species Potomida littoralis (Cuvier, 1798): synonymy

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), Campbell et al. (2005)
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), ... Campbell & Lydeard (2026), Wu et al. (2026), Prie et al. (2026), Wu et al. (2026), Nahok et al. (2026)
Psilunio littoralis fellmanni — Daget (1998)
Potamida [sic] littoralis — Bába (2000)
“Psilunio littoralis” ** — Giribet & Wheeler (2002), Giribet & Distel (2003), Jeffrey et al. (2016)
“Potomida littoralis” ** — Huff et al. (2004), Vikhrev et al. (2018)
“Potomida littoralis 1” ** — Whelan et al. (2011)
Potomida littoralis 2 — Whelan et al. (2011)
“Potomida littoralis” ** — Bolotov et al. (2020), Konopleva et al. (2021), Jeratthitikul et al. (2021), Bolotov et al. (2022), Jeratthitikul et al. (2022), ... Jeratthitikul et al. (2024), Dai et al. (2024), Jeratthitikul et al. (2025), Dai et al. (2025), Chen et al. (2025)

Mya crassa Vallot, 1801

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

Psilunio littoralis — Germain (1931)

Unio granosus Schumacher, 1817

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

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)
Psilunio littoralis littoralis — Haas (1940)
Caelatura [sic] brevialis — Haas (1969)
Potomida littoralis littoralis — Haas (1969)
Potomida littoralis — Graf & Cummings (2009), Araujo et al. (2009)

Unio litoralis ‘Lamarck’ of Authors

(error for Unio littoralis Cuvier, 1798)
‘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.

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

Unio draparnaldii Deshayes, 1831

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

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 Farines in 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

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

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

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

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)
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

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

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

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

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

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

Unio litoralis var. umbonatus Rossmässler, 1844

(intro'd as intra-sp. of Unio littoralis Cuvier, 1798)
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.

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 ‘Dupuy’ of Authors

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

Unio draparnaudi ‘Deshayes’ of Authors

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

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

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

Unio littoralis var. irregularis Drouët, 1857

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

Unio rhomboideus var. truncatulus de Joannis, 1859

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

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

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

Psilunio littoralis fellmanni — Daget (1998)

Unio rhomboideus var. radiata Bourguignat, 1864

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

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 ‘Dupuy’ of Authors

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

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

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

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 Bourguignat in 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)
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

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

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

Unio pacomei Bourguignat in 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 ‘Millet’ of Authors

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

Unio calderoni var. salvadori Westerlund, 1892

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

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

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

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

(homonym of Unio sphaericus Lea, 1868; correct name for Unio spehaericus Locard, 1893)
‘Bourguignat’ Locard, 1893. Coqu. Eau Douce Saumâtre France: 153 [as ‘sphæricus’].
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

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

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

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

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

Unio littoralis var. incrassatus Drouët, 1898

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

Unio littoralis var. subtriangularis Drouët, 1898

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

Unio ovuliformis Locard, 1899

Locard, 1899. Conchyliol. Portug.: 216.

Psilunio littoralis littoralis — Haas (1940)

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

(intro'd as intra-sp. of Unio littoralis Cuvier, 1798)
Kobelt, 1903. Icon. Land- und Süssw.-Moll. 10: 28, pl. 279, fig. 1795.
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 Haas in Bofill & Haas, 1920

(intro'd as intra-sp. of Mya batava Maton & Rackett, 1807)
Haas in Bofill & Haas, 1920. Mus. Cienc. Nat. Barcelona 3: 291, 363, pl. 3, figs. 19-22.
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

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

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

Unio martelli ‘Pallary’ of Authors

(error for Unio marteli Pallary, 1918)
‘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].

Unio mauretanicus Van Damme, 1984

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

Psilunio littoralis fellmanni — Daget (1998)

Unio crassus Vallot 1801 of Authors

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

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

Unio orbicularis ‘Maud.’ of Authors

‘Maud.’ of Authors.

Unio sinuatus Rossmässler, 1836

(misidentified reference to Unio sinuata Lamarck, 1819)
‘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.

Psilunio littoralis — Germain (1931)

Unio littoralis Rossmässler, 1837

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

Unio litoralis var. elongatus Rossmässler, 1844

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

Unio littoralis Morelet, 1845

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

Unio littoralis var. compressa Gassies, 1849

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

Unio bigorrensis Lea, 1852

(error for Unio bigerrensis Millet, 1843)
‘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.

Unio cuneatus Rossmässler, 1854

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

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

Unio batavus Moquin-Tandon, 1855

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

Unio (Rhomboïdiana) mauduyti — Germain (1904)

Unio littoralis Drouët, 1857

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

Unio litoralis Mousson, 1861

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

Potomida littoralis semirugata — Schütt (1983)

Unio rhomboideus Mousson, 1862

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

Unio batavus Bourguignat, 1864

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

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

Unio rhomboideus Bourguignat, 1864

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

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

Unio ater Reeve, 1865

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

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

Unio rhomboidus Malzine, 1867

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

Margaron (Unio) fellmani Lea, 1870

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

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

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

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

Unio maccarthyanus Kobelt, 1886

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

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

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

Unio gaudiensis Westerlund, 1890

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

Unio spehaericus Locard, 1893

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

Unio simonis Kobelt & Rolle, 1895

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

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

Unio maccarthianus Locard, 1899

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

Unio barrandii Simpson, 1900

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

Unio valentinus Simpson, 1900

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

Unio rhomboideus var. minor Pallary, 1921

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

Unio rhomboideus var. minor — Pallary (1921)

Unio rhysopigus Araujo et al., 2009

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