Bivalvia | Unionida | Unionoidea | Unionidae | Gonideinae | Rectidentini | Contradentina

genus Trapezoideus Simpson, 1900: synonymy

5 Recent freshwater species (5 total species)

Synonymy

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)
Type species: Unio foliaceus Gould, 1843 = Trapezoideus foliaceus

Taxonomic History (since 1900)

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

Trapezoideus — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915), Haas (1919), ... Liu et al. (2024), Zieritz et al. (2024), Wu et al. (2024), Jeratthitikul et al. (2024), Konopleva et al. (2025)