Unio nana Lamarck, 1819
Lamarck, 1819, Hist. Natur. Anim. sans Vert. 6: 76, sp. 27.

Unio nana — Lamarck (1819), Westerlund (1890), Kobelt & Haas (1910)
Unio littoralis — Lea (1834), Hanley (1843)
Margarita (Unio) litoralis — Lea (1836), Lea (1838)
Margaron (Unio) litoralis — Lea (1852), Lea (1870)
Unio (Batavi) nanus — Dupuy (1852)
Unio (Lymnium) batavus var. L nanus — Moquin-Tandon (1855)
Unio batavus var. nanus — de Joannis (1859)
Unio litoralis — Reeve (1865)
Unio nanus — Kobelt (1879), Lopes-Lima et al. (2024)
Unio (Groupe de l’U. mancus) nanus — Locard (1882)
Unio (Nanusiana) nanus — Locard (1889)
Unio (sec. Hyridella) batavus vr. nanus — Paetel (1890)
Unio (Groupe de l’U. nanus) nanus — Locard (1893)
Unio (groupe de l’U. nanus) nanus — Dumas (1895)
Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio (Rhomboïdiana) nana — Germain (1904)
Unio (Groupe des Ninusiana) nanus — Caziot (1907)
Unio mancus var. nanus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Batavusiana (s.s.) nana — Zatravkin (1983), Zatravkin (1987)
Unio (Crassiana) crassus nanus — Falkner et al. (2001), Falkner et al. (2002)
Crassiana (Bataviana) nana — Starobogatov et al. (2004)
Crassiana nana nana — Kantor & Sysoev (2005), Kantor et al. (2010)
Unio crassus — Graf (2007), Anisimova et al. (2018), Bogatov et al. (2018)
Unio crassus nanus — Prié & Puillandre (2014)
Unio (Crassiana) nana — Vinarski & Kantor (2016)
Unio crassus crassus — Klishko et al. (2017)
Unio crassus nana — Bogatov (2022)

Unio cytherea Küster, 1833
Küster, 1833, Icones Moll. Test. Abthl. 2: pl. 5, fig. 3.

Unio cytherea — Küster (1833)
Unio (Mysca) conus — Mörch (1863)
Unio cytherea cytherea — Haas (1913)
Unio crassus cytherea — Haas (1940), Haas (1969), Fauna Europaea (2012), Prié & Puillandre (2014), Lopes-Lima et al. (2017)
Unio (Crassiana) crassus cytherea — Falkner et al. (2001), Falkner et al. (2002)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio crassus — Araujo et al. (2018)
Unio nanus — Lopes-Lima et al. (2024)

Unio fusculus Rossmässler, 1836
‘Z.’ Rossmässler, 1835, Icon. Land- und Süssw.-Moll. 1 (2): 21.
‘Ziegler’ Rossmässler, 1836, Icon. Land- und Süssw.-Moll. 1 (3): 30, pl. 15, fig. 211.

Unio fusculus — Rossmässler (1836), Zelebor (1851)
Unio batavus — Rossmässler (1835), Westerlund (1890)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Mysca batava var. fuscula — Schlüter (1838)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Lymnium) batavus var. E riparius — Moquin-Tandon (1855)
Unio batavus var. crassus — Clessin (1877)
Unio (Groupe de l’U. fusculus) fusculus — Locard (1882), Locard (1893)
Unio (Fusculusiana) fusculus — Locard (1889), Germain (1904)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus var. piscinalis — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Batavusiana (s.s.) fuscula — Zatravkin (1983), Zatravkin (1987)
Batavusiana (s.s.) fuscula fuscula — Stadnichenko (1984)
Crassiana (Bataviana) fuscula — Starobogatov et al. (2004)
Crassiana fuscula — Kantor & Sysoev (2005), Kantor et al. (2010)
Unio crassus — Graf (2007)
Unio (Crassiana) fusculus — Vinarski & Kantor (2016)
Unio crassus crassus — Klishko et al. (2017)
Unio crassus musivus — Bogatov (2022)
Unio nanus — Lopes-Lima et al. (2024)

Unio riparia Pfeiffer, 1821
Bruguière, 1797, Encycl. Méth. 2: pl. 249, fig. 4a-b [as Unio sp.].
Pfeiffer, 1821, Natur. Deutsch. Land Sussw. Moll. 1: 118, pl. 5, fig. 13.
Scholtz, 1843, Land- und Wassermoll. Schlesiens: 129. [nomen nudum]

Unio riparia — Pfeiffer (1821), Krynicki (1837)
Unio riparius — Menke (1828), Menke (1830), Servain (1885), Westerlund (1890)
Unio batavus — Rossmässler (1835)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Lymnium) batavus var. E riparius — Moquin-Tandon (1855)
Unio (Groupe de l’U. fusculus) riparius — Locard (1882)
Unio (Amniciana) riparius — Servain (1888)
Unio (Amnicusiana) riparius — Locard (1889)
Unio (sec. Hyridella) batavus vr. riparius — Paetel (1890)
Unio (Groupe de l’U. amnicus) riparius — Locard (1893)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio (Socardiana) riparius — Germain (1904)
Unio mancus var. amnicus form riparius — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio (Crassiana) crassus riparius — Falkner et al. (2001), Falkner et al. (2002)
Unio crassus crassus — Lopes-Lima et al. (2017)
Unio nanus — Lopes-Lima et al. (2024)

Unio decurvatus Rossmässler, 1835
Rossmässler, 1835, Icon. Land- und Süssw.-Moll. 1 (2): 22, pl. 9, fig. 131.
Rossmässler, 1837, Icon. Land- und Süssw.-Moll. 1 (5-6): 21, pl. 24, fig. 339.

Unio decurvatus — Rossmässler (1835), Rossmässler (1837), J.F. Schmidt (1840), C.B. Adams (1847), Küster (1854), Sowerby (1867), Westerlund (1890)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Mysca decurvata — Schlüter (1838)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Sandriana) decurvatus — Locard (1889)
Unio (s.s.) decurvatus — Paetel (1890)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus cytherea — Haas (1940), Haas (1969), Fauna Europaea (2012), Lopes-Lima et al. (2017)
Unio (Crassiana) crassus decurvatus — Falkner et al. (2001)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus var. albensis Hazay, 1885
Hazay, 1885, Jb. Dtsch. Malak. Ges. 12: 43.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus var. albensis — Hazay (1885), Westerlund (1890)
Unio albensis — Kobelt (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio (Crassiana) crassus albensis — Falkner et al. (2001)
Unio crassus batavus — Lopes-Lima et al. (2017)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus var. ondovensis Hazay, 1885
Hazay, 1885, Jb. Dtsch. Malak. Ges. 12: 43.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus var. ondovensis — Hazay (1885), Westerlund (1890)
Unio ondovensis — Kobelt (1890)
Unio crassus cytherea — Haas (1940), Haas (1969), Lopes-Lima et al. (2017)
Unio (Crassiana) crassus ondovensis — Falkner et al. (2001)
Unio nanus — Lopes-Lima et al. (2024)

Mya ovata Coxe, 1789
Studer in Coxe, 1789, unknown publication: 392. [nomen nudum]

Mya ovata — Coxe (1789)
Unio nanus — Lopes-Lima et al. (2024)

Mya pictorum Coxe, 1789
Coxe, 1789, unknown publication: 392. [nomen nudum]
(misidentified reference to Mya pictorum Linnaeus, 1758)

Mya pictorum — Coxe (1789)
Unio nanus — Lopes-Lima et al. (2024)

Unio dilatatus Studer, 1820
Bruguière, 1797, Encycl. Méth. 2: pl. 249, fig. 4a-b [as Unio sp.].
Studer, 1820, System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.

