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Page last updated
Thu 17 July 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!


Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Cyrtonaias Crosse & Fischer, 1894: synonymy
     4 Recent valid species (4 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 tampicoensis

Mesonaias 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 explicatus Morelet, 1849 (orig. desig.) = Cyrtonaias explicata

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)
Unio (Lampsilis)Martens (1900)
Unio (Uniomerus)Martens (1900)
Unio (Elliptio)Martens (1900)
LampsilisIhering (1901), Pilsbry (1904), Pilsbry (1910), R.I. Johnson (1998), Contreras-Arquieta (2000)
Uniode Gregorio (1914)
Lampsilis (Cyrtonaias)Frierson (1927), Haas (1929), Haas (1969), Haas (1969)
PropteraFrierson (1927), Haas (1969)
Lampsilis (sec. Mesonaias)Thiele (1934)
Lampsilis (sec. Cyrtonaias)Thiele (1934)
Lampsilis (Mesonaias)Haas (1969), Haas (1969)
CyrtonaiasBurch (1975), Turgeon et al. (1988), Williams et al. (1993), Howells et al. (1996), Turgeon et al. (1998), ... Graf & Cummings (2021), FMCS (2021), Czaja et al. (2023), Hopper et al. (2023), Freeman et al. (2025)
MesonaiasContreras-Arquieta (2000)
PotamilusGraf & Cummings (2007), Bogan (2010), Czaja et al. (2023)
ActinonaiasWatters et al. (2009)

 
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