Monodonta Say, 1817
Say, 1817, Nich. Encyc. 2: [13].
(homonym of Lamarck, 1801 [Gastrop.]; renamed Alasmidonta Say, 1818)
Type species: Unio undulata Say, 1817 (orig. desig.) = Alasmidonta undulata

Alasmidonta Say, 1818
Say, 1818, Jour. Acad. Nat. Sci. 1(11): 459.
Say, 1819, Nich. Encyc. 4: unpaginated.
(new name for Monodonta Say, 1817; renamed Alasmodonta Say, 1819)

Alasmodonta Say, 1819
‘Say’ of Authors.
Say, 1819, Nich. Encyc. 4: [18].
Barnes, 1823, Amer. J. Sci. 6 (1-2): 275.
Say, 1825, Jour. Acad. Nat. Sci. 5(3-4): 131.
Férussac, 1827, Bull. Sci. Nat. et Géol. 10: 417.
Hildreth, 1828, Amer. J. Sci. 14: 289.
Lea, 1829, Trans. Amer. Phil. Soc. 3 [O. 1]: 421.
Menke, 1830, Syn. Method. Moll.: 106.
Ferussac, 1835, Mag. Zool. 5: 25.
Lea, 1836, Synopsis Fam. Naiades: 43.
Schlüter, 1838, Kurzgef. Syst. Verz. Conch. Samml.: 32.
Agassiz, 1852, Arch. Naturg. 18(1): 46.
Adams & Adams, 1857, Gen. Rec. Moll. 2(31-32): 499.
Vest, 1866, Verh. Mitth. Siebenbürg. Ver. Naturw. (17): 197.
Sowerby, 1868, Conch. Icon. 16: pl. 1.
(new name for Alasmidonta Say, 1818; renamed Anelasmodon Agassiz, 1846)

Alasmodon Thompson, 1820
Thompson, 1820, Ann. Phil. 16: 116.
‘Say’ Sowerby, 1824, Zool. Jour. 1: 54.
‘Say’ Sowerby, 1839, Conch. Man.: 2.
‘Say’ Swainson, 1840, Treat. Malacol.: 262, 264, 266, 269-274, 278-279, 290, 382.
De Kay, 1843, Zool. New York 5: 196.
‘Say’ Woodward, 1871, Man. Moll: 433.
(error for Alasmodonta Say, 1819; renamed Anelasmodon Agassiz, 1846)

Alasmisodonta Blainville, 1825
‘Say’ Blainville, 1825, Manuel Malacol. et Conch.: 630, 639.
(error for Alasmidonta Say, 1818)

Alismadon Fleming, 1828
Fleming, 1828, Hist. Brit. Anim.: 408.
(error for Alasmodon Thompson, 1820)

Decurambis Rafinesque, 1831
Rafinesque, 1831, Continuation: 4.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 79.
Type species: Decurambis scriptum Rafinesque, 1831 (sub. desig. by Ortmann & Walker, 1922: 38) = Alasmidonta marginata

Alasmadonta Jay, 1835
Jay, 1835, Cat. Rec. Shells: 18.
(error for Alasmidonta Say, 1818)

Uniopsis Swainson, 1840
Swainson, 1840, Treat. Malacol.: 288, 290, 382.
Type species: Uniopsis mytiloides Swainson, 1840 (sub. desig. by Gray, 1847: 196) = Alasmidonta undulata

Anelasmodon Agassiz, 1846
Agassiz, 1846, Nomencl. Zool. Index Univ.: 22.
(new name for Alasmodonta Say, 1819; new name for Alasmodon Thompson, 1820)

Anelasmodonta Herrmannsen, 1846
Herrmannsen, 1846, Ind. Gener. Malacol. 1: 27, 54.