Unio dilatatus — Studer (1820)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Lymnium) batavus — Moquin-Tandon (1855)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio inflatus Studer, 1820
Draparnaud, 1806, Hist. Moll. France: pl. 11, figs. 2. [in part]
Studer, 1820, System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.
(misidentified reference to Unio pictorum Draparnaud, 1806)

Unio inflatus — Studer (1820)
Unio limosus — Charpentier (1837)
Margaron (Unio) pictorum — Lea (1870)
Unio pictorum — He & Zhuang (2013)
Unio (s.s.) pictorum — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio ovatus Studer, 1820
Schröter, 1779, Gesch. Flußconch.: pl. 3, figs. 2.
Studer, 1820, System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.
(homonym of Unio ovatus Say, 1817)

Unio ovatus — Studer (1820), Servain (1885), Westerlund (1890)
Unio batavus var. ovatus — Charpentier (1837)
Margaron (Unio) tumidus — Lea (1852), Lea (1870)
Unio (Lymnium) batavus var. C ovatus — Moquin-Tandon (1855)
Unio (Lymnium) batavus — Drouët (1857)
Unio (Fusculusiana) ovatus — Locard (1889)
Unio (Groupe de l’U. fusculus) ovatus — Locard (1893)
Unio consentaneus ovatus — Kobelt & Haas (1910)
Unio crassus var. piscinalis — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio planus Studer, 1820
Studer, 1820, System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.

Unio planus — Studer (1820)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Unio limosus — Charpentier (1837)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio rostratus Studer, 1820
Studer, 1820, System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.
(homonym of Unio rostrata Lamarck, 1819)

Unio rostratus — Studer (1820)
Margarita (Unio) ovalis — Lea (1836)
Unio tumidus — Charpentier (1837), Reeve (1865)
Margaron (Unio) tumidus — Lea (1852), Lea (1870)
Unio (Lymnium) tumidus — Moquin-Tandon (1855)
Unio nanus — Lopes-Lima et al. (2024)

Unio sinuatus Studer, 1820
Schröter, 1779, Gesch. Flußconch.: 182, pl. 2, fig. 2 [Mya testa crassa]. [non-binomial]
Studer, 1820, System. Verzeich. bekannt geword. Schweizer-Conchylien: 30.
(homonym of Unio sinuata Lamarck, 1819)

Unio sinuatus — Studer (1820)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Unio batavus var. sinuatus — Charpentier (1837)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Lymnium) batavus var. M sinuatus — Moquin-Tandon (1855)
Margaron (Margaritana) margaritifera — Lea (1870)
Unio (Batavusiana) financei — Locard (1889)
Unio squamosus — Drouët (1889)
Unio batavus — Germain (1931)
Unio crassus cytherea — Haas (1940)
Unio nanus — Lopes-Lima et al. (2024)

Unio castaneus Fitzinger, 1833
Fitzinger, 1833, Syst, Verz. Österr. Weichth.: 119.
(homonym of Unio castaneus Lea, 1831)

Unio castaneus — Fitzinger (1833)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio dubius Fitzinger, 1833
Fitzinger, 1833, Syst, Verz. Österr. Weichth.: 119. [nomen nudum]

Unio dubius — Fitzinger (1833), Zelebor (1851)
Unio (Lymnium) ater — Drouët (1857)
Margaron (Unio) pictorum — Lea (1870)
Unio (sec. Lymnium) pictorum — Simpson (1900), Simpson (1914)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio nigricans Fitzinger, 1833
Fitzinger, 1833, Syst, Verz. Österr. Weichth.: 119. [nomen nudum]

Unio nigricans — Fitzinger (1833), Zelebor (1851)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio sinuolata Küster, 1833
Küster, 1833, Icones Moll. Test. Abthl. 2: pl. 5, fig. 5.

Unio sinuolata — Küster (1833)
Unio cytherea cytherea — Haas (1913)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio labacensis Rossmässler, 1835
‘Ziegler’ Rossmässler, 1835, Icon. Land- und Süssw.-Moll. 1 (2): 21.
(intro'd as syn of Mya batava Maton & Rackett, 1807)

Unio labacensis — Rossmässler (1835), J.F. Schmidt (1840)
Unio batavus — Rossmässler (1835), Küster (1855), Westerlund (1890)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Mysca batava var. labacensis — Schlüter (1838)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio batavus var. crassus — Clessin (1877)
Unio amnicus — Drouët (1889)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio vitreus Rossmässler, 1835
‘Stenz’ Rossmässler, 1835, Icon. Land- und Süssw.-Moll. 1 (2): 21.
(intro'd as syn of Mya batava Maton & Rackett, 1807)

Unio vitreus — Rossmässler (1835)
Margaron (Unio) batavus — Lea (1870)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio amnicus Rossmässler, 1836
Rossmässler, 1835, Icon. Land- und Süssw.-Moll. 1 (2): 20.
‘Ziegl.’ Rossmässler, 1836, Icon. Land- und Süssw.-Moll. 1 (3): 31, pl. 15, fig. 212.

Unio amnicus — Rossmässler (1836), J.F. Schmidt (1840), C.B. Adams (1847), Küster (1854), Servain (1885), Drouët (1889), Westerlund (1890)
Unio batavus — Rossmässler (1835)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Mysca amnica — Schlüter (1838)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Batavi) nanus — Dupuy (1852)
Unio (Lymnium) batavus var. L nanus — Moquin-Tandon (1855)
Unio batavus var. crassus — Clessin (1877)
Unio (Groupe de l’U. fusculus) amnicus — Locard (1882)
Unio (Amniciana) amnicus — Servain (1888)
Unio (Amnicusiana) amnicus — Locard (1889)
Unio (sec. Hyridella) batavus vr. amnicus — Paetel (1890)
Unio (Groupe de l’U. amnicus) amnicus — Locard (1893)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio (Groupe des Amnicusiana) amnicus — Caziot (1907)
Unio consentaneus minor — Kobelt & Haas (1910)
Unio mancus var. amnicus — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio atrovirens Rossmässler, 1836
‘Schmidt’ Rossmässler, 1836, Icon. Land- und Süssw.-Moll. 1 (3): 28, pl. 15, figs. 206-207.

