Unio littoralis Cuvier, 1798
Schröter, 1779. Gesch. Flußconch.: pl. 2, fig. 3.
Bruguière, 1797. Encycl. Méth. 2: pl. 248, fig. 2 [as Unio sp.].
Cuvier, 1798. Tab. Elem. Hist. Nat. Anim.: 425.
Lamarck, 1801. Sys. Anim. sans Vert.: 114.
Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 76, sp. 25.
Type(s): SYNTYPES MHNG_UNKNOWN, France, common in the Seine.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio (Rhomboïdiana) rhomboideus — Germain (1904)
Migranaja littoralis — Hannibal (1912)
Rhombunio littoralis — Haas (1924)
Psilunio littoralis — Germain (1931), Thiele (1934), Van Damme (1984), Mandahl-Barth (1988), Giribet & Wheeler (2002), Giribet & Distel (2003), Campbell et al. (2005), Jeffrey et al. (2016)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969), Falkner et al. (2001), Falkner et al. (2002), Lopes-Lima et al. (2017)
Potomida littoralis — Schütt (1988), Falkner (1994), Nagel et al. (1998), Nagel & Badino (2001), Machordom et al. (2003), ... Dai et al. (2024), Zhang et al. (2024), Jeratthitikul et al. (2025), Dai et al. (2025), Dai et al. (2025)
Psilunio littoralis fellmanni — Daget (1998)
Potamida [sic] littoralis — Bába (2000)
Potomida littoralis 1 — Whelan et al. (2011)
Potomida littoralis 2 — Whelan et al. (2011)

Mya crassa Vallot, 1801
Vallot, 1801. Exerc. hist. nat.: 7.

Psilunio littoralis — Germain (1931)

Unio granosus Schumacher, 1817
Schumacher, 1817. Essai. Nouv. Syst.: 138, pl. 11, fig. 1.
(homonym of Unio granosa Bruguière, 1792)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio brevialis Lamarck, 1819
Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 73, sp. 14.
Type(s): LECTOTYPE MNHN_21212 (by Graf & Cummings, 2009: [11]), Habite à l’Isle de France.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
— Haas (1936), Daget (1998)
Psilunio littoralis littoralis — Haas (1940)
Caelatura [sic] (s.s.) brevialis — Haas (1969)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Graf & Cummings (2009), Araujo et al. (2009)

Unio litoralis Menke, 1828
‘Lamarck’ of Authors.
Menke, 1828. Syn. Method. Moll.: 64.
Menke, 1830. Syn. Method. Moll.: 107.
Lea, 1836. Synopsis Fam. Naiades: 32.
Lea, 1838. Synopsis Fam. Naiades: 22.
Swainson, 1840. Treat. Malacol.: 282.
Lea, 1852. Synopsis Fam. Naiades: 34.
Rossmässler, 1854. Icon. Land- und Süssw.-Moll. 3 (1-2): 37.
Küster, 1855. Conchyl. Cab. 9(2): 128.
Reeve, 1865. Conch. Icon. 16: pl. 22, sp. 98.
Sowerby, 1868. Conch. Icon. 16: pl. 86, sp. 461.
Lea, 1870. Synopsis Fam. Naiades: 54.
Woodward, 1871. Man. Moll: 433.
Westerlund, 1890. Fauna Paläarct. Binnenconch. 2(7): 52.
(error for Unio littoralis Cuvier, 1798)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio draparnaldii Deshayes, 1831
Deshayes, 1831. Descr. Coqu. Terr.: 43, pl. 14, fig. 6.
(renamed Unio littoralis var. subtriangularis Drouët, 1898)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio (Rhomboïdiana) rhomboideus — Germain (1904)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio incurvus Lea, 1831
Lea, 1831. Trans. Amer. Phil. Soc. 4 [O. 1]: 97, pl. 13, fig. 27.
Type(s): HOLOTYPE (MONOTYPY) USNM_85731, Gibralter.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Psilunio littoralis umbonatus — Haas (1940)
Potomida littoralis umbonata — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio subtetragonus Michaud, 1831
Michaud, 1831. Compl. Hist. Nat. Moll., Draparnaud: 111, pl. 16, fig. 23.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio (Rhomboïdiana) rhomboideus — Germain (1904)
Unio (Groupe Rhomboïdeana) rhomboideus ve subtetragonus — Caziot (1907)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009), Fauna Europaea (2012)

