| 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 | ... | Hyrioidea | Hyriidae | Hyriinae | Castaliini | Castalia undosa Specimen SMF_11738: ImagesCastalia undosa Martens, 1885, Rio Grande, Grenze der Staaten [that borders], Sao Paulo u Minas Geraes, Brasilien
 
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