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Page last updated
Thu 17 July 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 Simpsonasus Bolotov & Konopleva in Bolotov et al., 2023: synonymy
     1 Recent valid species (2 total species)

Nasus Simpson, 1900
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 839.
Simpson, 1914. Descr. Cat. Naiades: 1099.
(homonym of Basilewski, 1855 [Pisces]; intro'd as sub-gen. of Pseudodon Gould, 1844; renamed Simpsonasus Bolotov et al., 2023)
Type species: Monocondylea nankingensis Heude, 1874 (orig. desig.) = Simpsonasus nankingensis

Simpsonasus Bolotov et al., 2023
Bolotov & Konopleva in
Bolotov et al., 2023. Water 15: 30, Table.
(new name for Nasus Simpson, 1900)

Taxonomic History (since 1900)

Pseudodon (sec. Nasus)Simpson (1900), Simpson (1914), Thiele (1934)
Pseudodon (Nasus)Haas (1920), Haas (1969), Haas (1969), Graf & Cummings (2007)
NasusModell (1957), Prozorova et al. (2005)
PseudodonHu (2005), Bogan (2010), Xiong et al. (2012), He & Zhuang (2013), Zieritz et al. (2018), Liu et al. (2020), Graf & Cummings (2021)
SimpsonasusBolotov et al. (2023)

 
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