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!

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Unionoida | Unionoidea | Unionidae | Ambleminae | Pleurobemini | Pleurobema decisum

nominal species Unio scalenius Say, 1834

Say, 1834, Amer. Conch. 6: ??.
(misidentified reference to Obliquaria (Scalenaria) scalenia Rafinesque, 1820)

= Pleurobema decisum

Taxonomic Opinions

+ Pleurobema (s.s.) decisus (Lea, 1831) — Frierson, 1927
+ Pleurobema (s.s.) decisum (Lea, 1831) — Simpson, 1914
+ Pleurobema (s.s.) decisa (Lea, 1831) — Simpson, 1900
+ Unio decisus Lea — Ferussac, 1835

Page updated: 08:16:57 Tue 01 Jul 2025