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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 | ... | Unionidae | Ambleminae | Lampsilini | Ptychobranchus

species Ptychobranchus occidentalis (Conrad, 1836): synonymy
     2 specimens

Unio occidentalis Conrad, 1836
Conrad, 1836. Monogr. Fam. Unionidae 1(7): 64, pl. 36, fig. 1.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 253.
Type(s): TYPE LOST ANSP_UNKNOWN, Currant River, Arkansas.

Lampsilis (sec. Eurynia) occidentalisSimpson (1900)
Lampsilis (Eurynia) occidentalisSimpson (1914)
Ptychobranchus occidentaleOrtmann (1925)
Ptychobranchus (s.s.) occidentalisFrierson (1927), Haas (1969)
Ptychobranchus occidentalisBurch (1975), Gordon et al. (1979), R.I. Johnson (1980), Oesch (1984), Turgeon et al. (1988), ... Roe (2013), Williams et al. (2017), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023)

Ptychobranchus clintonensis Simpson, 1900
Simpson, 1900. Proc. Acad. Nat. Sci. 52: 79, pl. 5, fig. 3.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 613.
Simpson, 1914. Descr. Cat. Naiades: 335.
Type(s): HOLOTYPE USNM_124615, Little Red R., near Clinton, Ark.

Ptychobranchus clintonensisSimpson (1900), Simpson (1900), Ortmann (1912)
Ptychobranchus clintonenseSimpson (1914)
Ellipsaria clintonensisUtterback (1916)
Ptychobranchus (s.s.) occidentalisFrierson (1927), Haas (1969)
Ptychobranchus occidentalisR.I. Johnson (1980), Oesch (1984)

Taxonomic History (since 1900)

Lampsilis (sec. Eurynia) occidentalisSimpson (1900)
Ptychobranchus clintonensisSimpson (1900), Simpson (1900), Ortmann (1912)
Lampsilis (Eurynia) occidentalisSimpson (1914)
Ptychobranchus clintonenseSimpson (1914)
Ellipsaria clintonensisUtterback (1916)
Ptychobranchus occidentaleOrtmann (1925)
Ptychobranchus (s.s.) occidentalisFrierson (1927), Haas (1969)
Ptychobranchus occidentalisBurch (1975), Gordon et al. (1979), R.I. Johnson (1980), Oesch (1984), Turgeon et al. (1988), ... Roe (2013), Williams et al. (2017), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023)

 
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