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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 Actinonaias Crosse & Fischer, 1894: synonymy
     5 Recent valid species (8 total species)

Actinonaias 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 sapotalensis Lea, 1841 (orig. desig.) = Actinonaias sapotalensis

Graphonaias 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 medellinus Lea, 1838 (orig. desig.) = Actinonaias medellina

Actionaias Ortmann, 1925
Ortmann, 1925. Amer. Midl. Nat. 9: 349.
(error for Actinonaias Fischer & Crosse, 1894)

Graptonaias Haas, 1969
Haas, 1969. Treatise on Invert. Paleo: N425.
(error for Graphonaias Fischer & Crosse, 1894)

Taxonomic History (since 1900)

Lampsilis (Proptera)Simpson (1900), Simpson (1914)
NephronaiasSimpson (1900), Ihering (1901), Ortmann (1912), Simpson (1914), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Cummings et al. (2025)
Unio (Simonaias)Martens (1900)
Unio (Lampsilis)Martens (1900)
Unio (Elliptio)Martens (1900)
LampsilisPilsbry (1910), Simpson (1914)
ActinonaiasFrierson (1917), Thiele (1934), Modell (1957), Haas (1969), Haas (1969), Graf & Cummings (2007), Bogan (2010), Bogan (2013), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025)
Lampsilis (Actinonaias)Frierson (1927), Haas (1929)
Lampsilis (Cyrtonaias)Frierson (1927), Haas (1969)
Lampsilis (Friersonia)Haas (1929)
Elliptio (Nephronaias)Haas (1929)
UnioHenderson (1935)
Nephronaias (s.s.)Haas (1969)
VillosaJohnson (1981)

 
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