Unio pianensis Boubée, 1833
Farines in Boubée, 1833. Bull. Hist. nat. France 1: 19.
Farines, 1834. Ann. des Sci. Nat. 2: 118.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio (Rhomboïdiana) rhomboideus — Germain (1904)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969), Lopes-Lima et al. (2017)
Potomida littoralis pianensis — Falkner et al. (2001), Falkner et al. (2002)
Potomida littoralis — Araujo et al. (2009), IUCN (2014)

Unio cuneatus Jacquemin, 1835
Jacquemin, 1835. Guide Ror. Arles: 124.
(homonym of Unio cuneatus Swainson, 1823)

Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969), Lopes-Lima et al. (2017)
Potomida littoralis cuneata — Falkner et al. (2001), Falkner et al. (2002)
Potomida littoralis — Araujo et al. (2009), IUCN (2014)

Unio rotundatus Mauduyt, 1839
Mauduyt, 1839. Tableau Indic. Moll. Vienne: 9, pl. 1, fig. 3-4.
(homonym of Unio rotundata Lamarck, 1819; renamed Unio mauduyti Germain, 1897)

Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio rotundatus — Rochebrune (1903)
Unio (Rhomboïdiana) mauduyti — Germain (1904)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Mysca (Potomida) corrugata Swainson, 1840
Swainson, 1840. Treat. Malacol.: 268-269, fig. 51; 281-282, fig. 57; 379.

Parreysia (s.s.) corrugata — Simpson (1900), Simpson (1914), Preston (1915)
Potomida littoralis semirugata — Ellis (1946)
Potomida (s.s.) littoralis semirugata — Haas (1969)
— Haas (1969)
Potomida littoralis — Graf & Cummings (2007), Graf & Cummings (2021), Lopes-Lima et al. (2021)

Unio barraudii Bonhomme, 1840
Bonhomme, 1840. Mém. Aveyron 2: 430.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio littoralis var. minor Rossmässler, 1842
Rossmässler, 1842. Icon. Land- und Süssw.-Moll. 2 (5): 14, pl. 55, figs. 743. [in part]
(intro'd as intra-sp. of Unio littoralis Cuvier, 1798; homonym of Unio margaritifer var. minor Rossmässler, 1835)
Type(s): TYPE SMF_4431, Carcassonne, S. Frankreich.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio (Rhomboïdiana) rhomboideus minor — Germain (1904)
Unio (Groupe Rhomboïdeana) rhomboideus ve minor — Caziot (1907)

Unio bigerrensis Millet, 1843
Millet, 1843. Mag. Zool.: 3, pl. 64, fig. 2.
‘Millet’ Locard, 1882. Prodr. Malac. Franç. 1: 284 [as ‘bigorriensis’].
(renamed Unio bigorriensis Locard, 1882)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio littoralis var. elongata Dupuy, 1843
Dupuy, 1843. Essai Moll. Terr. Fluv. du Gers: 86.
Dupuy, 1852. Hist. Natur. Moll. France (6): pl. 24, fig. 5.
(homonym of Unio elongata Lamarck, 1819)

Unio (Rhomboïdiana) rhomboideus elongata — Germain (1904)
Unio (Groupe Rhomboïdeana) rhomboideus ve elongata — Caziot (1907)

Unio litoralis var. umbonatus Rossmässler, 1844
Rossmässler, 1844. Icon. Land- und Süssw.-Moll. 2 (6): 27, pl. 56, fig. 754.
Rossmässler, 1854. Icon. Land- und Süssw.-Moll. 3 (1-2): 36, pl. 69, fig. 849.
(intro'd as intra-sp. of Unio littoralis Cuvier, 1798)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Psilunio littoralis umbonatus — Haas (1940)
Potomida littoralis umbonata — Haas (1969)
Potomida littoralis — Araujo et al. (2009), IUCN (2014)
Potomida littoralis littoralis — Lopes-Lima et al. (2017)