Unio atrovirens — Rossmässler (1836), J.F. Schmidt (1840)
Mysca decurvata subvar. atrovirens — Schlüter (1838)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio decurvatus — Küster (1854)
Unio batavus var. ater — Clessin (1877)
Unio (s.s.) decurvatus vr. atrovirens — Paetel (1890)
Unio decurvatus var. atrovirens — Westerlund (1890)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio carinthiacus Rossmässler, 1836
‘Z.’ Rossmässler, 1835, Icon. Land- und Süssw.-Moll. 1 (2): 21.
‘Ziegl.’ Rossmässler, 1836, Icon. Land- und Süssw.-Moll. 1 (3): 30, pl. 15, fig. 209.
Type(s): PARATYPE BMNH_1965216, Carinthia.

Unio carinthiacus — Rossmässler (1836), Reeve (1865)
Unio batavus — Rossmässler (1835), Küster (1855), Westerlund (1890), Germain (1931)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Mysca batava var. carynthiaca — Schlüter (1838)
Unio carynthiacus — J.F. Schmidt (1840), C.B. Adams (1847), Schröder (1885)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio batavus var. crassus — Clessin (1877)
Unio (Bataviana) carynthiacus — Servain (1888)
Unio (Batavusiana) carynthiacus — Locard (1889), Germain (1904)
Unio (Groupe de l’U. batavus) carinthiacus — Locard (1893)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus Rossmässler, 1836
‘Ziegl.’ Rossmässler, 1836, Icon. Land- und Süssw.-Moll. 1 (3): 29, pl. 15, fig. 208.
‘Ziegl.’ Rossmässler, 1838, Icon. Land- und Süssw.-Moll. 2 (1-2): 42, pl. 40, fig. 544.
Rossmässler, 1842, Icon. Land- und Süssw.-Moll. 2 (5): 14, pl. 55, fig. 742.

Unio consentaneus — Rossmässler (1836), Rossmässler (1838), J.F. Schmidt (1840), Rossmässler (1842), Zelebor (1851), Kobelt (1910), Germain (1931)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Potamida) crassus — Mörch (1853)
Unio ater — Küster (1854), Westerlund (1890)
Unio (Lymnium) ater — Moquin-Tandon (1855), Drouët (1857)
Unio batavus var. ater — Clessin (1877)
Unio ater vr. consentaneus — Paetel (1890)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio consentaneus var. — Kobelt & Haas (1910)
Unio crassus consentaneus — Ortmann (1912)
Unio cytherea cytherea — Haas (1913)
Unio (s.s.) crassus consentancus — Zhadin (1938)
Unio crassus cytherea — Haas (1940), Haas (1969)
Batavusiana (s.s.) nana — Zatravkin (1987)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio piscinalis Rossmässler, 1836
‘Z.’ Rossmässler, 1835, Icon. Land- und Süssw.-Moll. 1 (2): 21.
‘Ziegl.’ Rossmässler, 1836, Icon. Land- und Süssw.-Moll. 1 (3): 30, pl. 15, fig. 210.

Unio piscinalis — Rossmässler (1836)
Unio batavus — Rossmässler (1835)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio batavus var. crassus — Clessin (1877)
Unio (Groupe de l’U. fusculus) piscinalis — Locard (1882), Locard (1893)
Unio (Fusculusiana) piscinalis — Locard (1889)
Unio batavus var. piscinalis — Westerlund (1890)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus var. piscinalis — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio reniformis Rossmässler, 1836
‘Schmidt’ Rossmässler, 1836, Icon. Land- und Süssw.-Moll. 1 (3): 31, pl. 15, fig. 213.

Unio reniformis — Rossmässler (1836), J.F. Schmidt (1840), Küster (1854), Sowerby (1868), Westerlund (1890)
Margarita (Unio) batava — Lea (1836), Lea (1838)
Mysca reniformis — Schlüter (1838)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Potamida) reniformis — Mörch (1853)
Unio (Lymnium) batavus var. N reniformis — Moquin-Tandon (1855)
Unio batavus var. ater — Clessin (1877)
Unio (Groupe de l’U. fusculus) reniformis — Locard (1882), Locard (1893)
Unio (Fusculusiana) reniformis — Locard (1889)
Unio ater vr. reniformis — Paetel (1890)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus var. piscinalis — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio retusa Held, 1836
Held, 1836, Isis (Oken) 1836: 281.
(homonym of Unio retusa Lamarck, 1819)

Unio retusa — Held (1836)
Margaron (Unio) pictorum — Lea (1852), Lea (1870)
Unio pictorum — Drouët (1889)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus var. elongatus Held, 1837
Held, 1837, Isis (Oken) 1837 (4): 306.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807; homonym of Unio elongata Lamarck, 1819)

Unio batavus var. elongatus — Held (1837)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus var. gibbosus Held, 1837
Held, 1837, Isis (Oken) 1837 (4): 306.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807; homonym of Unio gibbosus Barnes, 1823)

Unio batavus var. gibbosus — Held (1837)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus var. squamosus Charpentier, 1837
Charpentier, 1837, Cat. Moll. Suisse: 25, pl. 2, fig. 22.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus var. squamosus — Charpentier (1837)
Unio (Lymnium) batavus var. H squamosus — Moquin-Tandon (1855)
Unio squamosus — Drouët (1881), Drouët (1889), Westerlund (1890)
Unio (sec. Hyridella) batavus vr. squamosus — Paetel (1890)
Unio consentaneus squamosus — Kobelt (1910), Kobelt & Haas (1910)
Unio consentaneus — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus legitimus Rossmässler, 1838
Rossmässler, 1838, Icon. Land- und Süssw.-Moll. 2 (1-2): 25, pl. 35, fig. 491a. [infra-subsp.]
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus legitimus — Rossmässler (1838)
Unio consentaneus form legitimus — Rossmässler (1838)
Unio crassus cytherea — Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus minor Rossmässler, 1838
Rossmässler, 1838, Icon. Land- und Süssw.-Moll. 2 (1-2): 25, pl. 35, fig. 491c. [infra-subsp.]
(homonym of Unio margaritifer var. minor Rossmässler, 1835; intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus minor — Rossmässler (1838), Kobelt & Haas (1910)
Unio consentaneus form minor — Rossmässler (1838)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus pulcher Rossmässler, 1838
Rossmässler, 1838, Icon. Land- und Süssw.-Moll. 2 (1-2): 25, pl. 35, fig. 491b. [infra-subsp.]
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836; homonym of Unio pulcher Lea, 1838)

Unio consentaneus pulcher — Rossmässler (1838)
Unio consentaneus form pulcher — Rossmässler (1838)
Unio nanus — Lopes-Lima et al. (2024)

Unio pruinosus J.F. Schmidt, 1840
J.F. Schmidt, 1840, Bull. Soc. imp. Nat. Moscou 13: 445, pl. 9, fig. 3.

Unio pruinosus — J.F. Schmidt (1840), Drouët (1881), Drouët (1889), Westerlund (1890)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio (Groupe de l’U. fusculus) fusculus — Locard (1882)
Unio (Fusculusiana) pruinosus — Locard (1889)
Unio (Groupe de l’U. fusculus) pruinosus — Locard (1893)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus var. piscinalis — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio heldii Küster, 1854
Küster, 1854, Conchyl. Cab. 9(2): 111, pl. 30, fig. 5-7.

