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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 | Unionoida | Unionoidea | Unionidae | Gonideinae | Contradentini genus Lens Simpson, 1900: synonymy
13 Recent valid species (13 total species) Lens Simpson, 1900
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 831.
Simpson, 1914. Descr. Cat. Naiades: 1067.
(intro'd as sub-gen. of Physunio Simpson, 1900)
Type species: Unio eximius Lea, 1856 (orig. desig.) = Lens eximius Contradens Haas, 1911
Haas, 1911. Conch. Cab. 9 (pt. 2, h. 44): pl. 18-22.
Haas, 1913. Nachr. Bl. Dtsch. Malak. Ges. 45: 35.
Haas, 1913. Conch. Cab. 9 (pt. 2, h. 48): 173.
Type species: Unio contradens Lea, 1838 (orig. desig.) = Lens contradens Uniandra Haas, 1913
Haas, 1913. Conch. Cab. 9 (pt. 2, h. 47): 140.
(intro'd as sub-gen. of Ensidens Frierson, 1911)
Type species: Unio inaequalis Rochebrune, 1882 (orig. desig.) = Lens micropterus Schizocleithrum Haas, 1913
Haas, 1911. Conch. Cab. 9 (pt. 2, h. 44): pl. 22.
Haas, 1913. Nachr. Bl. Dtsch. Malak. Ges. 45: 36.
Haas, 1914. Conch. Cab. 9 (pt. 2, h. 49): 202.
Type species: Unio pajakomboensis Bullen, 1906 (orig. desig.) = Lens contradens Sprickia Modell, 1942
Modell, 1942. Arch. Moll. 74(5/6): 189.
Modell, 1964. Arch. Moll. 93: 114.
(intro'd as sub-gen. of Contradens Haas, 1911)
Type species: Unio verbecki Martens, 1897 (orig. desig.) = Lens contradens Sprichia Vokes, 1980
‘Modell’ of Authors.
Vokes, 1980. Genera of the Bivalvia: 78.
Vaught, 1989. Class. Livinh Moll.: 122.
Millard, 2001. Class. Moll. (3): 1064.
(error for Sprickia Modell, 1942) Contortus Araujo et al., 2017
Araujo et al., 2017. Zool. J. Linn. Soc. 179(2): 280.
(error for Contradens Haas, 1911) Taxonomic History (since 1900)Nodularia (s.s.) — Simpson (1900), Simpson (1914)
Physunio (s.s.) — Simpson (1900), Preston (1912), Simpson (1914), Haas (1919), Haas (1924), Haas (1952), Haas (1969)
Physunio (sec. Lens) — Simpson (1900)
Dalliella — Simpson (1900)
Trapezoideus — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915), Haas (1919), ... IUCN (2012), He & Zhuang (2013), Zieritz et al. (2018), Do et al. (2018), Pfeiffer et al. (2018)
Unio — Martens (1900), Bullen (1906), Preston (1912), Simpson (1914)
Unio (Nodularia) — Dautzenberg & Fischer (1905)
Ensidens (sec. Uniandra) — Haas (1913), Thiele (1934)
Ensidens (s.s.) — Haas (1913), Haas (1969)
Contradens — Haas (1913), Haas (1914), Ortmann (1917), Haas (1924), Thiele (1934), ... Ng et al. (2020), Graf & Cummings (2021), Bieler (2021), Smith (2021), Sahidin et al. (2021)
Physunio (Lens) — Simpson (1914), Haas (1969)
Pseudodon (sec. Bineurus) — Simpson (1914)
Hyriopsis (s.s.) — Simpson (1914)
Schizocleithrum — Haas (1914)
Pseudodon (Bineurus) — Haas (1920), Haas (1969)
Ensidens (Uniandra) — Prashad (1932), Haas (1952), Haas (1969), Haas (1969)
Contradens (s.s.) — Modell (1942), Haas (1969)
Contradens (Sprickia) — Modell (1942), Haas (1969)
Physunio — van Benthem Jutting (1953), Brandt (1974), Graf & Cummings (2007), Sri-aroon et al. (2007), Bogan (2010), ... Konopleva et al. (2019), Ng et al. (2020), Graf & Cummings (2021), Wu et al. (2021), Sahidin et al. (2021)
Ensidens — F.R. Woodward (1969)
Harmandia — Brandt (1974), Graf & Cummings (2007), Bogan (2010), IUCN (2012), Zieritz et al. (2018)
Uniandra — Brandt (1974), Graf (2002), Sri-aroon et al. (2007), Hoeh et al. (2009), Bogan (2010), IUCN (2012), Bogan & Do (2014), Zieritz et al. (2015), Sahidin et al. (2021)
Contortus [sic] — Araujo et al. (2017)
Lens — Pfeiffer et al. (2021), Jeratthitikul et al. (2021), Zieritz et al. (2021), Jeratthitikul et al. (2021), Zieritz et al. (2021), ... Dai et al. (2024), Zhang et al. (2024), Dai et al. (2025), Dai et al. (2025), Chen et al. (2025)
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