MUSSELpdb | valid gen. Arcidens synonymy

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Thu 17 July 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

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genus Arcidens Simpson, 1900: synonymy
2 Recent valid species (3 total species)

Arcidens Simpson, 1900
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 661.
Simpson, 1914. Descr. Cat. Naiades: 475.
Type species: Alasmodonta confragosa Say, 1829 (orig. desig.) = Arcidens confragosus

Arkansia Ortmann & Walker, 1912
Ortmann & Walker, 1912. Nautilus 25(9): 97.
Type species: Arkansia wheeleri Ortmann & Walker, 1912 (orig. desig.) = Arcidens wheeleri

Taxonomic History (since 1900)

Arcidens — Simpson (1900), Ortmann (1912), Simpson (1914), Utterback (1915), Frierson (1927), ... Inoue et al. (2020), Graf & Cummings (2021), FMCS (2021), Whelan et al. (2023), Hopper et al. (2023)
Unio (Margaritana) — Call (1900)
Arkansia — Ortmann & Walker (1912), Simpson (1914), Frierson (1927), Thiele (1934), Modell (1957), ... Howells et al. (1996), Turgeon et al. (1998), ITIS (2012), Haag (2012), Inoue et al. (2014)
Arcidens (s.s.) — Clarke (1981), Graf & Cummings (2007)
Arcidens (Arkansia) — Clarke (1981), Graf & Cummings (2007)
A. — Marshall et al. (2018)

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