Unio heldii — Küster (1854), Drouët (1881), Drouët (1881), Westerlund (1890), Kobelt & Haas (1910)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio nessorhynchus Küster, 1854
Küster, 1854, Conchyl. Cab. 9(2): 116, pl. 31, fig. 6.

Unio nessorhynchus — Küster (1854)
Margaron (Unio) batavus — Lea (1852), Lea (1870)
Unio ater — Küster (1854)
Unio ater var. nessorhynchus — Westerlund (1890)
Unio cytherea nessorhynchus — Haas (1913)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio bosnensis Möllendorff, 1874
Möllendorff, 1874, Beitr. Fauna Bosniens: 62, text figs. 21-22.
(renamed Unio bosnicus Locard, 1889)

Unio bosnensis — Möllendorff (1874), Kobelt (1879)
Unio (Fusculusiana) bosnicus — Locard (1889)
Unio (sec. Hyridella) bosnensis — Paetel (1890)
Unio bosnicus — Westerlund (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio phaseolus Kobelt, 1879
‘Held’ Kobelt, 1879, Icon. Land- und Süssw.-Moll. 6: 44, pl. 163, fig. 1649.
(homonym of Unio phaseolus Hildreth, 1828)

Unio phaseolus — Kobelt (1879)
Unio heldii — Küster (1854), Drouët (1881), Westerlund (1890), Kobelt & Haas (1910)
Unio batavus var. crassus — Clessin (1877)
Unio (sec. Hyridella) batavus vr. phaseolus — Paetel (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio croaticus Drouët, 1881
Drouët, 1881, J. de Conch. 29: 245.

Unio croaticus — Drouët (1881), Kobelt (1886), Westerlund (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio neocomensis Drouët, 1881
Drouët, 1881, J. de Conch. 29: 247.

Unio neocomensis — Drouët (1881), Westerlund (1890)
Unio neocomiensis — Kobelt (1886)
Unio (Sandriana) necomensis — Locard (1889)
Unio (Groupe de l’U. macrorhynchus) necomensis — Locard (1893)
Unio mancus var. macrorhynchus — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio danemorae Locard, 1882
Bourguignat in Locard, 1882, Prodr. Malac. Franç. 1: 284, 354 [as ‘danemoræ’].
‘Mörch’ Locard, 1889, Contr. Faune Malacol. Franc. 13: 147 [41] [as ‘danemoræ’].
‘Mörch’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 177 [as ‘danemoræ’].
Type(s): IDIOTYPE MNHN_22186, lac d’Ondres (Basses-Pyrénées).

Unio danemorae — Locard (1882)
Unio (Groupe de l’U. ater) danemoræ — Locard (1882), Locard (1893)
Unio (Ateriana) danemoræ — Locard (1889)
Unio consentaneus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio dubisianus Locard, 1882
‘Coutagne’ Locard, 1882, Prodr. Malac. Franç. 1: 291 [as ‘dubisanus’], 360.
‘Coutagne’ Locard, 1889, Contr. Faune Malacol. Franc. 13: 129 [23].
‘Coutagne’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 158.
(correct name for Unio dubisanus Locard, 1882)
Type(s): SYNTYPE MNHN_22198, La Clange (Jura).

Unio dubisianus — Locard (1882), Drouët (1889), Westerlund (1890)
Unio (Groupe de l’U. mancus) dubisanus — Locard (1882)
Unio (Mancusiana) dubisianus — Locard (1889)
Unio (Groupe de l’U. mancus) dubisianus — Locard (1893)
Unio (Groupe des Mancusiana) dubisianus — Caziot (1907)
Unio mancus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio mancus mancus — Prie (2012)
Unio nanus — Lopes-Lima et al. (2024)

Unio dubisiopsis Locard, 1882
Locard, 1882, Prodr. Malac. Franç. 1: 291 [as ‘dubisopsis’], 360.
Locard, 1889, Contr. Faune Malacol. Franc. 13: 128 [22] [as ‘dubisianopsis’].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 155 [as ‘dubisianopsis’].
(correct name for Unio dubisianopsis Locard, 1889)

Unio dubisiopsis — Locard (1882)
Unio (Groupe de l’U. mancus) dubisiopsis — Locard (1882)
Unio (Melasiana) dubisianopsis — Locard (1889)
Unio dubisianus var. dubisianopsis — Westerlund (1890)
Unio (Groupe de l’U. melas) dubisianopsis — Locard (1893)
Unio mancus var. amnicus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio macrorhynchus Locard, 1882
Bourguignat in Locard, 1882, Prodr. Malac. Franç. 1: 292, 361.
‘Bourguignat’ Locard, 1889, Contr. Faune Malacol. Franc. 13: 132 [26].
‘Bourguignat’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 158, fig. 172.
Type(s): LECTOTYPE MNHN_22326, lac du Bourget.

Unio macrorhynchus — Locard (1882), Westerlund (1890)
Unio (Groupe de l’U. sandrii) macrorhynchus — Locard (1882)
Unio (Sandriana) macrorhynchus — Locard (1889)
Unio (Groupe de l’U. macrorhynchus) macrorhynchus — Locard (1893)
Unio mancus var. macrorhynchus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio melas Locard, 1882
Coutagne in Locard, 1882, Prodr. Malac. Franç. 1: 285, 355.
‘Coutagne’ Locard, 1889, Contr. Faune Malacol. Franc. 13: 128 [22].
‘Coutagne’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 155, fig. 169.
Type(s): SYNTYPE MNHN_22363, Saulcy-sur-Meurthe (Vosges) [written on shell].

Unio melas — Locard (1882)
Unio (Groupe de l’U. crassus) melas — Locard (1882)
Unio (Melasiana) melas — Locard (1889), Germain (1904)
Unio (Groupe de l’U. melas) melas — Locard (1893)
Unio mancus var. amnicus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio potamius Locard, 1882
Bourguignat in Locard, 1882, Prodr. Malac. Franç. 1: 289, 359.
‘Bourguignat’ Locard, 1889, Contr. Faune Malacol. Franc. 13: 140 [34].
‘Bourguignat’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 169.
Type(s): IDIOTYPE MNHN_22470, La Brizotte (Côte-d’Or).

Unio potamius — Locard (1882), Bourguignat (1883)
Unio (Groupe de l’U. Batavus) potamius — Locard (1882)
Unio (Ellipsopsisiana) potamius — Locard (1889)
Unio batavus var. potamius — Westerlund (1890)
Unio (Groupe de l’U. batavus) potamius — Locard (1893)
Unio (Batavusiana) potamius — Germain (1904)
Unio batavus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio savensis Drouët, 1882
Drouët, 1882, Unionidae de Serbie: 15.

Unio savensis — Drouët (1882), Kobelt (1884), Westerlund (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio socardianus Locard, 1882
Bourguignat in Locard, 1882, Prodr. Malac. Franç. 1: 286, 355.
‘Bourguignat’ Locard, 1889, Contr. Faune Malacol. Franc. 13: 134 [28].
‘Bourguignat’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 161.

