Unio micropterus Morelet, 1866
Morelet, 1866, J. de Conch. 14: 63.
Morelet, 1875, Séries Conch. 4: 349, pl. 15, fig. 6 [7].
Type(s): HOLOTYPE BMNH_93-2-4-1596, Cambodia.

Unio micropterus — Morelet (1866), Morelet (1875), Crosse & Fischer (1876), Morlet (1889), Fischer (1891), Morlet (1891)
Physunio (s.s.) micropterus — Simpson (1900), Preston (1912), Simpson (1914), Haas (1919), Haas (1924), Haas (1969)
Physunio micropterus — Brandt (1974), Graf & Cummings (2007), Bogan (2010), IUCN (2012), Do et al. (2018), Zieritz et al. (2018), Konopleva et al. (2019), Ng et al. (2020), Graf & Cummings (2021)
Uniandra contradens — Bogan & Do (2014)
Lens micropterus — Pfeiffer et al. (2021), Bolotov et al. (2022)

Unio crossei Deshayes & Jullien, 1876
Deshayes in Deshayes & Jullien, 1876, Nouv. Arch. Mus. Hist. Nat. Paris 10: 124, pl. 6, figs. 5-7.
Type(s): SYNTYPES MNHN-IM-2000-1668, Cambodge.

Unio crossei — Crosse & Fischer (1876), Deshayes & Jullien (1876), Morlet (1889), Fischer (1891)
Physunio (s.s.) crossei — Simpson (1900), Simpson (1914)
Contradens crossei — Haas (1914), Haas (1969), Jeratthitikul et al. (2019), Konopleva et al. (2019), Bolotov et al. (2020), Graf & Cummings (2021)
Uniandra contradens crossei — Brandt (1974)
Contradens contradens — Do et al. (2018)
Lens micropterus — Pfeiffer et al. (2021)

Unio inaequalis Rochebrune, 1882
Rochebrune, 1882, Bull. Soc. Philom. Paris 6: 44 [in ‘inæqualis’].

Unio inaequalis — Rochebrune (1882)
Unio inæqualis — Fischer (1891)
Ensidens (sec. Uniandra) inaequalis — Haas (1913), Thiele (1934)
Nodularia (s.s.) inaequalis — Simpson (1914)
Ensidens (Uniandra) inaequalis — Haas (1969), Haas (1969)
Contradens inaequalis — Graf & Cummings (2007), Zieritz et al. (2018), Konopleva et al. (2019), Graf & Cummings (2021)
Uniandra inaequalis — Bogan (2010)
Lens micropterus — Pfeiffer et al. (2021)

Unio semialatus Deshayes & Jullien, 1876
Deshayes in Deshayes & Jullien, 1876, Nouv. Arch. Mus. Hist. Nat. Paris 10: 123, pl. 6, figs. 1-2.
Type(s): SYNTYPE MNHN-IM-2000-1780, Peam Chelang, Cambodge.

Unio semialatus — Deshayes & Jullien (1876)
Unio micropterus — Crosse & Fischer (1876), Fischer (1891)
Physunio (s.s.) semialatus — Simpson (1900), Simpson (1914), Haas (1919), Haas (1969)
Physunio micropterus — Brandt (1974), IUCN (2012), Graf & Cummings (2021)
Physunio semialatus — Graf & Cummings (2007), Bogan (2010)
Lens micropterus — Pfeiffer et al. (2021)

Unio fischerianus Morlet, 1883
Morlet, 1883, J. de Conch. 31: 109, pl. 4, fig. 6.
Type(s): SYNTYPE MNHN_IM-2000-1697, Cambodge.

Unio fischerianus — Morlet (1883), Morlet (1889), Fischer (1891)
Nodularia (s.s.) fischeriania — Simpson (1900), Simpson (1914)
Contradens dimotus fischerianus — Haas (1913)
Contradens ascia fischerianus — Haas (1924), Haas (1952)
Contradens ascia — Haas (1969)
Uniandra contradens fischeriana — Brandt (1974)
Contradens contradens — Jeratthitikul et al. (2019), Ng et al. (2020)
Lens micropterus — Pfeiffer et al. (2021)

Diplodon ludovicianum Rochebrune, 1882
Rochebrune, 1882, Bull. Soc. Philom. Paris 6: 43.
Type(s): SYNTYPES MNHN_IM-2000-35806, Cambodge.