Unio fellmanni Deshayes, 1847
Deshayes, 1847. Exploration scientifique de l’Algérie: pl. 108, figs. 8-9; pl. 109, fig. 9; pls. 110-111; pl. 112, figs. 1-4.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio rhomboideus var. fellmanni — Pallary (1921)
Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969), Graf & Cummings (2007)
Psilunio littoralis — Mandahl-Barth (1988)
Potomida littoralis — IUCN (2014)

Unio astierianus Dupuy, 1849
Dupuy, 1849. Cat. Extramar. Galliae Test.: no. 320.
Dupuy, 1851. Hist. Natur. Moll. France (5): pl. 23, figs. 9a-d.
Dupuy, 1852. Hist. Natur. Moll. France (6): 636.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio moulinsianus Dupuy, 1851
Dupuy, 1851. Hist. Natur. Moll. France (5): pl. 24, figs. 10a-b.
Dupuy, 1852. Hist. Natur. Moll. France (6): 640.

Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Unio (Groupe Rhomboïdeana) moulinsianus — Caziot (1907)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio asterianus Lea, 1852
‘Dupuy’ of Authors.
Lea, 1852. Synopsis Fam. Naiades: 39.
Germain, 1931. Faune de France 22: 720.
(error for Unio astierianus Dupuy, 1849)

Unio draparnaudi Moquin-Tandon, 1855
‘Deshayes’ of Authors.
Moquin-Tandon, 1855. Hist. Natur. Moll. France 2: 569.
de Joannis, 1859. Ann. Soc. Linn. Maine-et-Loire 3: 283.
(error for Unio draparnaldii Deshayes, 1831)

Unio (Rhomboïdiana) rhomboideus — Germain (1904)

Unio rhomboideus Moquin-Tandon, 1855
Schröter, 1779. Gesch. Flußconch.: 186, pl. 2, fig. 3 [as ‘Mya rhomboidea’]. [non-binomial]
Moquin-Tandon, 1855. Hist. Natur. Moll. France 2: 568, pl. 48, figs. 4-9; pl. 49, figs. 1-2.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio rhomboideus — Rochebrune (1903)
Unio (Rhomboïdiana) rhomboideus — Germain (1904)
Unio (Groupe Rhomboïdeana) rhomboideus — Caziot (1907)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009), Fauna Europaea (2012)

Unio littoralis var. complanata Drouët, 1857
Drouët, 1857. Étud. Naïades. France, Unio: 215, 218.
(homonym of Mya complanata Lightfoot, 1786; intro'd as intra-sp. of Unio littoralis Cuvier, 1798)

Unio littoralis var. irregularis Drouët, 1857
Drouët, 1857. Étud. Naïades. France, Unio: 218, 215.
(intro'd as intra-sp. of Unio littoralis Cuvier, 1798)

Unio rhomboideus var. truncatulus de Joannis, 1859
de Joannis, 1859. Ann. Soc. Linn. Maine-et-Loire 3: 283, pl. 8, fig. 5.
(intro'd as intra-sp. of Unio rhomboideus Moquin-Tandon, 1855)

Unio (Rhomboïdiana) rhomboideus — Germain (1904)

Unio unduliferus Küster, 1861
Küster, 1861. Conchyl. Cab. 9(2): 162, pl. 46, fig. 4.

