MUSSELpdb

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)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

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(59-60): 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)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

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’ Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 83.
‘Say’ Woodward, 1871. Man. Moll: 433.
(error for Alasmodonta Say, 1819; renamed Anelasmodon Agassiz, 1846)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

Alismadon Fleming, 1828

Fleming, 1828. Hist. Brit. Anim.: 408.
(error for Alasmodon Thompson, 1820)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

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

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)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

Anelasmodonta Herrmannsen, 1846

Herrmannsen, 1846. Ind. Gener. Malacol. 1: 27, 54.
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

Unionopsis Meek, 1876

Meek, 1876. Rept. U.S. Geol. Surv. Terr. (Hayden) 9: 113.
(error for Uniopsis Swainson, 1840)
Type species: Uniopsis mytiloides Swainson, 1840 = Alasmidonta undulata

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

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

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

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

Alasmisodonta Blainville, 1825

‘Say’ Blainville, 1825. Manuel Malacol. et Conch.: 630, 639.
(error for Alasmidonta Say, 1818)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

Alasmadonta Jay, 1835

Jay, 1835. Cat. Rec. Shells: 18.
(error for Alasmidonta Say, 1818)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

Alasmedonta Gray, 1847

‘Say’ Gray, 1847. Proc. Zool. Soc. London 15: 196.
(error for Alasmidonta Say, 1818)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

Alasmesodonta Gray, 1847

‘Blainv.’ Gray, 1847. Proc. Zool. Soc. London 15: 196.
(error for Alasmisodonta Blainville, 1825)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata

Decarambis Paetel, 1875

‘Rafnq.’ Paetel, 1875. Fam. Gatt. Moll.: 67.
(error for Decurambis Rafinesque, 1831)
Type species: Decurambis scriptum Rafinesque, 1831 = Alasmidonta marginata

Decumrambis Modell, 1942

‘Rafinesque’ Modell, 1942. Arch. Moll. 74(5/6): 180.
(error for Decurambis Rafinesque, 1831)
Type species: Decurambis scriptum Rafinesque, 1831 = Alasmidonta marginata

Iugosus Modell, 1964

‘Simpson’ Modell, 1964. Arch. Moll. 93: 91.
(error for Jugosus Simpson, 1914)
Type species: Strophitus wrightianus Walker, 1901 = Alasmidonta wrightiana

Taxonomic History (since 1900)

The Taxonomic History lists the ways authors have classified the species currently assigned to Alasmidonta, 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 (Rugifera) — Simpson (1900), Ortmann (1909), Simpson (1914)
Alasmidonta (Bullella) — Simpson (1900), Simpson (1914), Frierson (1927), Haas (1969), Haas (1969)
Alasmidonta — Simpson (1900), Fox (1901), Ortmann (1909), Ortmann (1909), Ortmann (1909), ... Perkins et al. (2025), FMCS (2025), Hou et al. (2025), Wang et al. (2025), Chen et al. (2025)
Unio (Margaritana) — Call (1900)
Strophitus (sec. Jugosus) — Simpson (1914)
Unio — de Gregorio (1914)
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)
Decurambis — Frierson (1927)
Strophitus (Jugosus) — Frierson (1927), Haas (1969), Haas (1969)
Alasmodonta — Thiele (1934)
Alasmodonta (sec. Bullella) — Thiele (1934)
Alasmodonta (sec. Decurambis) — Thiele (1934)
Strophitus — Thiele (1934)
Alasmidonta (Alasmidens) — Clarke (1981), Graf & Cummings (2007)