species Anodontites trapesialis (Lamarck, 1819): synonymy

Anodonta exotica Lamarck, 1819

Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 87, sp. 12.
Type(s): POSSIBLE SYNTYPE MNHN_MPL_0007, de Amérique de Sud acheté de la vente de M. Faujas St. Frond [South America purchased from Mr. Faujas St. Frond] “Paratype” according to Johnson (1952).

Glabaris (s.s.) trapesialis var. exoticus — Simpson (1900)
Anodonta exotica — Corsi (1900)
Anodontites (s.s.) trapesialis var. exoticus — Simpson (1914)
Anodontites (s.s.) exoticus exoticus — Haas (1931), Haas (1969)
Anodontites exotica — Pilsbry (1933)
Glabaris trapesialis — Modell (1942)
Anodontites (s.s.) trapesialis trapesialis — Figueiras (1965)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodonta sinuosa Lamarck, 1819

Bruguière, 1797. Encycl. Méth. 2: pl. 203 [204], fig. 2a-b [as Anodontites sp.].
Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 87, sp. 14.
Type(s): POSSIBLE SYNTYPE MNHN_MPL_0009, [unknown].

Glabaris (s.s.) sinuosus — Simpson (1900)
Anodontites (s.s.) sinuosa — Simpson (1914)
Anodontites sinuosus — Marshall (1915)
Anodontites (s.s.) exoticus exoticus — Haas (1931), Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodonta trapesialis Lamarck, 1819

Schröter, 1779. Gesch. Flußconch.: pl. 3, fig. 1.
Martini & Chemnitz, 1785. Conchyl. Cab. 8: 185, pl. 86, fig. 762.
Bruguière, 1797. Encycl. Méth. 2: pl. 205, fig. 1a-b [as Anodontites sp.].
Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 87, sp. 11.
Type(s): LECTOTYPE [AS HOLOTYPE] & PARALECTOTYPE MHNG_MOLL_50581 (by R.I. Johnson, 1953: 94), Unknown.

Glabaris (s.s.) trapesialis — Simpson (1900)
Glabaris trapezialis [sic] — Ihering (1910)
Anodontites (s.s.) trapesialis — Simpson (1914), Rumi et al. (2008), Pereira et al. (2014), Torres et al. (2018)
Anodontites trapezialis [sic] — Marshall (1915), H.B. Baker (1930)
Anodontites (s.s.) trapesialis trapesialis — Haas (1931), Figueiras (1965), Haas (1969)
Glabaris trapesialis — Modell (1942)
Anodontites (Pachyanodon) trapezialis trapezialis [sic] — Morretes (1949)
Anodontites trapesialis — Lucena (1951), Simone (1994), Graf (2000), Martinez et al. (2004), Simone (2006), ... Chen et al. (2025), FMCS (2025), Cummings et al. (2025), Campbell & Lydeard (2026), Martínez et al. (2026)
Anodontites trapesialis trapesialis — Mansur & Valer (1992), Ramírez et al. (2003)

Anodonta trapezialis ‘Lamarck’ of Authors

(error for Anodonta trapesialis Lamarck, 1819)
‘Lamarck’ of Authors.
Blainville, 1825. Manuel Malacol. et Conch.: 538.
Bory de St. Vincent, 1827. Encycl. Méth. 2: 147.
Menke, 1828. Syn. Method. Moll.: 63.
Menke, 1830. Syn. Method. Moll.: 106.
Lea, 1834. Trans. Amer. Phil. Soc. 5 [O. 1]: 93.
d’Orbigny, 1835. Mag. Zool. 5(61-62): 43.
Lea, 1836. Synopsis Fam. Naiades: 53.
Lea, 1838. Synopsis Fam. Naiades: 31.
Swainson, 1840. Treat. Malacol.: 287.
Hanley, 1843. Illustr. Descr. Cat. Rec. Bivalve Shells: 220.
d’Orbigny, 1846. Voyage dans l’Amérique Méridionale 5(3): 596.
Lea, 1852. Synopsis Fam. Naiades: 52.
Hupé, 1857. [in] Castelnau, Anim. Nouv. Rares d’Amer. Sud: 85.
Adams & Adams, 1857. Gen. Rec. Moll. 2(31-32): 504.
Lea, 1870. Synopsis Fam. Naiades: 82.
Ihering, 1893. Arch. Naturg. 59(1): 135.
Corsi, 1900. Anais Mus. Nac. Montevideo 2: 456.
Marshall, 1915. Proc. U.S. Nat. Mus. 49(2122): 529.
Haas, 1929. Senckenbergiana 11: 340.
H.B. Baker, 1930. Occ. Pap. Mus. Zool. Univ. Mich. (210): 70.
Morretes, 1949. Arqu. Mus. Paranaense 7: 27.

