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Page last updated
Thu 3 September 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!

Search the database pages:

Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Cyrtonaias Crosse & Fischer, 1894: synonymy
     1 Recent valid species (1 total species)

Cyrtonaias Fischer & Crosse, 1894
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 556.
(intro'd as sub-gen. of Unio Retzius, 1788)
Type species: Unio berlandierii Lea, 1857 (orig. desig.) = Cyrtonaias berlandierii

Cyrtonais Frierson, 1927
Frierson, 1927. Check List N. Amer. Naiades: 84.
(error for Cyrtonaias Fischer & Crosse, 1894)

Taxonomic History (since 1900)

Lampsilis (Proptera) — Simpson (1900), Simpson (1914)
Glebula — Simpson (1900), Simpson (1914), Frierson (1927), Clench & Turner (1956), Haas (1969), Burch (1975), Brim Box & Williams (2000), Watters et al. (2009)
Unio (Lampsilis) — Martens (1900)
Lampsilis (Cyrtonaias) — Frierson (1927), Haas (1929), Haas (1969), Haas (1969)
Lampsilis (sec. Cyrtonaias) — Thiele (1934)
Cyrtonaias — Burch (1975), Howells et al. (1996), R.I. Johnson (1998), R.I. Johnson (1999), Graf & Cummings (2007), Bogan (2010), Cummings & Graf (2010), Pfeiffer et al. (2019), Graf & Cummings (2021), Cummings et al. (2025)

 
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