Page last updated
Thu 07 Sep 2023

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!

For each valid genus, the nominal generic synonyms are listed. The taxonomic history (since 1900) at the bottom of the page lists the genera to which all of the currently included species have been classified.

Search the database pages:

Bivalvia | Unionoida | Unionoidea | Unionidae | Gonideinae | Contradentini

genus Trapezoideus Simpson, 1900: nominal genera
     5 valid species

Trapezoideus Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 858.
Simpson, 1914, Descr. Cat. Naiades: 1180.
Type species: Unio foliaceus Gould, 1843 (orig. desig.) = Trapezoideus foliaceus

Trapezioideus Starobogatov, 1970
‘Simpson’ Starobogatov, 1970, Fauna Moll. Continent.: 61.
(error for Trapezoideus Simpson, 1900)

Taxonomic History (since 1900)

TrapezoideusSimpson (1900), Preston (1912), Simpson (1914), Preston (1915), ..., Jeratthitikul et al. (2021), Bolotov et al. (2022), Jeratthitikul et al. (2022), Konopleva et al. (2023)

Page updated: 10:01:16 Thu 07 Sep 2023

NSF icon MUSSEL icon
"Making the world a better place, one mollusk at a time."