Diplodon ludovicianum — Rochebrune (1882)
Unio ludovicianus — Fischer (1891)
Trapezoideus ludovicianus — Simpson (1914), Haas (1919), Haas (1969)
Trapezoideus exolescens comptus — Brandt (1974)
Trapezoideus exolescens — He & Zhuang (2013)
Contradens comptus — Konopleva et al. (2019)
Lens micropterus — Pfeiffer et al. (2021)

Unio inornatus Reeve, 1865
‘Lea’ Reeve, 1865, Conch. Icon. 16: pl. 29, sp. 147; errata.
(misidentified reference to Unio inornatus Lea, 1856)

Unio inornatus — Reeve (1865), Morelet (1875), Morlet (1889)
Margaron (Unio) versus — Lea (1870)
Unio versus — Fischer (1891)
Nodularia (s.s.) asperula — Simpson (1900), Simpson (1914)
Ensidens (Uniandra) asperulus — Haas (1969)
Uniandra contradens tumidula — Brandt (1974)
Lens micropterus — Pfeiffer et al. (2021)

Unio cambojensis Sowerby, 1866
Sowerby, 1866, Conch. Icon. 16: pl. 42, sp. 231.
Type(s): LECTOTYPE BMNH_1965148, Camboja.

Unio cambojensis — Sowerby (1866)
Unio rusticus — Fischer (1891)
Nodularia (s.s.) rustica — Simpson (1900)
Contradens rusticus — Haas (1914)
Nodularia (s.s.) rusticus — Simpson (1914)
Contradens cambojensis — Ortmann (1917)
Uniandra contradens rustica — Brandt (1974)
Lens micropterus — Pfeiffer et al. (2021)

Margaron (Unio) versus Lea, 1870
‘Lea’ Reeve, 1865, Conch. Icon. 16: pl. 29, sp. 147 [as ‘Unio inornatus’].
Lea, 1870, Synopsis Fam. Naiades: 46.

Margaron (Unio) versus — Lea (1870)
Unio versus — Fischer (1891)
Nodularia (s.s.) asperula — Simpson (1900), Simpson (1914)
Uniandra contradens tumidula — Brandt (1974)
Lens micropterus — Pfeiffer et al. (2021)

Unio siamensis Morlet, 1889
Morlet, 1889, J. de Conch. 37: 164, 194, pl. 7, fig. 2.
Morlet, 1904, Mission Pavie 3: 381, pl. 2, fig. 8.
(homonym of Unio siamensis Lea, 1866; renamed Unio soboles Fischer, 1891)

Unio siamensis — Morlet (1889)
Unio soboles — Fischer (1891)
Nodularia (s.s.) sobolus — Simpson (1900)
Contradens rusticus — Haas (1914), Haas (1969)
Nodularia (s.s.) soboles — Simpson (1914)
Uniandra contradens rustica — Brandt (1974)
Lens micropterus — Pfeiffer et al. (2021)

Unio micropterus Fischer, 1891
‘Morelet’ of Authors.
Fischer, 1891, Bull. Soc. Hist. Nat. Autun 4: 226.
Fischer & Dautzenberg, 1904, Mission Pavie 3: 439.
(reference to Unio micropterus Morelet, 1866)

Unio micropterus — Fischer (1891)
Physunio (s.s.) semialatus — Haas (1919)

Unio soboles Fischer, 1891
Fischer, 1891, Bull. Soc. Hist. Nat. Autun 4: 227.
(new name for Unio siamensis Morlet, 1889)

Unio soboles — Fischer (1891)
Nodularia (s.s.) sobolus — Simpson (1900)
Contradens rusticus — Haas (1914), Haas (1969)
Nodularia (s.s.) soboles — Simpson (1914)
Uniandra contradens rustica — Brandt (1974)
Lens micropterus — Pfeiffer et al. (2021)

Nodularia sobolus Simpson, 1900
‘Fischer’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 819.
(error for Unio soboles Fischer, 1891)

Nodularia sobolus — Simpson (1900)
Contradens rusticus — Haas (1914), Haas (1969)
Nodularia (s.s.) soboles — Simpson (1914)

Nodularia (s.s.) fischeriania Simpson, 1900
‘Morlet’ Simpson, 1900, Proc. U.S. Nat. Mus. 22: 818.
‘Morlet’ Simpson, 1914, Descr. Cat. Naiades: 1009.
(error for Unio fischerianus Morlet, 1883)

