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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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Bivalvia | ... | Unionidae | Gonideinae | Rectidentini | Contradentina | Lens contradens nominal species Unio sumatrensis Lea, 1859  Lea, 1859. Proc. Acad. Nat. Sci. 11: 153.
 Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 7]: 239 [57], pl. 34, fig. 118.
(renamed Margaron (Unio) dimotus Lea, 1870; homonym of Unio sumatrensis Dunker, 1852)
Type(s): HOLOTYPE USNM_84059, Sumatra.
= Lens contradens Taxonomic Opinions+ Lens contradens (Lea, 1838), comb. nov. — Pfeiffer et al., 2021 + Contradens contradens (I. Lea, 1838) — Bieler, 2021 + Uniandra contradens dimotus (Lea, 1870) — Brandt, 1974 + Contradens ascia (Hanley, 1856) — Haas, 1969 + Nodularia (s.s.) dimota (Lea, 1870) — Simpson, 1914 + Contradens dimotus dimotus (Lea, 1870) — Haas, 1913 = Unio sumatrensis Lea — Bullen, 1906 + Nodularia (s.s.) dimota (Lea, 1870) — Simpson, 1900 = Unio sumatrensis Lea — Crosse & Fischer, 1876 + Margaron (Unio) dimotus (Lea) — Lea, 1870 = Unio sumatrensis Lea, 1859 — Reeve, 1865
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