Bivalvia | Unionida | Unionoidea | Unionidae | Gonideinae | Gonideini

genus Ptychorhynchus Simpson, 1900: synonymy

4 Recent freshwater species (4 total species)

Synonymy

Ptychorhynchus Simpson, 1900

Simpson, 1900. Proc. U.S. Nat. Mus. 22: 850.
Simpson, 1914. Descr. Cat. Naiades: 1144.
Type species: Unio pfisteri Heude, 1874 (orig. desig.) = Ptychorhynchus pfisteri

Heudeana Frierson, 1922

(intro'd as sub-gen. of Margaritana Schumacher, 1817)
Frierson, 1922. Nautilus 36: 43.
Type species: Unio murinus Heude, 1883 (original designation) = Ptychorhynchus murinum

Taxonomic History (since 1900)

The Taxonomic History lists the ways authors have classified the species currently assigned to Ptychorhynchus, since 1900.

Ptychorhynchus — Simpson (1900), Simpson (1914), Haas (1924), Thiele (1934), Haas (1969), ... Dai et al. (2025), Chen et al. (2025), Chen et al. (2025), Campbell & Lydeard (2026), Wu et al. (2026)
Parreysia (s.s.) — Simpson (1900), Simpson (1914)
Hyriopsis (s.s.) — Simpson (1900)
Nodularia (s.s.) — Haas (1911), Simpson (1914)
Hyriopsis (s.s.) (Group of Hyriopsis myersiana) — 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)
Middendorffinaia (Pseudopotomida) — Moskvicheva & Starobogatov (1973)
Nodularia — Prozorova et al. (2005), Graf & Cummings (2007), Bogan (2010)
Nasus — Prozorova et al. (2005)
Hyriopsis — Graf & Cummings (2007), Bogan (2010)