MUSSELpdb | valid sp. Alasmidonta marginata synonymy

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Page last updated
Tue 01 Jul 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

The nominal species (available and otherwise) in this synonymy are listed by usage rather than strictly by publication date. The primary sorting order is by the most recent year (since 1969) that the species name was treated as valid, and then nominal species are sorted secondarily by publication year.

The taxonomic history of the valid species (since 1900) is listed at the bottom of the page.

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species Alasmidonta marginata Say, 1818: nominal species
3 specimens available.

Alasmidonta marginata Say, 1818
Say, 1818, Jour. Acad. Nat. Sci. 1(11): 459.
Say, 1819, Nich. Encyc. 4: sp. 1.
Say, 1858, [in] Binney, Compl. Writings T. Say: 62.

Alasmidonta marginata — Say (1818), Say (1819), Rafinesque (1820), Menke (1830), ..., Whelan et al. (2023), Chen et al. (2023), Hopper et al. (2023), Dai et al. (2025)
Anodonta marginata — Say (1819)
Alasmodonta marginata — Barnes (1823), Ravenel (1834), Ferussac (1835), Linsley (1845), Conrad (1853), Pilsbry & Rhoads (1896)
Lasmigona marginata — Rafinesque (1831)
Alasmadonta marginata — Jay (1835)
Margarita (Margaritana) marginata — Lea (1836), Lea (1838)
Unio marginata — Hanley (1843)
Alasmodon marginata — De Kay (1843)
Margaron (Margaritana) marginata — Lea (1852), Lea (1870)
Unio (Alasmodonta (s.s.)) marginatus — Mörch (1853)
Baphia (Complanaria) marginata — Adams & Adams (1857)
Margaritana marginata — Lapham (1860), Küster (1862), Lewis (1871), B.H. Wright (1888)
Unio marginatus — Sowerby (1866)
Alasmidonta (Rugifera) marginata — Simpson (1900), Ortmann (1909), Simpson (1914)
Unio (Margaritana) marginata — Call (1900)
Alasmidonta (Decurambis) marginata — 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 marginata — Frierson (1927)
Alasmidonta (s.s.) marginata — Burch (1975)
Alasmidonta sp. — Araujo et al. (2018)

Unio rugulosus Wood, 1828
Wood, 1828, Suppl. Index Testac.: 3 [as ‘Mya rugulosa’]. [nomen nudum]
Wood, 1828, Suppl. Index Testac.: 57, pl. 1, sp. 7.

Unio rugulosus — Wood (1828)
Alasmodonta marginata — Ferussac (1835), Conrad (1853)
Margarita (Margaritana) marginata — Lea (1836), Lea (1838)
Unio marginata — Hanley (1843)
Margaron (Margaritana) marginata — Lea (1852), Lea (1870)
Unio (Alasmodonta (s.s.)) marginatus — Mörch (1853)
Margaritana marginata — Küster (1862)
Unio marginatus — Sowerby (1866)
Alasmidonta (Rugifera) marginata — Simpson (1900)
Alasmidonta (Rugifera) varicosa — Simpson (1914)
Alasmidonta (Decurambis) varicosa — R.I. Johnson (1970)
Alasmidonta (s.s.) varicosa — Burch (1975)
Alasmidonta (Decurambis) marginata — Clarke (1981)
Alasmidonta marginata — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Decurambis literata Rafinesque, 1831
Rafinesque, 1831, Continuation: 5. [nomen nudum]
Rafinesque, 1864, [in] Binney & Tryon, reprint: 80.
(intro'd as syn of Decurambis scriptum Rafinesque, 1831)

Decurambis literata — Rafinesque (1831)
Decurambis scriptum — Rafinesque (1831)

Decurambis scriptum Rafinesque, 1831
Rafinesque, 1831, Continuation: 5.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 80.

Decurambis scriptum — Rafinesque (1831)
Alasmodonta marginata — Ferussac (1835)
Alasmidonta scriptum — Simpson (1900), Simpson (1914)
Alasmidonta (Decurambis) marginata — Ortmann & Walker (1922), F.C. Baker (1928), Haas (1969), Haas (1969), Clarke (1981), Graf & Cummings (2007)
Decurambis marginata — Frierson (1927)
Alasmidonta (s.s.) marginata — Burch (1975)
Alasmidonta marginata — Williams et al. (2008), Watters et al. (2009)

Alasmodonta truncata Lea, 1836
‘Say, in lit.’ of Authors.
Lea, 1836, Synopsis Fam. Naiades: 44.
Lea, 1838, Synopsis Fam. Naiades: 27.
Agassiz, 1852, Arch. Naturg. 18(1): 46.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 262.
(intro'd as syn of Alasmidonta marginata Say, 1818)

