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 | ... | Unionidae | Unioninae | Anodontini | Alasmidontina | Pterosyna complanata

nominal species Unio gigas Swainson, 1824

= Pterosyna complanata

Taxonomic Opinions

+ Lasmigona complanata (Barnes, 1823) — Watters et al., 2009

+ Lasmigona complanata (Barnes, 1823) — Williams et al., 2008

+ Lasmigona complanata (Barnes, 1823) — Parmalee & Bogan, 1998

+ Lasmigona (s.s.) complanata complanata (Barnes, 1823) — Clarke, 1985

+ Symphynota (Pterosygna [sic]) complanata (Barnes, 1823) — Simpson, 1914

+ Symphynota (Pterosygna [sic]) complanata (Barnes, 1823) — Simpson, 1900

= Margaron (Unio) gigas (Swain.) — Lea, 1870

= Unio gigas Swainson, 1824 — Sowerby, 1867

= Unio (Metaptera) gigas Lea — Adams & Adams, 1857

+ Unio (Complanaria) complanata (Barnes) — Mörch, 1853

= Margaron (Unio) gigas Swain. — Lea, 1852

= Unio (Megadomus) gigas Sw. — Swainson, 1840

= Margarita (Unio) gigas Lea — Lea, 1838

= Margarita (Unio) gigas “Swain.” — Lea, 1836