Psilunio littoralis littoralis — Haas (1940)
Psilunio littoralis fellmanni — Haas (1940)
Potomida littoralis fellmanni — Haas (1969)

Unio subreniformis Bourguignat, 1863
Bourguignat, 1863. Moll. Nouv. Litig. Peu Connus: 138, pl. 34, figs. 4-6.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009), Fauna Europaea (2012)

Unio rhomboideus var. minor Bourguignat, 1864
Bourguignat, 1864. Mal. Alg. 2: 286, pl. 18, figs. 1-3.
(misidentified reference to Unio margaritifer var. minor Rossmässler, 1835)

Psilunio littoralis fellmanni — Daget (1998)

Unio rhomboideus var. radiata Bourguignat, 1864
Bourguignat, 1864. Mal. Alg. 2: 285, pl. 18, figs. 1-10.
(homonym of Unio (Elliptio) viridis var. radiata Rafinesque, 1820)

Unio (Rhomboïdiana) rhomboideus radiata — Germain (1904)
Psilunio littoralis fellmanni — Daget (1998)

Unio maccarthyanus Bourguignat, 1866
Bourguignat, 1866. Moll. Nouv. Litig. Peu Connus: 220, pl. 34, figs. 8-10.

Unio (sec. Lymnium) ravoisieri — Simpson (1900)
Unio (sec. Lymnium) turtoni var. moreleti — Simpson (1914)
Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)

Unio valentianus Sowerby, 1866
Sowerby, 1866. Conch. Icon. 16: pl. 41, sp. 225.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio astieranus Sowerby, 1868
‘Dupuy’ of Authors.
Sowerby, 1868. Conch. Icon. 16: pl. 86, sp. 461.
Paetel, 1890. Cat. Conch.-Samml. 3: 145.
(error for Unio astierianus Dupuy, 1849)

Unio (sec. Lymnium) littoralis — Simpson (1900)

Unio mauritanicus Bourguignat, 1868
Bourguignat, 1868. Moll. Nouv. Litig. Peu Connus: 317, pl. 45, figs. 1-5.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio rhomboideus — Pallary (1921)
Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)

Unio hippopotami Bourguignat, 1869
Bourguignat, 1869. Cat. Moll. Terr. Fluv. Paris Quaternaire: 21, pl. 3, figs. 52-54.

Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio ksibianus Mousson, 1873
Mousson, 1873. Malak. Blatt. 21: 156.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio rhomboideus — Pallary (1921)
Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)

Unio bigorriensis Locard, 1882
‘Millet’ Locard, 1882. Prodr. Malac. Franç. 1: 284.
‘Millet’ Locard, 1889. Contr. Faune Malacol. Franc. 13: 125 [19].
(new name for Unio bigerrensis Millet, 1843)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Unio (Groupe Rhomboïdeana) bigorriensis — Caziot (1907)
Psilunio littoralis — Germain (1931)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio rathymus Locard, 1882
Bourguignat in Locard, 1882. Prodr. Malac. Franç. 1: 284, 354.
‘Bourguignat’ Locard, 1889. Contr. Faune Malacol. Franc. 13: 125 [19], 184 [78].
‘Bourguignat’ Locard, 1893. Coqu. Eau Douce Saumâtre France: 152, fig. 166.
Bourguignat in Locard, 1899. Conchyliol. Portug.: 215.
Type(s): IDIOTYPE MNHN_22482, la Seine près Paris.

Unio rathymus — Rochebrune (1903)
Unio (Rhomboïdiana) rathymus — Germain (1904)
— Simpson (1914)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio jolyi Kobelt, 1886
‘(Bourg.?)’ Kobelt, 1886. Icon. Land- und Süssw.-Moll. 2: 22, pl. 41, fig. 256.

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)
Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)

Unio rouirei Letourneux & Bourguignat, 1887
Letourneux & Bourguignat, 1887. Prodr. Malacol. Terr. Fluv. Tunisie: 164.

Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)

Unio zenaticus Letourneux & Bourguignat, 1887
Letourneux & Bourguignat, 1887. Prodr. Malacol. Terr. Fluv. Tunisie: 163.

Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)

Unio calderoni Kobelt, 1888
Kobelt, 1888. Icon. Land- und Süssw.-Moll. 3: 54, pl. 88, fig. 494.