Glabaris (s.s.) trapesialis — Simpson (1900)
Anodontites (s.s.) trapesialis — Simpson (1914)
Anodontites (s.s.) trapesialis trapesialis — Haas (1931), Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon anserinus Spix in Wagner, 1827

Spix in Wagner, 1827. Test. Fluv. Brasil.: 29, pl. 21, figs. 1-2.

Glabaris (s.s.) trapesialis var. anserinus — Simpson (1900)
Anodonta exotica — Corsi (1900)
Anodontites trapezialis [sic] var. anserinus — F. Baker (1913)
Anodontites (s.s.) trapesialis var. anserinus — Simpson (1914)
Anodontites (s.s.) trapesialis anserina — Ortmann (1921)
Anodontites (s.s.) trapesialis trapesialis — Haas (1931), Haas (1969)
Anodontites (Pachyanodon) trapezialis [sic] anserina — Morretes (1949)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon giganteus Spix in Wagner, 1827

Bruguière, 1797. Encycl. Méth. 2: pl. 205, fig. 1a-b [as Anodontites sp.].
Spix in Wagner, 1827. Test. Fluv. Brasil.: 27, pl. 19, figs. 1-2.
Type(s): PARATYPE SMF_3815, Rio Solimoes, b. Ega, Brasilien.

Glabaris (s.s.) trapesialis — Simpson (1900)
Anodonta exotica — Corsi (1900)
Anodontites (s.s.) trapesialis — Simpson (1914)
Anodontites (s.s.) trapesialis trapesialis — Haas (1931), Haas (1969)
Anodontites trapesialis trapesialis — Mansur & Valer (1992), Ramírez et al. (2003)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon radiatus Spix in Wagner, 1827

Spix in Wagner, 1827. Test. Fluv. Brasil.: 31, pl. 23, fig. 1.
Type(s): SYNTYPE SMF_3840, Staat Minas Gereas, Brasilien.

Glabaris (s.s.) radiatus — Simpson (1900)
Anodonta exotica — Corsi (1900)
Anodontites (s.s.) radiatus — Simpson (1914)
Anodontites (s.s.) exoticus exoticus — Haas (1931), Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodonta glauca Valenciennes, 1827

Lamarck, 1819. Hist. Natur. Anim. sans Vert. 6: 87. [nomen nudum]
Valenciennes, 1827. Receuil Observ. Zool. 2(11-12): 236, pl. 50, fig. 2.
Type(s): LECTOTYPE [AS HOLOTYPE] MHNG-MOLL-50591 (by R.I. Johnson, 1953: 90), Acapulco.

Glabaris (s.s.) glaucus — Simpson (1900)
Anodonta (Patularia) glauca — Martens (1900)
Anodontites (s.s.) glauca — Simpson (1914)
Leila (Pseudoleila) trapezialis [sic]-glauca — Frierson (1927)
Anodontites trapezialis [sic] glaucus — Haas (1929)
Anodontites (s.s.) trapesialis glaucus — Haas (1931), Haas (1969)
Anodontoides glauca — Contreras-Arquieta (2000)
Anodontites trapesialis — Cummings et al. (2025)

Anodon susannae Gray in Griffith & Pidgeon, 1833

Gray in Griffith & Pidgeon, 1833. [in] Cuvier, Animal Kingdom 12(38): pl. 24, fig. 1 [as ‘susannæ’].
Gray in Griffith & Pidgeon, 1834. [in] Cuvier, Animal Kingdom 12(39-40): 595 [as ‘susannæ].

Glabaris (s.s.) trapesialis — Simpson (1900)
Anodontites (s.s.) trapesialis — Simpson (1914)
Anodontites (s.s.) exoticus susannae — Haas (1931), Haas (1969)
Anodontites (s.s.) trapesialis susannae — Bonetto & Mansur (1970), Rumi et al. (2008)
Anodontites trapesialis — Simone (1994), Simone (2006)
Anodontites trapesialis trapesialis — Ramírez et al. (2003)

Anodon penicillatus Gray, 1834

Gray, 1834. Proc. Zool. Soc. London 1834: 57.

