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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 | ... | Unionoidea | Unionidae | Ambleminae | Lampsilini | Friersonia iridella

Specimen USNM_1282429: Images
     Friersonia iridella (Pilsbry & Frierson, 1908), Tamaulipas, creek flowing into Rio Frio ca. 0.5 rivermiles (not measured) above bridge of Rt. Mex. 85 over Rio Frio at Rio Frio (town)

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