| 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 | Gonideinae tribe CONTRADENTINI Modell, 1942synonyms (2 nomina) | cladomics
 |  genus Lens Simpson, 1900: 13 Recent species. synonymy (5 available 
             nomina) | 13 species
 Distribution: East Asia
 |  |  genus Physunio Simpson, 1900: 4 Recent species. synonymy (1 available 
             nomina) | 4 species
 Distribution: East Asia
 |  |  genus Pressidens Haas, 1910: 1 Recent species. synonymy (1 available 
             nomina) | 1 species
 Distribution: East Asia
 |  |  genus Solenaia Conrad, 1869: 1 Recent species. synonymy (1 available 
             nomina) | 1 species
 Distribution: East Asia
 |  |  genus Trapezoideus Simpson, 1900: 5 Recent species. synonymy (1 available 
             nomina) | 5 species
 Distribution: East Asia
 |  |  genus Yaukthwa Konopleva, Pfeiffer, Vikhrev, Kondakov, Gofarov, Aksenova, Lunn, Chan & Bolotov, 2019: 11 Recent species. synonymy (1 available 
             nomina) | 11 species
 Distribution: East Asia
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