| Page last updatedWed 1 October 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 | Popenaiadini | Nephronaias species Nephronaias copanensis (Martens, 1900): synonymy8 specimens
 | Unio (Sphenonaias) tehuantepecensis var. copanensis Martens, 1900
  Martens, 1900. Biol. Centr.-Amer., Moll.: 502, pl. 36, figs. 6-6a. Type(s): LECTOTYPE ZMB_220170 (by Cummings et al., 2025: 248), Copan, Honduras.
 
 Unio (Sphenonaias) tehuantepecensis var. copanensis — Martens (1900)
 Nephronaias copanensis — Simpson (1914), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Cummings et al. (2025)
 Elliptio (Nephronaias) copanensis — Frierson (1927), Haas (1929)
 Nephronaias (s.s.) copanensis — Haas (1969)
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 Taxonomic History (since 1900)Unio (Sphenonaias) tehuantepecensis var. copanensis — Martens (1900)Nephronaias copanensis — Simpson (1914), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Cummings et al. (2025)
 Elliptio (Nephronaias) copanensis — Frierson (1927), Haas (1929)
 Nephronaias (s.s.) copanensis — Haas (1969)
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