Alasmodonta truncata — Lea (1836)
Margarita (Margaritana) marginata — Lea (1836), Lea (1838)
Margaron (Margaritana) marginata — Lea (1852), Lea (1870)
Alasmodonta marginata — Conrad (1853)
Alasmidonta (Rugifera) truncata — Simpson (1900)
Alasmidonta (Rugifera) marginata — Simpson (1914)
Decurambis marginata — Frierson (1927)
Alasmidonta (Decurambis) marginata — Haas (1969)
Alasmidonta marginata — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Mya regulosa Lea, 1836
‘Wood’ Lea, 1836, Synopsis Fam. Naiades: 44.
‘Wood’ Lea, 1838, Synopsis Fam. Naiades: 27.
‘Wood’ Lea, 1852, Synopsis Fam. Naiades: 42.
‘Wood’ Lea, 1870, Synopsis Fam. Naiades: 67.
(error for Unio rugulosus Wood, 1828)

Mya regulosa — Lea (1836)

Margaritana marginata Küster, 1862
‘Say’ of Authors.
Küster, 1862, Conchyl. Cab. 9(2): 297, pl. 99, fig. 3.
Sowerby, 1866, Conch. Icon. 16: pl. 51, sp. 267.
(reference to Alasmidonta marginata Say, 1818)

Margaritana marginata — Küster (1862)
Margaron (Margaritana) marginata — Lea (1870)
Alasmidonta (Rugifera) truncata — Simpson (1900)
Alasmidonta (Rugifera) marginata — Simpson (1914)
Alasmidonta marginata — Watters et al. (2009)

Margaritana marginata var. truncata B.H. Wright, 1898
B.H. Wright, 1898, Nautilus 11(11): 124.
(intro'd as intra-sp. of Alasmidonta marginata Say, 1818)
Type(s): LECTOTYPE USNM_150545, Clinch R., Va.

Margaritana marginata var. truncata — B.H. Wright (1898)
Alasmidonta (Rugifera) truncata — Simpson (1900)
Alasmidonta marginata — Ortmann (1909), R.I. Johnson (1980), Strayer & Jirka (1997), Watters et al. (2009)
Alasmidonta (Rugifera) marginata — Ortmann (1909)
Alasmidonta (Decurambis) marginata truncata — F.C. Baker (1928)
Alasmidonta (Decurambis) marginata — Clarke (1981)

Unio calceolus f.a sciotincola de Gregorio, 1914
de Gregorio, 1914, Il Nat. Siciliano 2: 54, pl. 9, figs. 3a-d.
(intro'd as intra-sp. of Unio calceolus Lea, 1828)

Unio calceolus f.a sciotincola — de Gregorio (1914)
Alasmidonta marginata — Watters et al. (2009)

Alasmidonta (Decurambis) marginata susquehannae Ortmann, 1919
Ortmann, 1919, Mem. Carnegie Mus. 8(1): 187, pl. 12, fig. 4.
(intro'd as intra-sp. of Alasmidonta marginata Say, 1818)
Type(s): LECTOTYPE CM_61.4679, Susquehanna River, Selins Grove, Snyder County, Pennsylvania.

Alasmidonta (Decurambis) marginata susquehannae — Ortmann (1919)
Decurambis marginata — Frierson (1927)
Alasmidonta (Decurambis) marginata — Haas (1969), Clarke (1981)
Alasmidonta (s.s.) marginata — Burch (1975)
Alasmidonta marginata — Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)

Alasmidonta (Decurambis) marginata variabilis F.C. Baker, 1928
F.C. Baker, 1928, Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 194, pl. 69, figs. 4-9.
(intro'd as intra-sp. of Alasmidonta marginata Say, 1818)
Type(s): LECTOTYPE UMMZ_209183, Red Cedar R., Chetek, Wis.

Alasmidonta (Decurambis) marginata variabilis — F.C. Baker (1928)
Alasmidonta (Decurambis) marginata variabilis — F.C. Baker (1928)
Alasmidonta marginata — R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008), Watters et al. (2009)
Alasmidonta (Decurambis) marginata — Clarke (1981)

Taxonomic History (since 1900)

Alasmidonta (Rugifera) marginata — Simpson (1900), Ortmann (1909), Simpson (1914)
Unio (Margaritana) marginata — Call (1900)
Alasmidonta scriptum — Simpson (1900), Simpson (1914)
Alasmidonta (Rugifera) truncata — Simpson (1900)
Alasmidonta marginata — Fox (1901), Ortmann (1909), Ortmann (1909), Ortmann (1910), ..., Whelan et al. (2023), Chen et al. (2023), Hopper et al. (2023), Dai et al. (2025)
Alasmidonta (Rugifera) varicosa — Simpson (1914)
Unio calceolus f.a sciotincola — de Gregorio (1914)
Alasmidonta (Decurambis) marginata — 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)
Alasmidonta (Decurambis) marginata susquehannae — Ortmann (1919)
Decurambis marginata — Frierson (1927)
Alasmidonta (Decurambis) marginata truncata — F.C. Baker (1928)
Alasmidonta (Decurambis) marginata variabilis — F.C. Baker (1928)
Alasmidonta (Decurambis) marginata variabilis — F.C. Baker (1928)
Alasmidonta (Decurambis) varicosa — R.I. Johnson (1970)
Alasmidonta (s.s.) marginata — Burch (1975)
Alasmidonta (s.s.) varicosa — Burch (1975)
Alasmidonta sp. — Araujo et al. (2018)

Page updated: 09:59:40 Tue 01 Jul 2025

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