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 | ... | Unionoidea | Unionidae | Ambleminae | Pleurobemini | Fusconaia masoni nominal species Unio castus Lea, 1860  Lea, 1860. Proc. Acad. Nat. Sci. 12: 306.
Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 8]: 349 [31], pl. 57, fig. 174.
Type(s): HOLOTYPE USNM_84782, S.C.
= Fusconaia masoni Taxonomic Opinions+ Fusconaia masoni (Conrad, 1834) — Burch, 1975 + Pleurobema (Lexingtonia) masoni (Conrad, 1834) — R.I. Johnson, 1970 = Lexingtonia casta (Lea, 1860) — Haas, 1969 = Pleurobema (Lexingtonia) castum (Lea, 1860) — Frierson, 1927 + Unio (sec. Elliptio) merus Lea, 1852 — Simpson, 1914 = Unio castus Lea — de Gregorio, 1914 + Unio (sec. Elliptio) merus Lea, 1852 — Simpson, 1900 = Unio castus Lea — B.H. Wright, 1888 = Margaron (Unio) castus (Lea) — Lea, 1870
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