortmann (1925), ..., Haas (1969), R.I. Johnson (1970), Clarke (1985), Graf & Cummings (2007)
Lasmigona (Pterosyna) — Ortmann (1924), Ortmann (1925), Frierson (1927), F.C. Baker (1928), Haas (1969), Haas (1969)
Lasmigona (Pterosygna) [sic] — Haas (1930)
Lasmigona (sec. Pterosyna) — Thiele (1934)
Lasmigona — Murray & Leonard (1962), Clarke (1973), Heard (1975), Burch (1975), ..., Klymus et al. (2020), FMCS (2021), Graf & Cummings (2021), Whelan et al. (2023)
— Haas (1969)