Glabaris (s.s.) trapesialis — Simpson (1900)
Anodontites (s.s.) trapesialis — Simpson (1914)
Anodontites (s.s.) exoticus susannae — Haas (1931), Haas (1969)
Anodontites (s.s.) trapesialis susannae — Bonetto & Mansur (1970)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon sinuosis Swainson, 1841

(error for Anodonta sinuosa Lamarck, 1819)
‘Lamarck’ Swainson, 1841. Ex. Conch.: 29, pl. 16.

Glabaris (s.s.) sinuosus — Simpson (1900)
Anodonta (Pseudoleila) ciconia — Martens (1900)
Anodontites (s.s.) sinuosa — Simpson (1914)

Anodonta nicaraguae Philippi, 1849

Philippi, 1849. Zeitschr. f. Malakozool. 5(9): 130.
Type(s): LECTOTYPE MALA.2015.0.619.0.MHN (by Haas, 1930: 322), Nicaragua.

Anodonta (Glabaris) nicaragua — Martens (1900)
Anodontites nicaragua — Simpson (1914)
Leila (Pseudoleila) nicaragua [sic] — Frierson (1927)
Anodontites trapezialis [sic] bridgesii — Haas (1929)
Anodontites (s.s.) trapesialis nicaraguae — Haas (1930)
Anodontites (s.s.) trapesialis glaucus — Haas (1931), Haas (1969)
Anodontites trapesialis — Cummings et al. (2025)

Anodon ciconia Gould, 1851

Gould, 1851. Proc. Boston Soc. Nat. Hist. 4: 92.
Type(s): LECTOTYPE [AS HOLOTYPE] MCZ_169084 (by R.I. Johnson, 1964: 54), Mexico ?

Glabaris (s.s.) trapesialis — Simpson (1900)
Glabaris (s.s.) glaucus — Simpson (1900)
Anodonta (Pseudoleila) ciconia — Martens (1900)
Anodontites (s.s.) trapesialis — Simpson (1914)
Leila (Pseudoleila) ciconia — Frierson (1927)
Anodontites (s.s.) trapesialis nicaraguae — Haas (1930)
Anodontites (s.s.) trapesialis glaucus — Haas (1931), Haas (1969)
Anodontites trapesialis — Cummings et al. (2025)

Anodonta ciconia ‘Gould’ of Authors

(reference to Anodon ciconia Gould, 1851)
‘Gould’ of Authors.
Carpenter, 1857. Maz. Shells: 117.
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(15): 534, pl. 68, 78, figs. 2-2a.
Martens, 1900. Biol. Centr.-Amer., Moll.: 536, pl. 41, fig. 4.

Glabaris (s.s.) glaucus — Simpson (1900)
Anodontites (s.s.) glauca var. sinaloensis — Simpson (1914)

Anodonta burroughiana Chenu, 1858

(misidentified reference to Anodonta burroughiana Lea, 1834)
Chenu, 1858. Illustr. Conchyl.: pl. 3.

Glabaris (s.s.) glaucus — Simpson (1900)
Anodontites (s.s.) glauca — Simpson (1914)

Anodonta forbesiana Lea, 1860

Lea, 1860. Proc. Acad. Nat. Sci. 12: 92.
Lea, 1863. Jour. Acad. Nat. Sci. 5 [O. 10]: 393, pl. 47, fig. 301.
Type(s): HOLOTYPE USNM_86694, Uruguay River.

Glabaris (s.s.) forbesianus — Simpson (1900)
Anodonta forbesiana — Corsi (1900)
Anodontites (s.s.) forbesiana — Simpson (1914), Ortmann (1921)
Anodontites (s.s.) trapesialis forbesianus — Haas (1931), Figueiras (1965), Haas (1969), Mansur (1970), Quintana (1982)
Anodontites (Pachyanodon) forbesiana — Morretes (1949)
Anodontites trapesialis forbesianus — Schade (1965), Mansur et al. (1988), Ramírez et al. (2003)
Anodontites (s.s.) trapesialis susannae — Bonetto & Mansur (1970)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon gigantea ‘Lea’ of Authors

(misidentified reference to Anodonta gigantea Lea, 1838)
‘Lea’ of Authors.
H. Adams, 1866. Proc. Zool. Soc. London 1866: 444 [as ‘Leila gigantea’].
‘Lea’ Sowerby, 1867. Conch. Icon. 17: pl. 8, sp. 19, fig. 18.
Sowerby, 1870. Conch. Icon. 17: pl. 36, sp. 152 [as ‘A. trapezialis Lamarck’].

Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon areolatus Sowerby, 1867

(homonym of Anodon areolatus Swainson, 1829)
Sowerby, 1867. Conch. Icon. 17: pl. 10, sp. 28.