Unio socardianus — Locard (1882)
Unio (Crassiana) socardianus — Servain (1882)
Unio (Groupe de l’U. crassus) socardianus — Locard (1882)
Unio (Socardiana) socardianus — Locard (1889)
Unio (Groupe de l’U. feliciani) socardianus — Locard (1893)
Unio crassus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio striatulus Drouët, 1882
Drouët, 1882, Unionidae de Serbie: 19.
(homonym of Unio striatulus Lea, 1857; renamed Unio striolatus Drouët, 1884)

Unio striatulus — Drouët (1882), Kobelt (1886)
Unio striolatus — Drouët (1889), Westerlund (1890)
Unio crassus cytherea — Haas (1940)
Unio nanus — Lopes-Lima et al. (2024)

Unio truncatulus Drouët, 1882
Drouët, 1882, Unionidae de Serbie: 12.
(homonym of Unio rhomboideus var. truncatulus de Joannis, 1859)

Unio truncatulus — Drouët (1882), Kobelt (1886), Westerlund (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio dokici Drouët, 1884
Drouët, 1884, Suppl. Unionidae de Serbie: 5, pl. 1, fig. 1.

Unio dokici — Drouët (1884), Kobelt (1886), Westerlund (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio rivalis Drouët, 1884
Drouët, 1884, Suppl. Unionidae de Serbie: 13.

Unio rivalis — Drouët (1884), Kobelt (1886), Westerlund (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio serbicus Drouët, 1884
Drouët, 1884, Suppl. Unionidae de Serbie: 9, pl. 1, fig. 1.

Unio serbicus — Drouët (1884), Kobelt (1886), Westerlund (1890)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio striolatus Drouët, 1884
Drouët, 1884, Suppl. Unionidae de Serbie: 9.
(new name for Unio striatulus Drouët, 1882)

Unio striolatus — Drouët (1884), Drouët (1889), Westerlund (1890)
Unio crassus cytherea — Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio duregicus Servain, 1885
Servain, 1885, Bull. Soc. Malac. France 2: 331.

Unio duregicus — Servain (1885), Westerlund (1890)
Unio (Fusculusiana) duregicus — Locard (1889)
Unio consentaneus ostiorum — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio ostiorum Servain, 1885
‘Brot, mss.’ Servain, 1885, Bull. Soc. Malac. France 2: 327.

Unio ostiorum — Servain (1885)
Unio (Sandriana) necomensis — Locard (1889)
Unio neocomensis — Westerlund (1890)
Unio consentaneus ostiorum — Kobelt & Haas (1910)
Unio mancus var. macrorhynchus — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio sandriopsis Servain, 1885
‘Bourguignat, mss.’ Servain, 1885, Bull. Soc. Malac. France 2: 325.

Unio sandriopsis — Servain (1885), Westerlund (1890)
Unio (Sandriana) sandriopsis — Locard (1889)
Unio (Groupe de l’U. macrorhynchus) sandriopsis — Locard (1893)
Unio mancus var. macrorhynchus — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio subrobustus Servain, 1885
‘Bourguignat, mss.’ Servain, 1885, Bull. Soc. Malac. France 2: 332.

Unio subrobustus — Servain (1885), Westerlund (1890)
Unio (Socardiana) subrobustus — Locard (1889)
Unio (Groupe de l’U. feliciani) subrobustus — Locard (1893)
Unio crassus — Germain (1931)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio tiguricus Servain, 1885
Servain, 1885, Bull. Soc. Malac. France 2: 329.

Unio tiguricus — Servain (1885), Westerlund (1890)
Unio (Sandriana) tiguricus — Locard (1889)
Unio consentaneus ostiorum — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio turicus Servain, 1885
Servain, 1885, Bull. Soc. Malac. France 2: 327.

Unio turicus — Servain (1885), Westerlund (1890)
Unio (Sandriana) turicus — Locard (1889)
Unio consentaneus ostiorum — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio kochii Kobelt, 1886
Sandberger & Koch, 1851, Jb. Nassau. Ver. Naturk. 7: 245 [as ‘U. moquinianus’].
Kobelt, 1886, Jb. Nassau. Ver. Naturk. 39: 97, pl. 6, fig. 1.
Kobelt, 1886, Icon. Land- und Süssw.-Moll. 2: 46, pl. 56, figs. 295-296.

Unio kochii — Kobelt (1886)
Unio kochi — Kobelt (1886), Westerlund (1890)
Unio crassus crassus — Haas (1940), Haas (1969)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus var. taunica Kobelt, 1886
Kobelt, 1886, Jb. Nassau. Ver. Naturk. 39: 96, pl. 7, fig. 5.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus var. taunica — Kobelt (1886)
Unio batavus var. ater — Clessin (1877)
Unio (sec. Hyridella) batavus vr. taunicus — Paetel (1890)
Unio batavus var. taunicus — Westerlund (1890)
Unio batavus taunicus — Haas (1910)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio badiellus Drouët, 1888
Drouët, 1888, J. de Conch. 36: 107.
Drouët, 1889, Mém. Acad. Sci. Dijon 1: 76, pl. 1, fig. 4.

Unio badiellus — Drouët (1888), Drouët (1889), Westerlund (1890)
Unio (Locardiana) badiellus — Locard (1889)
Unio (Groupe de l’U. batavus) badiellus — Locard (1893)
Unio batavus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio bosnicus Locard, 1889
‘Bourguignat’ Locard, 1889, Contr. Faune Malacol. Franc. 13: 132 [26].
(new name for Unio bosnensis Möllendorff, 1874)

Unio bosnicus — Locard (1889), Westerlund (1890)
Unio (Fusculusiana) bosnicus — Locard (1889)
Unio crassus cytherea — Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio euthymeanus Locard, 1889
Locard, 1889, Contr. Faune Malacol. Franc. 13: 166 [60], 245 [139].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 203.
Type(s): LECTOTYPE MNHN_22202, La Saône à Collonges (Rhône).

Unio euthymeanus — Locard (1889), Westerlund (1890)
Unio (Vinceleusiana) euthymeanus — Locard (1889)
Unio (Groupe de l’U. tumens) euthymeanus — Locard (1893)
Unio batavus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio ignari Locard, 1889
‘Nilss.’ Drouët, 1857, Étud. Naïades. France, Unio: 72, pl. 4, fig. 1 [as ‘U. ater’].
Bourguignat in Locard, 1889, Contr. Faune Malacol. Franc. 13: 146 [40], 213 [107].
‘Bourguignat’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 176.
Type(s): SYNTYPES MNHN_22270, Le Mandrezey, à Saulcy-sur-Meurthe (Vosges).

Unio ignari — Locard (1889), Westerlund (1890)
Unio (Ateriana) ignari — Locard (1889)
Unio (Groupe de l’U. ater) ignari — Locard (1893)
Unio consentaneus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio jurianus Locard, 1889
Locard, 1889, Contr. Faune Malacol. Franc. 13: 129 [23], 187 [81].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 157, fig. 171 [as ‘juranus’].
Type(s): LECTOTYPE MNHN_22292, La Valouze (Jura).

