| 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 | Hyrioidea | Hyriidae | Hyriinae | Hyriini genus Prisodon Schumacher, 1817: species5 available nominal genus synonyms (11 total synonyms) | cladomics
 |  Prisodon obliquus Schumacher, 1817 syonymy (10 available, 13 total) | specimens (156)
 Range: Amazon Basin in Brazil and Peru, north to Venezuela and the Guayanas. (South America)
 Genbank sequences: 16S, 18S, mtGenome
 IUCN Red List: Data Deficient
 other links:  MolluscaBase
 |  |  Prisodon syrmatophorus (Gmelin, 1791) syonymy (6 available, 14 total) | specimens (207)
 Range: Northeastern South America, from the Orinoco and Guyana to the lower Amazon. (South America)
 Genbank sequences: 16S, 18S, COI, ITS1
 IUCN Red List: Least Concern
 other links:  MolluscaBase
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