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Wed 1 October 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 | Gonideinae | Contradentini | Lens contradens

nominal species Unio semidecoratus Morlet, 1889

= Lens contradens

Taxonomic Opinions

+ Lens contradens (Lea, 1838), comb. nov. — Pfeiffer et al., 2021

+ Contradens contradens (Lea, 1838) — Do et al., 2018

+ Uniandra contradens tumidula (Lea, 1856) — Brandt, 1974

+ Ensidens (Uniandra) inaequalis (Rochebrune, 1882) — Haas, 1969

+ Nodularia (s.s.) inaequalis (Rochebrune, 1882) — Simpson, 1914

+ Ensidens (sec. Uniandra) inaequalis (Rochebrune, 1882) — Haas, 1913

= Nodularia (s.s.) semidecorata (Morlet, 1889) — Simpson, 1900

= Unio semidecoratus L. Morlet — Fischer, 1891

= Unio semidecoratus nov. sp. — Morlet, 1889