Psilunio littoralis umbonatus — Haas (1940)
Potomida littoralis umbonata — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio gandiensis Drouët, 1888
Drouët, 1888. J. de Conch. 36: 103.
Type(s): SYNTYPE SMF_4427, A.d. Serpis b. Gandia, Prov. Valencia, Spanien.

Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio hispalensis Kobelt, 1888
Kobelt, 1888. Icon. Land- und Süssw.-Moll. 3: 53, pl. 88, fig. 492.

Psilunio littoralis umbonatus — Haas (1940)
Potomida littoralis umbonata — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio littoralis var. pianensis Kobelt, 1888
Kobelt, 1888. Icon. Land- und Süssw.-Moll. 4: 43, pl. 163, fig. 1648.
(reference to Unio pianensis Boubée, 1833)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio pacomei Locard, 1889
Bourguignat in Locard, 1889. Contr. Faune Malacol. Franc. 13: 126 [20], 185 [79].
‘Bourguignat’ Locard, 1893. Coqu. Eau Douce Saumâtre France: 154.
Type(s): SYNTYPE MNHN_22440, Couzon (Rhône).

Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio bigerriensis Paetel, 1890
‘Millet’ of Authors.
Paetel, 1890. Cat. Conch.-Samml. 3: 146, 157.
Germain, 1931. Faune de France 22: 720.
(error for Unio bigerrensis Millet, 1843)

Unio calderoni var. salvadori Westerlund, 1892
Westerlund, 1892. Nachr. Bl. Dtsch. Malak. Ges. 24: 201.
(intro'd as intra-sp. of Unio calderoni Kobelt, 1888)

Psilunio littoralis umbonatus — Haas (1940)
Potomida littoralis umbonata — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio circinatus Drouët, 1893
Drouët, 1893. J. de Conch. 41: 167.
Type(s): SYNTYPE SMF_4428, Aus dem Jucar b. Algemesi, Prov. Valencia, Span.

Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio circulus Locard, 1893
‘Bourguignat’ Locard, 1893. Coqu. Eau Douce Saumâtre France: 153.
(homonym of Unio circulus Lea, 1829)

Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio rhysopygus Drouët, 1893
Drouët, 1893. J. de Conch. 41: 168.

Unio rhysopygus — Kobelt (1903)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio sphaericus Locard, 1893
‘Bourguignat’ Locard, 1893. Coqu. Eau Douce Saumâtre France: 153 [as ‘sphæricus’].
(homonym of Unio sphaericus Lea, 1868; correct name for Unio spehaericus Locard, 1893)
Type(s): IDIOTYPE MNHN_22552, La Saône à Collonges (Rhône).

Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio mauduyti Germain, 1897
Germain, 1897. Bull. Soc. Sci. Nat. Rouen 33: 72.
Germain, 1904. Bull. Soc. Sci. Nat. Ouest France 4: 254 [16].
(new name for Unio rotundatus Mauduyt, 1839)

Unio (Rhomboïdiana) mauduyti — Germain (1904)
Psilunio littoralis — Germain (1931)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio littoralis var. bucheti Pallary, 1898
Pallary, 1898. J. de Conch. 46: 151.
Pallary, 1921. J. de Conch. 66: 215 [as ‘Unio rhomboideus var. bucheti’].
(intro'd as intra-sp. of Unio littoralis Cuvier, 1798)

Unio rhomboideus var. bucheti — Pallary (1921)
Psilunio littoralis fellmanni — Haas (1940), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)

Unio littoralis var. incrassatus Drouët, 1898
Drouët, 1898. Mém. Acad. Sci. Dijon ??: 85.
(intro'd as intra-sp. of Unio littoralis Cuvier, 1798; homonym of Unio incrassatus Lea, 1840)

Unio littoralis var. subtriangularis Drouët, 1898
Drouët, 1898. Mém. Acad. Sci. Dijon ??: 85.
(new name for Unio draparnaldii Deshayes, 1831)

Unio ovuliformis Locard, 1899
Locard, 1899. Conchyliol. Portug.: 216.