Unio jurianus — Locard (1889), Westerlund (1890)
Unio (Mancusiana) jurianus — Locard (1889)
Unio (Groupe de l’U. mancus) juranus — Locard (1893)
Unio mancus var. amnicus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio manculus Locard, 1889
Locard, 1889, Contr. Faune Malacol. Franc. 13: 130 [24], 190 [84].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 156.
Type(s): LECTOTYPE MNHN_22329, Gigny (Jura).

Unio manculus — Locard (1889), Westerlund (1890)
Unio (Mancusiana) manculus — Locard (1889)
Unio (Groupe de l’U. mancus) manculus — Locard (1893)
Unio mancus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio mancus mancus — Prie (2012)
Unio nanus — Lopes-Lima et al. (2024)

Unio nubilus Locard, 1889
Locard, 1889, Contr. Faune Malacol. Franc. 13: 138 [32], 198 [92].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 165, fig. 179.
(homonym of Unio nubilus Lea, 1868)
Type(s): LECTOTYPE MNHN_22414, Verpillière (Isère).

Unio nubilus — Locard (1889), Westerlund (1890), Rochebrune (1903)
Unio (Nubilusiana) nubilus — Locard (1889)
Unio (Groupe de l’U. locardianus) nubilus — Locard (1893)
Unio mancus var. elongatulus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio orbus Locard, 1889
Locard, 1889, Contr. Faune Malacol. Franc. 13: 138 [32], 195 [89].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 165.
Type(s): LECTOTYPE MNHN_22427, Pentoise (Jura).

Unio orbus — Locard (1889), Westerlund (1890)
Unio (Locardiana) orbus — Locard (1889)
Unio (Groupe de l’U. locardianus) orbus — Locard (1893)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio passavanti Locard, 1889
Bourguignat in Locard, 1889, Contr. Faune Malacol. Franc. 13: 159 [53], 238 [132].
‘Bourguignat’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 178.
Type(s): POSSIBLE SYNTYPE MNHN_22442, Passavant (Haute-Seine).

Unio passavanti — Locard (1889), Westerlund (1890)
Unio (Mariana) passavanti — Locard (1889)
Unio (Groupe de l’U. ater) passavanti — Locard (1893)
Unio consentaneus var. moquini — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio mancus moquinianus — Prie (2012)
Unio nanus — Lopes-Lima et al. (2024)

Unio redactus Drouët, 1889
Drouët, 1889, Mém. Acad. Sci. Dijon 1: 79, pl. 1, fig. 2.

Unio redactus — Drouët (1889), Kobelt (1893)
Unio (Amnicusiana) amnicus — Locard (1889)
Unio amnicus — Westerlund (1890)
Unio nana — Kobelt & Haas (1910)
Unio mancus var. amnicus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio scotinus Locard, 1889
Locard, 1889, Contr. Faune Malacol. Franc. 13: 148 [42], 218 [112].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 178, fig. 192.
Type(s): LECTOTYPE MNHN_22518, Selles (Haute-Saône).

Unio scotinus — Locard (1889), Westerlund (1890)
Unio (Ateriana) scotinus — Locard (1889)
Unio (Groupe de l’U. ater) scotinus — Locard (1893)
Unio consentaneus var. moquini — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio mancus moquinianus — Prie (2012)
Unio nanus — Lopes-Lima et al. (2024)

Unio stygnus Locard, 1889
Locard, 1889, Contr. Faune Malacol. Franc. 13: 148 [42], 219 [113].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 179.
Type(s): LECTOTYPE MNHN_22556, Passavant (Haute-Saône).

Unio stygnus — Locard (1889), Westerlund (1890)
Unio (Ateriana) stygnus — Locard (1889)
Unio (Groupe de l’U. ater) stygnus — Locard (1893)
Unio consentaneus var. moquini — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio mancus moquinianus — Prie (2012)
Unio nanus — Lopes-Lima et al. (2024)

Unio valliericus Locard, 1889
Bourguignat in Locard, 1889, Contr. Faune Malacol. Franc. 13: 139 [33], 199 [93].
‘Bourguignat’ Locard, 1893, Coqu. Eau Douce Saumâtre France: 165.
Type(s): SYNTYPE MNHN_22592, l’Albane (Côte-d’Or).

Unio valliericus — Locard (1889), Westerlund (1890)
Unio (Nubilusiana) valliericus — Locard (1889)
Unio (Groupe de l’U. locardianus) valliericus — Locard (1893)
Unio mancus var. elongatulus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio zoasthenus Locard, 1889
Locard, 1889, Contr. Faune Malacol. Franc. 13: 128 [22], 186 [80].
Locard, 1893, Coqu. Eau Douce Saumâtre France: 155.
Type(s): LECTOTYPE MNHN_22602, Bois-Vieux (Jura).

Unio zoasthenus — Locard (1889), Westerlund (1890), Rochebrune (1903)
Unio (Melasiana) zoasthenus — Locard (1889)
Unio (Groupe de l’U. melas) zoasthenus — Locard (1893)
Unio mancus — Germain (1931)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio mancus mancus — Prie (2012)
Unio nanus — Lopes-Lima et al. (2024)

Unio hassiae Haas, 1908
Haas, 1908, Nachr. Bl. Dtsch. Malak. Ges. 40: 175.

Unio hassiae — Haas (1908)
Unio batavus hassiae — Kobelt & Haas (1910)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio pseudocrassus Haas, 1909
Haas, 1909, Beitr. Kenntn. Mittleleurop. Najadeen, Beilage zu... 41: 29.

Unio pseudocrassus — Haas (1909)
Unio batavus pseudocrassus — Kobelt & Haas (1910)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio brandisi Kobelt, 1910
Kobelt, 1910, Icon. Land- und Süssw.-Moll. 15: 82, pl. 419, figs. 2434-2435.

Unio brandisi — Kobelt (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio nanus — Lopes-Lima et al. (2024)

Unio travnicensis Kobelt, 1910
Kobelt, 1910, Icon. Land- und Süssw.-Moll. 15: 83, pl. 420, figs. 2436-2438.

Unio travnicensis — Kobelt (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus badensis Haas, 1910
Haas, 1910, Mitteleur. Najad., Beiträge Nachr. Bl. Dtsch. Malak. Ges. (4): 60.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus badensis — Haas (1910)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus sabulosus Haas, 1910
Haas, 1910, Mitteleur. Najad., Beiträge Nachr. Bl. Dtsch. Malak. Ges. (4): 59.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus sabulosus — Haas (1910)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus forma elongata Clessin, 1910
Clessin, 1910, Nachr. Bl. Dtsch. Malak. Ges. 42: 66.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807; homonym of Unio elongata Lamarck, 1819)

Unio batavus forma elongata — Clessin (1910)
Unio consentaneus elongatus — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus abnobae Kobelt & Haas, 1910
Kobelt & Haas, 1910, Icon. Land- und Süssw.-Moll. 17: 23, pl. 458, figs. 2473-2477.
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus abnobae — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus biandeti Kobelt & Haas, 1910
Kobelt & Haas, 1910, Icon. Land- und Süssw.-Moll. 17: 22, pl. 457, fig. 2470.
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus biandeti — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus bodamicus Kobelt & Haas, 1910
Kobelt & Haas, 1910, Icon. Land- und Süssw.-Moll. 17: 21, pl. 456, figs. 2465-2466.
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus bodamicus — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus dilatatus Kobelt & Haas, 1910
Kobelt & Haas, 1910, Icon. Land- und Süssw.-Moll. 17: 18, pl. 453, figs. 2447-2448; 23, pl. 457, fig. 2472.

