MUSSELpdb | valid gen. Sphenonaias synonymy

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Page last updated
Thu 17 July 2025

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

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genus Sphenonaias Crosse & Fischer, 1894: synonymy
5 Recent valid species (5 total species)

Sphenonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 557.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio liebmanni Philippi, 1847 (orig. desig.) = Sphenonaias liebmanni

Taxonomic History (since 1900)

Unio (sec. Elliptio) — Simpson (1900), Simpson (1914)
Unio (Sphenonaias) — Martens (1900)
Unio (Elliptio) — Martens (1900)
Unio (Simonaias) — Martens (1900)
Unio (Nephronaias) — Martens (1900)
Nephronaias — Bartsch (1906), Simpson (1914)
Elliptio (Sphenonaias) — Frierson (1927)
Elliptio (Barynaias) — Haas (1929)
Elliptio (Nephronaias) — Haas (1929)
Lampsilis (Cyrtonaias) — Haas (1929)
Nephronaias (Sphenonaias) — Haas (1969), Haas (1969)
Sphenonaias — Graf & Cummings (2007), Bogan (2010), Pfeiffer et al. (2019), Inoue et al. (2020), Graf & Cummings (2021), Czaja et al. (2023), Freeman et al. (2025)

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