Nodularia (s.s.) fischeriania — Simpson (1900)

Contradens contradens Pfeiffer & Graf, 2015
‘Lea’ of Authors.
Pfeiffer & Graf, 2015, Zool. J. Linn. Soc. 175(2): 310.
Bolotov et al., 2017, Sci. Repts. 7: Table S1 [as ‘Contradens aff. contradens sp. 1’].
Konopleva et al., 2017, Systemat. Biodiv. 15(3): 207.
Bolotov et al., 2017, Sci. Repts. 7: Table S1 [as ‘Contradens aff. contradens sp. 1’].
Bolotov et al., 2018, Sci. Repts. 8: Table S1 [as ‘Contradens aff. contradens sp. 1’].
Konopleva et al., 2019, Ecologica Montenegrina 24: Appendix 1 [as ‘Contradens aff. contradens sp. 1’].
Konopleva et al., 2019, Sci. Repts. 9: Table S1 [as ‘Contradens aff. contradens sp. 1’].
Huang et al., 2019, MPE 130: Table S4 [as ‘Contradens aff. contradens sp. 1’].
Bolotov et al., 2020, Sci. Repts. 10: Table S1 [as ‘Contradens aff. contradens sp. 1’].
Konopleva et al., 2023, Diversity 15(1), 10: Table S2 [as ‘Lens aff. contradens’].
(misidentified reference to Unio contradens Lea, 1838)

Contradens contradens — Pfeiffer & Graf (2015)
Lens micropterus — Pfeiffer et al. (2021)

Taxonomic History (since 1900)

Nodularia (s.s.) asperula — Simpson (1900), Simpson (1914)
Nodularia (s.s.) rustica — Simpson (1900)
Physunio (s.s.) micropterus — Simpson (1900), Preston (1912), Simpson (1914), Haas (1919), Haas (1924), Haas (1969)
Physunio (s.s.) crossei — Simpson (1900), Simpson (1914)
Physunio (s.s.) semialatus — Simpson (1900), Simpson (1914), Haas (1919), Haas (1969)
Nodularia (s.s.) fischeriania — Simpson (1900), Simpson (1914)
Nodularia (s.s.) sobolus — Simpson (1900)
Nodularia sobolus — Simpson (1900)
Ensidens (sec. Uniandra) inaequalis — Haas (1913), Thiele (1934)
Contradens dimotus fischerianus — Haas (1913)
Contradens rusticus — Haas (1914), Haas (1969)
Nodularia (s.s.) rusticus — Simpson (1914)
Contradens crossei — Haas (1914), Haas (1969), Jeratthitikul et al. (2019), Konopleva et al. (2019), Bolotov et al. (2020), Graf & Cummings (2021)
Trapezoideus ludovicianus — Simpson (1914), Haas (1919), Haas (1969)
Nodularia (s.s.) inaequalis — Simpson (1914)
Nodularia (s.s.) soboles — Simpson (1914)
Contradens cambojensis — Ortmann (1917)
Contradens ascia fischerianus — Haas (1924), Haas (1952)
Ensidens (Uniandra) asperulus — Haas (1969)
Ensidens (Uniandra) inaequalis — Haas (1969), Haas (1969)
Contradens ascia — Haas (1969)
Uniandra contradens tumidula — Brandt (1974)
Uniandra contradens rustica — Brandt (1974)
Physunio micropterus — Brandt (1974), Graf & Cummings (2007), Bogan (2010), IUCN (2012), Do et al. (2018), Zieritz et al. (2018), Konopleva et al. (2019), Ng et al. (2020), Graf & Cummings (2021)
Uniandra contradens crossei — Brandt (1974)
Trapezoideus exolescens comptus — Brandt (1974)
Uniandra contradens fischeriana — Brandt (1974)
Physunio semialatus — Graf & Cummings (2007), Bogan (2010)
Contradens inaequalis — Graf & Cummings (2007), Zieritz et al. (2018), Konopleva et al. (2019), Graf & Cummings (2021)
Uniandra inaequalis — Bogan (2010)
Trapezoideus exolescens — He & Zhuang (2013)
Uniandra contradens — Bogan & Do (2014)
Contradens contradens — Pfeiffer & Graf (2015), Do et al. (2018), Jeratthitikul et al. (2019), Ng et al. (2020)
Contradens comptus — Konopleva et al. (2019)
Lens micropterus — Pfeiffer et al. (2021), Bolotov et al. (2022)