Unio consentaneus dilatatus — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus elongatus Kobelt & Haas, 1910
Kobelt & Haas, 1910, Icon. Land- und Süssw.-Moll. 17: 20, pl. 455, figs. 241.
(homonym of Unio elongata Lamarck, 1819; intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus elongatus — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus hohenwarti Kobelt, 1910
Kobelt, 1910, Icon. Land- und Süssw.-Moll. 15: 78, pl. 418, fig. 2427.
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus hohenwarti — Kobelt (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus langi Kobelt, 1910
Kobelt, 1910, Icon. Land- und Süssw.-Moll. 15: 70, pl. 415, fig. 2414.
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus langi — Kobelt (1910)
Unio consentaneus var. langi — Kobelt (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus marisaensis Kobelt & Haas, 1910
Kobelt & Haas, 1910, Icon. Land- und Süssw.-Moll. 17: 57, pl. 479, figs. 2559-2562.
Kobelt & Haas, 1910, Icon. Land- und Süssw.-Moll. 17: pl. 479 [caption, as “marisensis”].

Unio consentaneus marisaensis — Kobelt & Haas (1910)
Unio crassus cytherea — Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus subterminalis Kobelt, 1910
Kobelt, 1910, Icon. Land- und Süssw.-Moll. 15: 80, pl. 418, fig. 2429.
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus subterminalis — Kobelt (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio consentaneus thayacus Kobelt, 1910
Kobelt, 1910, Icon. Land- und Süssw.-Moll. 15: 69, pl. 414, figs. 2410-2411; pl. 415, fig. 2413.
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836)

Unio consentaneus thayacus — Kobelt (1910)
Unio consentaneus var. thayacus — Kobelt (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio (consentaneus var. ?) gallensteini Kobelt, 1910
Kobelt, 1910, Icon. Land- und Süssw.-Moll. 15: 79, pl. 418, fig. 2428.
(intro'd as intra-sp. of Unio consentaneus Rossmässler, 1836; homonym of Unio lijacensis var. gallensteini Kobelt, 1890)

Unio (consentaneus var. ?) gallensteini — Kobelt (1910)
Unio crassus cytherea — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus hexameri Haas, 1911
Haas, 1911, Verh. Naturhist. Ver. Preuß. Rheinl. 68: 526, pl. 4, fig. 2.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus hexameri — Haas (1911)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus palatinus Haas, 1911
Haas, 1911, Verh. Naturhist. Ver. Preuß. Rheinl. 68: 525, pl. 4, fig. 3.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus palatinus — Haas (1911)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus probavaricus Haas, 1911
Haas, 1911, Verh. Naturhist. Ver. Preuß. Rheinl. 68: 526, pl. 4, fig. 9.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus probavaricus — Haas (1911)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus forma pseudoconsentaneus Geyer, 1911
Geyer, 1911, Jh. Ver. Vaterl. Naturkde. Württemb. 67: 365, pl. 5, fig. 3.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus forma pseudoconsentaneus — Geyer (1911)
Unio crassus batavus — Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus distinguendus C. Boettger, 1912
C. Boettger, 1912, Arch. Naturg. 78: 305, pl. 1, fig. 7.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus distinguendus — C. Boettger (1912)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus navensis C. Boettger, 1912
C. Boettger, 1912, Arch. Naturg. 78: 305, pl. 5, figs. 1-3.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus navensis — C. Boettger (1912)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio batavus kobeltianus Haas, 1913
Haas, 1913, Nachr. Bl. Dtsch. Malak. Ges. 45: 105.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)

Unio batavus kobeltianus — Haas (1913)
Unio crassus batavus — Haas (1940), Haas (1969)
Unio nanus — Lopes-Lima et al. (2024)

Unio crassus Soroka, 2005
‘Philippson’ of Authors.
Soroka, 2005, Zool. Sci. 22: 1138, Table 1.
Soroka, 2010, Folia Malac. 18(4): Table 2. [in part]
Reis et al., 2013, Graellsia 69(1): 22, Table 2.
Prié & Puillandre, 2014, Hydrobiologia 735(1): online resource 1 [as ‘Unio crassus crassus’].
Douda et al., 2014, J. Appl. Ecol. 51: 1087. [in part]
Froufe et al., 2016, Org Divers Evol 16(3): 606, fig. 3. [in part]
Klishko et al., 2017, Zootaxa 4286(1): 98, Table 3.
Soroka & Burzynski, 2017, mtDNA B 2(2): 863.
Burzynski et al., 2017, MPE 107: 606.
Lopes-Lima et al., 2017, Biol. Rev. 92(1): Table S1 [as ‘Unio crassus crassus’]. [in part]
Araujo et al., 2018, J. Linn. Soc., Zool. 182(2): supplementary table. [in part]
Klishko et al., 2018, Systemat. Biodiv. 16(3): 291.
Burzynski & Soroka, 2018, PeerJ 6, e5573: 3.
Wang et al., 2018, Conserv. Genet. Resour. 10(4): 611.
Wang et al., 2018, Conserv. Genet. Resour. 11: 140.
Cha et al., 2018, mtDNA B 3(2): 946.
Aunins et al., 2018, mtDNA B 3(2): 1125.
Wu et al., 2018, PLoS One 13(8), e0200956: 6. [in part]
Klishko et al., 2019, Ruthenica 29(1): 57, Table 1.
Wu et al., 2019, ZooKeys 812: 29.
Huang et al., 2019, MPE 130: Table S5. [in part]
Fukata & Iigo, 2019, mtDNA B 4(2): 3489.
Guerra et al., 2019, BMC Evol. Biol. 19 (229): Table S1.
Froufe et al., 2019, Heredity 124: 185.
Soroka, 2020, J. Zool. Syst. Evol. Res. 58(2): Table 2.
Fukata & Iigo, 2020, mtDNA B 5(2): 1216.
Sano et al., 2020, Plankton Benthos Res. 15(2): 99.
Wu et al., 2020, Invert. Syst. 34: Table S2.
Kilikowska et al., 2020, Life 10(7): 1. [in part]
Lopes-Lima et al., 2021, MPE 163: fig. 6 [by voucher number]. [in part]
Sayenko et al., 2021, Systemat. Biodiv. 19: 58, Table 1.
Wu et al., 2021, J. Lake Sci. 33(6): attached Table 2.
Zieritz et al., 2021, Zool. J. Linn. Soc. 193(3): 1092.
Kim et al., 2021, mtDNA B 6(1): 80.
Pfarrer et al., 2022, Hydrobiologia 849: ESM1.
Wu et al., 2022, Zool. Scripta 51: Table S2.
Dai et al., 2023, Invert. Syst. 37(2): Table 2.
Chen et al., 2023, ZooKeys 1173: Table 1.
Wu et al., 2023, Org Divers Evol (2023): Table 2.
Dai et al., 2024, Zool. Scripta 53: Table 1.
Wu et al., 2024, J. Zool. Syst. Evol. Res. 2024, 1499508: Table 2.
Wu et al., 2024, Zool. Scripta early online: Table S3.
Dai et al., 2024, Invert. Syst. 38(6): Table 3. [in part]
(misidentified reference to Unio crassus Retzius, 1788)

