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

Sulcularia Rafinesque, 1831
Rafinesque, 1831, Continuation: 4.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 79.
Type species: Sulcularia badia Rafinesque, 1831 (sub. desig. by Frierson, 1914: 7) = Lasmigona holstonia

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)

Sulcataria Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 673.
(error for Sulcularia Rafinesque, 1831)

Symphynota Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 662.
Ortmann, 1912, Ann. Carnegie Mus. 8: 280.
Simpson, 1914, Descr. Cat. Naiades: 480.
Ortmann, 1914, Nautilus 28(4): 41.
(reference to Symphynota Lea, 1829)
Type species: Symphynota compressa Lea, 1829 (orig. desig.) = Lasmigona compressa

Alasminota Ortmann, 1914
Ortmann, 1914, Nautilus 28(4): 41.
Ortmann & Walker, 1922, Occ. Pap. Mus. Zool. Univ. Mich. (112): 33.
Ortmann, 1923, Nautilus 36(3): 83.
Ortmann, 1924, Amer. Midl. Nat. 9(1): 22.
(intro'd as sub-gen. of Symphynota Lea, 1829)
Type species: Margaritana holstonia Lea, 1838 (orig. desig.) = Lasmigona holstonia

Platynaias Walker, 1918
Walker, 1918, Occ. Pap. Mus. Zool. Univ. Mich. (49): 2.
Ortmann & Walker, 1922, Occ. Pap. Mus. Zool. Univ. Mich. (112): 33.
Type species: Symphynota compressa Lea, 1829 (orig. desig.) = Lasmigona compressa

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

Taxonomic History (since 1900)

Unio (sec. Elliptio) — Simpson (1900), Simpson (1914)
Symphynota (s.s.) — Simpson (1900), Simpson (1914)
Symphynota (Lasmigona) — Simpson (1900), Ortmann (1909), Simpson (1914)
Symphynota (Pterosygna [sic]) — Simpson (1900), Simpson (1914)
Alasmidonta (Pressodonta) — Simpson (1900), Simpson (1914)
Alasmidonta — Simpson (1900), Simpson (1914)
Unio (s.s.) — Call (1900)
Unio (Margaritana) — Call (1900)
Symphynota — Ortmann (1909), Ortmann (1909), Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1912), Utterback (1915)
Symphynota (Pterosygna) [sic] — Ortmann (1909)
— Simpson (1914), Ortmann (1918), Ortmann (1925), Haas (1969), Burch (1975)
Symphynota (Alasminota) — Ortmann (1914)
Unio — de Gregorio (1914)
Lasmigona (Sulcularia) — Ortmann (1918), Haas (1969), Haas (1969)
Lasmigona (s.s.) — Ortmann (1918), Ortmann & Walker (1922), Ortmann (1924), Ortmann (1925), ..., Haas (1969), R.I. Johnson (1970), Clarke (1985), Graf & Cummings (2007)
Lasmigona (Platynaias) — Ortmann & Walker (1922), Frierson (1927), F.C. Baker (1928), Haas (1969), Haas (1969), R.I. Johnson (1970), Clarke (1985), Graf & Cummings (2007)
Lasmigona (Alasminota) — Ortmann & Walker (1922), Ortmann (1923), Ortmann (1924), Ortmann (1925), Clarke (1985), Graf & Cummings (2007)
Lasmigona (Pterosyna) — Ortmann (1924), Ortmann (1925), Frierson (1927), F.C. Baker (1928), Haas (1969), Haas (1969)
Alasmidonta (Sulcularia) — Frierson (1927)
Elliptio (s.s.) — Frierson (1927), Haas (1969)
Lasmigona (Pterosygna) [sic] — Haas (1930)
Lasmigona (sec. Platynaias) — Thiele (1934)
Lasmigona (sec. Sulcularia) — Thiele (1934)
Lasmigona (sec. Pterosyna) — Thiele (1934)
Lasmigona — Murray & Leonard (1962), Morrison (1969), Clarke (1973), Heard (1975), ..., Zieritz et al. (2021), FMCS (2021), Wu et al. (2022), Jeratthitikul et al. (2022)