Psilunio littoralis littoralis — Haas (1940)
— Haas (1969)

Unio littoralis var. pequignoti Pallary, 1901
Pallary, 1901. Mém. Soc. Géol. France, Paléo. 22: 187, pl. 4, fig. 1.
Type(s): HOLOTYPE MNHN_MP_0080, Pleistocene de la Macta, Algerie.

Psilunio littoralis fellmanni — Daget (1998)

Unio littoralis taginus Kobelt, 1903
Kobelt, 1903. Icon. Land- und Süssw.-Moll. 10: 28, pl. 279, fig. 1795.
(intro'd as intra-sp. of Unio littoralis Cuvier, 1798)
Type(s): TYPE SMF_4425, A.d. Tajo b. Toledo.

Unio littoralis taginus — Kobelt (1903)
Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio kinkelini Haas, 1908
Haas, 1908. Nachr. Bl. Dtsch. Malak. Ges. 40: 177.

Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Unio marteli Pallary, 1918
Pallary, 1918. Bull. Soc. Hist. Nat. Afr. Nord., Alger 9: 151.
Type(s): SYNTYPES BMNH_1937-12-30-13036-13037, Fez.

Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)
Potomida littoralis — Graf & Cummings (2011)

Unio batavus catalonicus Bofill & Haas, 1920
Haas in Bofill & Haas, 1920. Mus. Cienc. Nat. Barcelona 3: 291, 363, pl. 3, figs. 19-22.
(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)
Type(s): TYPE SMF_3972, Rio Sio b. Balaguer, Prov. Lerida, Spanien.

Psilunio littoralis littoralis — Haas (1940)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Araujo et al. (2009)

Rhombunio asananus Pallary, 1928
Pallary, 1928. J. de Conch. 72: 20, pl. 3, figs. 1-2.

Psilunio littoralis fellmanni — Haas (1940), Van Damme (1984), Daget (1998)
Potomida littoralis fellmanni — Haas (1969)

Unio (Psilunio) rothi var. rotundata Pallary, 1939
Pallary, 1939. Mém. Inst. Égypte 39: 119.
(homonym of Unio rotundata Lamarck, 1819; intro'd as intra-sp. of Unio rothi Bourguignat, 1863)

Unio (Psilunio) rothi var. rotundata — Pallary (1939)

Unio martelli Haas, 1969
‘Pallary’ of Authors.
Haas, 1969. Das Tierreich 88: 276.
Van Damme, 1984. Freshw. Moll. N. Africa (25): 59.
Daget, 1998. Cat. Bivalves Africains: 85.
Graf & Cummings, 2011. Hydrobiologia 678: [3].
(error for Unio marteli Pallary, 1918)

Unio mauretanicus Van Damme, 1984
Van Damme, 1984. Freshw. Moll. N. Africa (25): 59.
(error for Unio mauritanicus Bourguignat, 1868)

Psilunio littoralis fellmanni — Daget (1998)

Unio crassus Reeve, 1865
Vallot 1801 of Authors.
‘Retz.’ Reeve, 1865. Conch. Icon. 16: pl. 22, sp. 98 [as syn. under U. littoralis].
(misidentified reference to Unio crassus Retzius, 1788)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio orbicularis of Authors, unknown year
‘Maud.’ of Authors.

Unio sinuatus Rossmässler, 1836
‘Lam.’ Rossmässler, 1836. Icon. Land- und Süssw.-Moll. 1 (3): pl. 13, fig. 195.
Rossmässler, 1854. Icon. Land- und Süssw.-Moll. 3 (1-2): pl. 70, fig. 853.
(misidentified reference to Unio sinuata Lamarck, 1819)

Psilunio littoralis — Germain (1931)

Unio littoralis Rossmässler, 1837
Rossmässler, 1837. Icon. Land- und Süssw.-Moll. 1 (5-6): 21, pl. 24, fig. 340.
(reference to Unio littoralis Cuvier, 1798)

Unio litoralis var. elongatus Rossmässler, 1844
Rossmässler, 1844. Icon. Land- und Süssw.-Moll. 2 (6): 27, pl. 56, fig. 752.
(reference to Unio littoralis var. elongata Dupuy, 1843)
Type(s): LECTOTYPE SMF_4434A, Vic-de-Bigorre [Vic-en-Bigorre].