Unio crassus — Soroka (2005)
Unio nanus — Lopes-Lima et al. (2024)

Taxonomic History (since 1900)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio (sec. Lymnium) pictorum — Simpson (1900), Simpson (1914)
Unio nubilus — Rochebrune (1903)
Unio zoasthenus — Rochebrune (1903)
Unio (Rhomboïdiana) nana — Germain (1904)
Unio (Socardiana) riparius — Germain (1904)
Unio (Batavusiana) carynthiacus — Germain (1904)
Unio (Fusculusiana) fusculus — Germain (1904)
Unio (Melasiana) melas — Germain (1904)
Unio (Batavusiana) potamius — Germain (1904)
Unio (Groupe des Ninusiana) nanus — Caziot (1907)
Unio (Groupe des Amnicusiana) amnicus — Caziot (1907)
Unio (Groupe des Mancusiana) dubisianus — Caziot (1907)
Unio hassiae — Haas (1908)
Unio pseudocrassus — Haas (1909)
Unio nana — Kobelt & Haas (1910)
Unio consentaneus ovatus — Kobelt & Haas (1910)
Unio consentaneus minor — Kobelt & Haas (1910)
Unio consentaneus — Kobelt (1910), Germain (1931)
Unio consentaneus var. — Kobelt & Haas (1910)
Unio consentaneus squamosus — Kobelt (1910), Kobelt & Haas (1910)
Unio heldii — Kobelt & Haas (1910)
Unio consentaneus ostiorum — Kobelt & Haas (1910)
Unio batavus taunicus — Haas (1910)
Unio batavus hassiae — Kobelt & Haas (1910)
Unio batavus pseudocrassus — Kobelt & Haas (1910)
Unio brandisi — Kobelt (1910)
Unio travnicensis — Kobelt (1910)
Unio batavus badensis — Haas (1910)
Unio batavus sabulosus — Haas (1910)
Unio batavus forma elongata — Clessin (1910)
Unio consentaneus elongatus — Kobelt & Haas (1910)
Unio consentaneus abnobae — Kobelt & Haas (1910)
Unio consentaneus biandeti — Kobelt & Haas (1910)
Unio consentaneus bodamicus — Kobelt & Haas (1910)
Unio consentaneus dilatatus — Kobelt & Haas (1910)
Unio consentaneus hohenwarti — Kobelt (1910)
Unio consentaneus langi — Kobelt (1910)
Unio consentaneus var. langi — Kobelt (1910)
Unio consentaneus marisaensis — Kobelt & Haas (1910)
Unio consentaneus subterminalis — Kobelt (1910)
Unio consentaneus thayacus — Kobelt (1910)
Unio consentaneus var. thayacus — Kobelt (1910)
Unio (consentaneus var. ?) gallensteini — Kobelt (1910)
Unio batavus hexameri — Haas (1911)
Unio batavus palatinus — Haas (1911)
Unio batavus probavaricus — Haas (1911)
Unio batavus forma pseudoconsentaneus — Geyer (1911)
Unio crassus consentaneus — Ortmann (1912)
Unio batavus distinguendus — C. Boettger (1912)
Unio batavus navensis — C. Boettger (1912)
Unio cytherea cytherea — Haas (1913)
Unio cytherea nessorhynchus — Haas (1913)
Unio batavus kobeltianus — Haas (1913)
Unio mancus var. nanus — Germain (1931)
Unio crassus — Germain (1931), Soroka (2005), Graf (2007), Anisimova et al. (2018), Araujo et al. (2018), Bogatov et al. (2018)
Unio crassus var. piscinalis — Germain (1931)
Unio batavus — Germain (1931)
Unio mancus var. amnicus form riparius — Germain (1931)
Unio mancus var. amnicus — Germain (1931)
Unio mancus var. macrorhynchus — Germain (1931)
Unio mancus — Germain (1931)
Unio mancus var. elongatulus — Germain (1931)
Unio consentaneus var. moquini — Germain (1931)
Unio (s.s.) crassus consentancus — Zhadin (1938)
Unio crassus batavus — Haas (1940), Haas (1969), Lopes-Lima et al. (2017)
Unio crassus crassus — Haas (1940), Haas (1969), Klishko et al. (2017), Lopes-Lima et al. (2017)
Unio crassus cytherea — Haas (1940), Haas (1969), Fauna Europaea (2012), Prié & Puillandre (2014), Lopes-Lima et al. (2017)
Batavusiana (s.s.) nana — Zatravkin (1983), Zatravkin (1987)
Batavusiana (s.s.) fuscula — Zatravkin (1983), Zatravkin (1987)
Batavusiana (s.s.) fuscula fuscula — Stadnichenko (1984)
Unio (Crassiana) crassus nanus — Falkner et al. (2001), Falkner et al. (2002)
Unio (Crassiana) crassus riparius — Falkner et al. (2001), Falkner et al. (2002)
Unio (Crassiana) crassus cytherea — Falkner et al. (2001), Falkner et al. (2002)
Unio (Crassiana) crassus decurvatus — Falkner et al. (2001)
Unio (Crassiana) crassus albensis — Falkner et al. (2001)
Unio (Crassiana) crassus ondovensis — Falkner et al. (2001)
Crassiana (Bataviana) nana — Starobogatov et al. (2004)
Crassiana (Bataviana) fuscula — Starobogatov et al. (2004)
Crassiana nana nana — Kantor & Sysoev (2005), Kantor et al. (2010)
Crassiana fuscula — Kantor & Sysoev (2005), Kantor et al. (2010)
Unio mancus mancus — Prie (2012)
Unio mancus moquinianus — Prie (2012)
Unio pictorum — He & Zhuang (2013)
Unio crassus nanus — Prié & Puillandre (2014)
Unio (Crassiana) nana — Vinarski & Kantor (2016)
Unio (s.s.) pictorum — Vinarski & Kantor (2016)
Unio (Crassiana) crassus — Vinarski & Kantor (2016)
Unio (Crassiana) fusculus — Vinarski & Kantor (2016)
Unio crassus nana — Bogatov (2022)
Unio crassus musivus — Bogatov (2022)
Unio nanus — Lopes-Lima et al. (2024)