Glabaris (s.s.) trapesialis var. scriptus — Simpson (1900)
Anodontites (s.s.) trapesialis var. scriptus — Simpson (1914)
Anodontites (s.s.) trapesialis trapesialis — Haas (1931), Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon exoticus Sowerby, 1867

(homonym of Anodonta exotica Lamarck, 1819; renamed Leila grayana Frierson, 1922)
‘Gray’ Sowerby, 1867. Conch. Icon. 17: pl. 16, sp. 57.
Type(s): HOLOTYPE BMNH_1965207, Rio de la Plata.

Glabaris (s.s.) moricandii — Simpson (1900)
Anodontites (s.s.) moricandii — Simpson (1914)
Leila grayana — Frierson (1922)
Anodontites trapesialis — Simone (1994)

Anodon scriptus Sowerby, 1867

‘Férussac’ Sowerby, 1867. Conch. Icon. 17: pl. 4, sp. 9.
Type(s): HOLOTYPE BMNH_1964370, Hab._?

Glabaris (s.s.) trapesialis var. scriptus — Simpson (1900)
Anodontites (s.s.) trapesialis var. scriptus — Simpson (1914)
Anodontites (s.s.) trapesialis scripta — Ortmann (1921)
Anodontites (s.s.) trapesialis trapesialis — Haas (1931), Haas (1969)
Anodontites (Pachyanodon) trapezialis [sic] scripta — Morretes (1949)
Leila blainvilliana — Veitenheimer (1973), Ramírez et al. (2003)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon subsinuatus Sowerby, 1867

Sowerby, 1867. Conch. Icon. 17: pl. 7, sp. 14.

Glabaris (s.s.) trapesialis var. scriptus — Simpson (1900)
Anodontites (s.s.) trapesialis var. scriptus — Simpson (1914)
Anodontites (s.s.) trapesialis trapesialis — Haas (1931), Haas (1969)
Leila blainvilliana — Veitenheimer (1973)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodonta bridgesii Lea, 1868

Lea, 1868. Proc. Acad. Nat. Sci. 20: 95.
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 291 [51], pl. 42, fig. 104.
Type(s): LECTOTYPE [AS HOLOTYPE] USNM_86691 (by R.I. Johnson, 1951: 81), Lake Nicaragua.

Glabaris (s.s.) bridgesii — Simpson (1900)
Anodonta (Glabaris) nicaragua — Martens (1900)
Anodontites (s.s.) bridgesii — Simpson (1914)
Leila (Pseudoleila) nicaragua [sic] — Frierson (1927)
Anodontites trapezialis [sic] bridgesii — Haas (1929)
Anodontites (s.s.) trapesialis nicaraguae — Haas (1930)
Anodontites (s.s.) trapesialis glaucus — Haas (1931), Haas (1969)
Anodontites trapesialis — Cummings et al. (2025)

Anodonta exotica ‘Lamarck’ of Authors

(reference to Anodonta exotica Lamarck, 1819)
‘Lamarck’ of Authors.
Martens, 1868. Malak. Blatt. 15: 197.
Pilsbry & Rush, 1896. Nautilus 10: 81.

Anodontites (s.s.) trapesialis forbesianus — Mansur (1970)

Anodonta gigantea ‘Spix’ of Authors

(reference to Anodon giganteus Spix in Wagner, 1827)
‘Spix’ of Authors.
Martens, 1868. Malak. Blatt. 15: 196.
Clessin, 1888. Malak. Blatt. 10: 171.

Anodontites (s.s.) trapesialis forbesianus — Mansur (1970)
Anodontites trapesialis forbesianus — Ramírez et al. (2003)
Anodontites trapesialis — Mansur & Pereira (2006)

Anodonta jewettiana Lea, 1868

Lea, 1868. Proc. Acad. Nat. Sci. 20: 95.
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 289, pl. 41, fig. 101 [as ‘jewettii’].
Type(s): HOLOTYPE (MONOTYPY) USNM_86681, Lake Nicaragua.

Glabaris (s.s.) jewittianus [sic] — Simpson (1900)
Anodonta (Glabaris) jewettii — Martens (1900)
Anodontites (s.s.) jewettianus — Simpson (1914)
Leila (Pseudoleila) nicaragua [sic] — Frierson (1927)
Anodontites (s.s.) trapesialis glaucus — Haas (1969)
Anodontites trapesialis — Bieler (2021), Cummings et al. (2025)

Anodonta jewettii Lea, 1868

(error for Anodonta jewettiana Lea, 1868)
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 289, pl. 41, fig. 101.
Type(s): AUTOMATIC USNM_86681, Lake Nicaragua.