Unio littoralis Morelet, 1845
Morelet, 1845. Moll. Terr. Fluv. Portugal: pl. 14, fig. 1.
(reference to Unio littoralis Cuvier, 1798)

Unio littoralis var. compressa Gassies, 1849
Gassies, 1849. Moll. Agenais: 198. [nomen nudum]
(intro'd as intra-sp. of Unio littoralis Cuvier, 1798)

Unio bigorrensis Lea, 1852
‘Millet’ Lea, 1852. Synopsis Fam. Naiades: 39.
‘Millet’ Küster, 1861. Conchyl. Cab. 9(2): 230.
‘Millet’ Lea, 1870. Synopsis Fam. Naiades: 63.
‘Locard’ Simpson, 1900. Proc. U.S. Nat. Mus. 22: 692.
(error for Unio bigerrensis Millet, 1843)

Unio cuneatus Rossmässler, 1854
‘Jacq.’ Rossmässler, 1854. Icon. Land- und Süssw.-Moll. 3 (1-2): 37, pl. 69, fig. 851.
(reference to Unio cuneatus Jacquemin, 1835)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio batavus Moquin-Tandon, 1855
Moquin-Tandon, 1855. Hist. Natur. Moll. France 2: 573.
(misidentified reference to Mya batava Maton & Rackett, 1807)

Unio (Rhomboïdiana) mauduyti — Germain (1904)

Unio littoralis Drouët, 1857
Drouët, 1857. Étud. Naïades. France, Unio: pl. 3, fig. 2. [in part]
(reference to Unio littoralis Cuvier, 1798)

Unio litoralis Mousson, 1861
Mousson, 1861. Vjschr. naturf. Ges. Zürich: ??.
(error for Unio littoralis Cuvier, 1798; reference to Unio littoralis Cuvier, 1798)

Potomida littoralis semirugata — Schütt (1983)

Unio rhomboideus Mousson, 1862
Mousson, 1862. Coq. terr. et fluv. rec. par Roth en Palestine: 64.
(reference to Unio rhomboideus Moquin-Tandon, 1855)

Unio batavus Bourguignat, 1864
Bourguignat, 1864. Mal. Alg. 2: 286, pl. 19, figs. 9-11; pl. 20, figs. 1-4.
(misidentified reference to Mya batava Maton & Rackett, 1807)

Unio (sec. Lymnium) batavus — Simpson (1900), Simpson (1914)
Psilunio littoralis fellmanni — Van Damme (1984)
Unio elongatulus durieui — Daget (1998)

Unio rhomboideus Bourguignat, 1864
‘Moquin-Tandon’ Bourguignat, 1864. Mal. Alg. 2: 284, pl. 18.
(reference to Unio rhomboideus Moquin-Tandon, 1855)

Unio rhomboideus — Pallary (1921)
Psilunio littoralis fellmanni — Van Damme (1984), Daget (1998)

Unio ater Reeve, 1865
‘Nilsson’ Reeve, 1865. Conch. Icon. 16: pl. 21, fig. 91.
(misidentified reference to Unio ater Nilsson, 1822)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio rhomboidus Malzine, 1867
‘Schroter’ Malzine, 1867. Essai faun. malac. Belg.: 32.
(error for Unio rhomboideus Moquin-Tandon, 1855)

Margaron (Unio) fellmani Lea, 1870
‘Desh.’ Lea, 1870. Synopsis Fam. Naiades: 46.
(error for Unio fellmanni Deshayes, 1847)

Unio marisgalilaei Lortet, 1880
‘Locard’ Lortet, 1880. C. R. Acad. Sci. 91: 502 [as ‘maris-galilæi’]. [nomen nudum]

Potomida littoralis semirugata — Schütt (1983)

