| 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 | Castaliini genus Castalia Lamarck, 1819: species4 available nominal genus synonyms (6 total synonyms) | cladomics
 |  Castalia ambigua Lamarck, 1819 syonymy (13 available, 31 total) | specimens (400 + 1 Genbank voucher)
 Range: Widespread, from the Guyanas south to the Paraná, including the Amazon Basin west to Ecuador and Peru. (South America)
 Genbank sequences: 16S, 18S, 28S, COI, ITS1, mtGenome
 IUCN Red List: Least Concern
 other links:  MolluscaBase
 |  |  Castalia cordata Swainson, 1840 syonymy (1 available, 1 total) | specimens (19)
 Range: Orinoco River and the Guyanas, South America. (South America)
 other links:  MolluscaBase
 |  |  Castalia crosseana Hidalgo, 1865 syonymy (1 available, 3 total) | specimens (12)
 Range: Tributaries to the Amazon, Ecuador. (South America)
 other links:  MolluscaBase
 |  |  Castalia ecarinata Mousson, 1869 syonymy (2 available, 2 total) | specimens (19)
 Range: Magdalena River, Colombia. (South America)
 IUCN Red List: Least Concern
 other links:  MolluscaBase
 |  |  Castalia inflata d’Orbigny, 1835 syonymy (1 available, 4 total) | specimens (107)
 Range: Paraná Basin, Argentina to Brazil. (South America)
 Genbank sequences: 16S, COI
 other links:  MolluscaBase
 |  |  Castalia martensi (Ihering, 1891) syonymy (1 available, 2 total) | specimens (66)
 Range: Rivers draining to the Atlantic in southern Brazil and Uruguay. (South America)
 IUCN Red List: Vulnerable A1ae
 other links:  MolluscaBase
 |  |  Castalia multisulcata Hupé, 1857 syonymy (1 available, 3 total) | specimens (5)
 Range: Paraná-Paraguay System?, South America (MUSSELpdb). (South America)
 other links:  MolluscaBase
 |  |  Castalia nehringi (Ihering, 1893) syonymy (1 available, 2 total) | specimens (22)
 Range: Upper Paraná in Brazil and Paraguay. (South America)
 other links:  MolluscaBase
 |  |  Castalia orbignyi (Deville & Hupé, 1850) syonymy (2 available, 4 total) | specimens (1)
 Range: Poorly defined distribution in the “Upper Amazon,” Peru and Brazil. (South America)
 other links:  MolluscaBase
 |  |  Castalia orinocensis Morrison, 1943 syonymy (1 available, 1 total) | specimens (3)
 Range: Orinoco River, Colombia and Venezuela. (South America)
 other links:  MolluscaBase
 |  |  Castalia psammoica (d’Orbigny, 1835) syonymy (2 available, 4 total) | specimens (88)
 Range: Paraná-Paraguay System, Brazil to Argentina. (South America)
 other links:  MolluscaBase
 |  |  Castalia stevensi (H.B. Baker, 1930) syonymy (1 available, 1 total) | specimens (37)
 Range: Orinoco and Essiquibo basins of Colombia, Venezuela and Guyana. (South America)
 Genbank sequences: 18S, COI
 other links:  MolluscaBase
 |  |  Castalia undosa Martens, 1885 syonymy (1 available, 2 total) | specimens (47)
 Range: Upper Paraná Basin in Brazil. (South America)
 other links:  MolluscaBase
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