Page last updated
Wed 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!

Bivalvia | Unionoida | Unionoidea | Unionidae | Gonideinae | Gonideini

genus Ptychorhynchus Simpson, 1900: synonymy
     5 Recent freshwater species (5 total species)

Taxonomic History (since 1900)

Ptychorhynchus — Simpson (1900), Simpson (1914), Haas (1924), Thiele (1934), Haas (1969), ... Dai et al. (2024), Zhang et al. (2024), Dai et al. (2025), Dai et al. (2025), Chen et al. (2025)
Parreysia (s.s.) — Simpson (1900), Simpson (1914)
Hyriopsis (s.s.) — Simpson (1900), Simpson (1914)
Nodularia (s.s.) — Haas (1911), Simpson (1914)
Pseudodon — Simpson (1914), Bogan (2010), He & Zhuang (2013), Zieritz et al. (2018), Liu et al. (2020), Graf & Cummings (2021)
Pseudodon (s.s.) — Haas (1924), Haas (1969), Graf & Cummings (2007)
Heudeana — Modell (1942), Haas (1969), Prozorova et al. (2005)
Unio — Haas (1969), Liu et al. (1979), Hu (2005)
Middendorffinaia (Pseudopotomida) — Moskvicheva & Starobogatov (1973)
Nodularia — Prozorova et al. (2005), Graf & Cummings (2007), Bogan (2010)
Nasus — Prozorova et al. (2005)
Pseudobaphia — Prozorova et al. (2005), Graf & Cummings (2007), Graf & Cummings (2021)
Hyriopsis — Graf & Cummings (2007), Bogan (2010)
Lamellidens — He & Zhuang (2013), Bogan & Do (2018), Zieritz et al. (2018), Liu et al. (2020)