MUSSELpdb
Taxonomy
Species & Genus Richness of
freshwater mussels
by Taxonomy
Species & Genus Richness of
freshwater bivalves
by Family
Geography
Species Richness & Endemism of
freshwater mussels
by Geography
Data last updated
Thu 22 January 2026
Bivalvia | ... | Unionidae | Unioninae | Anodontini | Alasmidontina | Simpsonaias ambigua
nominal species Alasmodonta ambigua Say, 1825
Alasmodonta ambigua Say, 1825 = Simpsonaias ambigua
Say, 1825. Jour. Acad. Nat. Sci. 5(3-4): 131.
Say, 1858. [in] Binney, Compl. Writings T. Say: 118.
Taxonomic Opinions
= Simpsonaias ambigua (Say, 1825) — FMCS, 2025
= Simpsonais [sic] ambigua — Whelan et al., 2023
= Simpsonaias ambigua (Say, 1825) — Hopper et al., 2023
= Simpsonaias ambigua (Say, 1825) — Jeratthitikul et al., 2022
= Simpsonaias ambigua (Say, 1825) — Graf & Cummings, 2021
= Simpsonaias ambigua (Say, 1825) — FMCS, 2021
= Simpsonaias ambigua — Lopes-Lima et al., 2020
= Simpsonaias ambigua (Say, 1825) — Huang et al., 2019
= Simpsonaias ambigua (Say, 1825) — Bolotov et al., 2018
= Simpsonaias ambigua Say, 1825 — IUCN, 2017
= Simpsonaias ambigua (Say, 1825) — Lopes-Lima et al., 2017
= Simpsonaias ambigua (Say, 1825) — Bolotov et al., 2017
= Simpsonaias ambigua (Say, 1825) — Bolotov et al., 2017
= Simpsonaias ambigua (Say, 1825) — Williams et al., 2017
= Simpsonaias ambigua (Say, 1825) — ITIS, 2012
= Simpsonaias ambigua — Haag, 2012
= Simpsonaias ambigua (Say, 1825) — McMurray et al., 2012
= Simpsonaias ambigua Say, 1825 — Bogan, 2010
= Simpsonaias ambigua — Cummings & Graf, 2010
= Simpsonaias ambigua (Say, 1825) — Watters et al., 2009
= Simpsonaias ambigua (Say, 1825) — Graf & Cummings, 2007
= Simpsonaias ambigua (Say, 1825) — Cicerello & Schuster, 2003
= Simpsonaias ambigua — Sietman, 2003
= Simpsonaias ambigua (Say, 1825) — Graf, 2002
= Simpsonaias ambigua (Say, 1825) — Parmalee & Bogan, 1998
= Simpsonaias ambigua (Say, 1825) — Turgeon et al., 1998
= Simpsonaias ambigua (Say) — Strayer & Jirka, 1997
= Simpsonaias ambigua (Say, 1825) — Cummings & Mayer, 1997
= Simpsonaias ambigua (Say) — Williams et al., 1993
= Simpsonaias ambigua (Say, 1825) — Cummings & Mayer, 1992
= Simpsonaias ambigua (Say, 1825) — Turgeon et al., 1988
= Simpsonaias ambigua (Say, 1825) — Clarke, 1985
= Simpsonaias ambigua (Say, 1825) — Oesch, 1984
= Simpsoniconcha ambigua (Say, 1825) — R.I. Johnson, 1980
= Simpsoniconcha ambigua (Say) — Mackie et al., 1980
= Simpsoniconcha ambigua — Gordon et al., 1979
= Simpsoniconcha ambigua (Say) — Mathiak, 1979
= Simpsoniconcha ambigua (Say, 1825) — Burch, 1975
= Simpsoniconcha ambigua (Say) — Heard, 1975
= Simpsoniconcha ambigua (Say, 1825) — Stansbery, 1970
= Simpsonaias ambigua (Say, 1825) — Haas, 1969
= Simpsonaias ambigua (Say, 1825) — Haas, 1969
= Simpsoniconcha ambigua (Say) — Thiele, 1934
= Simpsoniconcha ambigua (Say, 1825) — F.C. Baker, 1928
= Simpsoniconcha ambigua (Say, 1825) — Frierson, 1927
= Simpsoniconcha ambigua (Say) — Walker, 1918
= Hemilastena ambigua (Say, 1825) — Simpson, 1914
= Hemilastena ambigua (Say, 1825) — Simpson, 1900
+ Margaron (Margaritana) hildrethiana (Lea) — Lea, 1870
= Margaritana ambigua Say — Küster, 1862
+ Unio hildrethianus Lea — Küster, 1861
= Hemilastena [sic] ambigua Agass. — Agassiz, 1852
+ Margaron (Margaritana) hildrethiana (Lea) — Lea, 1852
+ Unio hildrethianus Lea — Hanley, 1843
+ Margarita (Unio) hildrethianus Lea — Lea, 1838
+ Margarita (Unio) hildrethianus (Lea, 1834) — Lea, 1836
= Alasmodonta ambigua Say — Ferussac, 1835
