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Unionidae

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Data last updated
Mon 1 Dec 2025

Bivalvia | Unionoida | Unionoidea | Unionidae | Unioninae | Anodontini | Alasmidontina

genus Simpsonaias Frierson, 1914: synonymy

1 Recent freshwater species (1 total species)

Synonymy

Simpsoniconcha Frierson, 1914

Frierson, 1914. Nautilus 28: 40.
(new name for Simpsonaias Frierson, 1914)
Type species: Alasmodonta ambigua Say, 1825 = Simpsonaias ambigua

Simpsonaias Frierson, 1914

Frierson, 1914. Nautilus 28: 7.
(renamed Simpsoniconcha Frierson, 1914)
Type species: Alasmodonta ambigua Say, 1825 (orig. desig.) = Simpsonaias ambigua

Hemilastena Simpson, 1900

‘Agassiz’ Simpson, 1900. Proc. U.S. Nat. Mus. 22: 673.
‘Agassiz’ Simpson, 1914. Descr. Cat. Naiades: 323.
(reference to Hemilastena Agassiz, 1852)
Type species: Alasmodonta ambigua Say, 1825 (orig. desig.) = Simpsonaias ambigua

Simpsonais Whelan et al., 2023

Whelan et al., 2023. Zool. J. Linn. Soc. 198(2): Table S1.
(error for Simpsonaias Frierson, 1914)
Type species: Alasmodonta ambigua Say, 1825 = Simpsonaias ambigua

Taxonomic History (since 1900)

The Taxonomic History lists the ways authors have classified the species currently assigned to Simpsonaias, since 1900.

Hemilastena — Simpson (1900), Simpson (1914)
Unio (Margaritana) — Call (1900)
Simpsoniconcha — Walker (1918), Frierson (1927), F.C. Baker (1928), Thiele (1934), Stansbery (1970), Burch (1975), Heard (1975), Gordon et al. (1979), Mathiak (1979), R.I. Johnson (1980), Mackie et al. (1980)
Simpsonaias — Haas (1969), Haas (1969), Oesch (1984), Clarke (1985), Turgeon et al. (1988), ... Graf & Cummings (2021), FMCS (2021), Jeratthitikul et al. (2022), Hopper et al. (2023), FMCS (2025)
Simpsonais [sic] — Whelan et al. (2023)

 
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