Alasmedonta Gray, 1847
‘Say’ Gray, 1847, Proc. Zool. Soc. London 15: 196.
(error for Alasmidonta Say, 1818)

Alasmesodonta Gray, 1847
‘Blainv.’ Gray, 1847, Proc. Zool. Soc. London 15: 196.
(error for Alasmisodonta Blainville, 1825)

Decarambis Paetel, 1875
‘Rafnq.’ Paetel, 1875, Fam. Gatt. Moll.: 67.
(error for Decurambis Rafinesque, 1831)

Unionopsis Meek, 1876
Meek, 1876, Rept. U.S. Geol. Surv. Terr. (Hayden) 9: 113.
(error for Uniopsis Swainson, 1840)

Bullella Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 672.
Simpson, 1914, Descr. Cat. Naiades: 508.
(intro'd as sub-gen. of Alasmidonta Say, 1818)
Type species: Margaritana arcula Lea, 1838 (orig. desig.) = Alasmidonta arcula

Rugifera Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 670.
Simpson, 1914, Descr. Cat. Naiades: 504.
(intro'd as sub-gen. of Alasmidonta Say, 1818)
Type species: Alasmidonta marginata Say, 1818 (orig. desig.) = Alasmidonta marginata

Jugosus Simpson, 1914
Simpson, 1914, Descr. Cat. Naiades: 357.
(intro'd as sub-gen. of Strophitus Rafinesque, 1820)
Type species: Strophitus wrightianus Walker, 1901 (original designation) = Alasmidonta wrightiana

Decumrambis Modell, 1942
‘Rafinesque’ Modell, 1942, Arch. Moll. 74(5/6): 180.
(error for Decurambis Rafinesque, 1831)

Iugosus Modell, 1964
‘Simpson’ Modell, 1964, Arch. Moll. 93: 91.
(error for Jugosus Simpson, 1914)

Alasmidens Clarke, 1981
Clarke, 1981, Smithson. Contrib. Zool. (326): 35.
(intro'd as sub-gen. of Alasmidonta Say, 1818)
Type species: Alasmidonta mccordi Athearn, 1964 (orig. desig.) = Alasmidonta mccordi

Taxonomic History (since 1900)

Alasmidonta (s.s.) — Simpson (1900), Simpson (1914), Frierson (1927), Haas (1969), Haas (1969), R.I. Johnson (1970), Burch (1975), Clarke (1981), Graf & Cummings (2007), Williams et al. (2014)
Alasmidonta (Pressodonta) — Simpson (1900), Simpson (1914)
Alasmidonta (Rugifera) — Simpson (1900), Ortmann (1909), Simpson (1914)
Alasmidonta (Bullella) — Simpson (1900), Simpson (1914), Frierson (1927), Haas (1969), Haas (1969)
Alasmidonta — Simpson (1900), Ortmann (1909), Ortmann (1909), Ortmann (1909), ..., Chen et al. (2023), Hopper et al. (2023), Wu et al. (2023), Wu et al. (2024)
Unio (Margaritana) — Call (1900)
Strophitus (sec. Jugosus) — Simpson (1914)
Symphynota (Alasminota) — Ortmann (1914)
Unio — de Gregorio (1914)
— de Gregorio (1914), Ortmann (1925), Burch (1975)
Lasmigona (Sulcularia) — Ortmann (1918), Haas (1969), Haas (1969)
Alasmidonta (Decurambis) — Ortmann (1918), Ortmann & Walker (1922), Ortmann (1924), Ortmann (1925), F.C. Baker (1928), Haas (1969), Haas (1969), R.I. Johnson (1970), Clarke (1981), Graf & Cummings (2007)
Lasmigona (Alasminota) — Ortmann & Walker (1922), Ortmann (1923), Ortmann (1924), Ortmann (1925), Clarke (1985), Graf & Cummings (2007)
Alasmidonta (Sulcularia) — Frierson (1927)
Decurambis — Frierson (1927)
Strophitus (Jugosus) — Frierson (1927), Haas (1969), Haas (1969)
Alasmodonta — Thiele (1934)
Alasmodonta (sec. Bullella) — Thiele (1934)
Alasmodonta (sec. Decurambis) — Thiele (1934)
Lasmigona (sec. Sulcularia) — Thiele (1934)
Strophitus — Thiele (1934)
Lasmigona — Morrison (1969), Burch (1975), R.I. Johnson (1980), Turgeon et al. (1988), ..., FMCS (2021), Graf & Cummings (2021), Whelan et al. (2023), Hopper et al. (2023)
Alasmidonta (Alasmidens) — Clarke (1981), Graf & Cummings (2007)