Bivalvia | Unionida | Unionoidea | Unionidae | Gonideinae | Gonideini
1 Recent freshwater species (2 total species)
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
Bolotov & Konopleva in Bolotov et al., 2023. Water 15: 30, Table.
(new name for Nasus Simpson, 1900)
Type species: Monocondylea nankingensis Heude, 1874 = Simpsonasus nankingensis
The Taxonomic History lists the ways authors have classified the species currently assigned to Simpsonasus, since 1900.
Pseudodon (sec. Nasus) — Simpson (1900), Simpson (1914), Thiele (1934)
Pseudodon (Nasus) — Haas (1920), Haas (1969), Haas (1969), Graf & Cummings (2007)
Nasus — Modell (1957), Prozorova et al. (2005)
Pseudodon — Hu (2005), Bogan (2010), Xiong et al. (2012), He & Zhuang (2013), Zieritz et al. (2018), Liu et al. (2020), Graf & Cummings (2021)
Simpsonasus — Bolotov et al. (2023)