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 | Popenaiadini | Nephronaias caldwellii nominal species Unio caldwellii Lea, 1858  Lea, 1858. Proc. Acad. Nat. Sci. 10: 118.
 Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 7]: 265 [83], pl. 43, fig. 145.
Type(s): HOLOTYPE (MONOTYPY) USNM_84396, Isthmus of Darien.
= Nephronaias caldwellii Taxonomic Opinions= Nephronaias caldwellii (Lea, 1858) — Cummings et al., 2025 = Barynaias caldwellii (Lea, 1858) — Graf & Cummings, 2021 = Barynaias caldwellii Lea, 1858 — Bogan, 2010 = Barynaias caldwellii (Lea, 1858) — Graf & Cummings, 2007 = Barynaias caldwellii (Lea, 1858) — Haas, 1969 + Elliptio (Nephronaias) averyi (Lea) — Haas, 1929 + Elliptio (Barynaias) averyi (Lea, 1859) — Frierson, 1927 = Nephronaias caldwellii (Lea, 1858) — Simpson, 1914 = Nephronaias caldwellii (Lea, 1858) — Simpson, 1900 = Unio (Arotonaias) caldwellii Lea, 1858 — Martens, 1900 = Unio caldwellii Lea — B.H. Wright, 1888 = Margaron (Unio) caldwellii (Lea) — Lea, 1870 = Unio caldwellii Lea, 1858 — Sowerby, 1868
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