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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!

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Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Mesonaias Crosse & Fischer, 1894: synonymy
     3 Recent valid species (3 total species)

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.) = Mesonaias explicata

Taxonomic History (since 1900)

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