Unio letourneuxi Kobelt, 1886
Kobelt, 1886. Icon. Land- und Süssw.-Moll. 2: 3, pl. 32, fig. 227.
(misidentified reference to Unio letourneuxi Bourguignat, 1864)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio maccarthyanus Kobelt, 1886
Kobelt, 1886. Icon. Land- und Süssw.-Moll. 2: 5, pl. 33, fig. 229 [as ‘mac carthyanus’].
(reference to Unio maccarthyanus Bourguignat, 1866)

Unio (sec. Lymnium) littoralis — Simpson (1900), Simpson (1914)

Unio bagnolasicus Locard, 1889
‘Bourguignat’ Locard, 1889. Contr. Faune Malacol. Franc. 13: 127 [21], footnote. [nomen nudum]

Unio bouthyi Locard, 1889
‘Pechaud’ Locard, 1889. Contr. Faune Malacol. Franc. 13: 127 [21], footnote. [nomen nudum]

Unio cossonianus Locard, 1889
‘Bourguignat’ Locard, 1889. Contr. Faune Malacol. Franc. 13: 127 [21], footnote. [nomen nudum]

Unio odontopachius Locard, 1889
‘Bourguignat’ Locard, 1889. Contr. Faune Malacol. Franc. 13: 127 [21], footnote. [nomen nudum]

Unio seguyanus Locard, 1889
‘Pechaud’ Locard, 1889. Contr. Faune Malacol. Franc. 13: 127 [21], footnote. [nomen nudum]

Unio valeryi Locard, 1889
‘Bourguignat’ Locard, 1889. Contr. Faune Malacol. Franc. 13: 127 [21], footnote. [nomen nudum]

Unio cuncetus Westerlund, 1890
‘Jacquemin’ Westerlund, 1890. Fauna Paläarct. Binnenconch. 2(7): 54.
(error for Unio cuneatus Jacquemin, 1835)

Unio gaudiensis Westerlund, 1890
‘Drouët’ Westerlund, 1890. Fauna Paläarct. Binnenconch. 2(7): 55.
(error for Unio gandiensis Drouët, 1888)

Unio spehaericus Locard, 1893
Locard, 1893. Coqu. Eau Douce Saumâtre France: 153.
(incorrect original spelling of Unio sphaericus Locard, 1893)

Unio simonis Kobelt & Rolle, 1895
Kobelt & Rolle, 1895. Iconogr. Land-Süßw.-Moll., Supplement 1 (1-4): 18, pl. 3, figs. 1-3.
(misidentified reference to Unio simonis Tristram, 1865)

Unio (sec. Lymnium) semirugatus — Simpson (1900)
Potomida littoralis semirugata — Schütt (1983)

Unio maccarthianus Locard, 1899
Locard, 1899. Conchyliol. Portug.: 215 [as ‘mac-carthianus’].
(error for Unio maccarthyanus Bourguignat, 1866)

Unio barrandii Simpson, 1900
‘Dupuy’ Simpson, 1900. Proc. U.S. Nat. Mus. 22: 692.
‘Dupuy’ Simpson, 1914. Descr. Cat. Naiades: 555.
(error for Unio barraudii Bonhomme, 1840)

Unio valentinus Simpson, 1900
‘Sowerby’ Simpson, 1900. Proc. U.S. Nat. Mus. 22: 692.
‘Sowerby’ Simpson, 1914. Descr. Cat. Naiades: 555.
(error for Unio valentianus Sowerby, 1866)

Unio rhomboideus var. minor Pallary, 1921
Pallary, 1921. J. de Conch. 66: 215.
(homonym of Unio margaritifer var. minor Rossmässler, 1835; intro'd as intra-sp. of Unio rhomboideus Bourguignat, 1864)

Unio rhomboideus var. minor — Pallary (1921)

Unio rhysopigus Araujo et al., 2009
‘Drouet’ Araujo et al., 2009. Iberus 27(2): 29.
(error for Unio rhysopygus Drouët, 1893)