Page last updated
Thu 3 September 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 | ... | Unionoidea | Unionidae | Unioninae | Unionini | Unio crassus

nominal species Unio rubens Menke, 1828

= Unio crassus

Taxonomic Opinions

+ Unio crassus Philipsson in Retzius, 1788 — Lopes-Lima et al., 2024

+ Unio (Crassiana) crassus Retzius, 1788 — Vinarski & Kantor, 2016

+ Pleurobema sintoxia (Rafinesque, 1820) — Williams et al., 2008

+ Pleurobema sintoxia (Rafinesque, 1820) — Parmalee & Bogan, 1998

+ Unio crassus crassus Retzius, 1788 — Haas, 1969

+ Unio crassus crassus Retzius, 1788 — Haas, 1940

+ Quadrula (Obliquata) coccinea (Conrad, 1836) — Frierson, 1927

+ Quadrula (sec. Fusconaia) coccinea (Conrad, 1836) — Simpson, 1914

+ Quadrula (sec. Fusconaia) coccinea (Conrad, 1836) — Simpson, 1900

= Unio crassus var. rubens Menke, 1830 — Westerlund, 1890

+ Margaron (Unio) batavus (Mat. & Ract.) — Lea, 1870

= Unio (Lymnium) crassus var. — Drouët, 1857

+ Unio crassus Retz. — Küster, 1854

+ Margaron (Unio) batavus (Lam.) — Lea, 1852

+ — Lea, 1838

= Unio rubens Mke. — Rossmässler, 1837

+ — Lea, 1836

= Unio rubens Menke, 1828 — Menke, 1830

= Unio rubens Menke, 1828 — Menke, 1828