Glabaris (s.s.) jewittianus [sic] — Simpson (1900)
Anodonta (Glabaris) jewettii — Martens (1900)
Anodontites (s.s.) jewettianus — Simpson (1914)
Leila (Pseudoleila) nicaragua [sic] — Frierson (1927)
Anodontites (s.s.) trapesialis nicaraguae — Haas (1930)
Anodontites (s.s.) trapesialis glaucus — Haas (1931), Haas (1969)
Anodontites trapesialis — Bieler (2021), Cummings et al. (2025)

Anodonta wallisi Mousson, 1869

Mousson, 1869. Malak. Blatt. 16: 188.

Anodontites wallisi — Simpson (1914)
Anodontites (s.s.) trapesialis glaucus — Haas (1931), Haas (1969)

Anodon glaucus ‘Valenciennes’ of Authors

(reference to Anodonta glauca Valenciennes, 1827)
‘Valenciennes’ of Authors.
Sowerby, 1870. Conch. Icon. 17: pl. 27, sp. 105.
Clessin, 1876. Conchyl. Cab.: 222, pl. 73, fig. 4.

Glabaris (s.s.) glaucus — Simpson (1900)
Anodonta (Pseudoleila) ciconia — Martens (1900)
Anodontites (s.s.) glauca var. sinaloensis — Simpson (1914)
Leila (Pseudoleila) ciconia — Frierson (1927)

Anodon rioplatensis Sowerby, 1870

Sowerby, 1870. Conch. Icon. 17: pl. 26, sp. 101 [as ‘Rio-Platensis’].

Glabaris (s.s.) trapesialis var. rioplatensis — Simpson (1900)
Anodontites (s.s.) trapesialis var. rioplatensis — Simpson (1914)
Anodontites (s.s.) rioplatensis — Ortmann (1921)
Anodontites (s.s.) trapesialis forbesianus — Haas (1931), Figueiras (1965), Haas (1969), Mansur (1970), Quintana (1982)
Anodontites trapesialis — Simone (1994), Simone (2006)
Anodontites trapesialis trapesialis — Ramírez et al. (2003)
Anodontites trapesialis forbesianus — Ramírez et al. (2003)

Anodonta nicaragua Philippi of Authors

(error for Anodonta nicaraguae Philippi, 1849)
Philippi of Authors.
Tate, 1870. Amer. J. Conch. 5: 161.
B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [7].
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 932.
Haas, 1930. Senckenbergiana 12(6): 324.

Anodonta bahiensis Clessin, 1873

‘Küster’ Clessin, 1873. Conchyl. Cab. 9(1): 94, pl. 20, fig. 2.

Glabaris (s.s.) trapesialis var. scriptus — Simpson (1900)
Anodontites (s.s.) trapesialis var. scriptus — Simpson (1914)
Anodontites (s.s.) trapesialis scripta — Ortmann (1921)
Anodontites (s.s.) exoticus exoticus — Haas (1931), Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodonta angustata Clessin, 1876

Clessin, 1876. Conchyl. Cab.: 226, pl. 74, figs. 6-7.

Glabaris (s.s.) moricandii — Simpson (1900)
Anodontites (s.s.) moricandii — Simpson (1914)
Anodontites (s.s.) exoticus exoticus — Haas (1931), Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodonta glauca var. B sinaloensis Crosse & Fischer, 1884

(intro'd as intra-sp. of Anodonta glauca Valenciennes, 1827)
Crosse & Fischer, 1884. J. de Conch. 31: 219.
Type(s): SYNTYPE MNHN_IM-2000-1707, Rio Presidio, pres Mazatlan, etat de Sinaloa, Mexique.

Glabaris (s.s.) glaucus var. sinaloensis — Simpson (1900)
Anodonta (Pseudoleila) ciconia — Martens (1900)
Anodontites (s.s.) glauca var. sinaloensis — Simpson (1914)
Leila (Pseudoleila) ciconia — Frierson (1927)
Anodontites trapezialis [sic] sinaloensis — Haas (1929)
Anodontites (s.s.) trapesialis nicaraguae — Haas (1930)
Anodontites (s.s.) trapesialis glaucus — Haas (1931), Haas (1969)
Anodontites sinaloensis — Contreras-Arquieta (2000)
Anodontites trapesialis — Cummings et al. (2025)

Anodonta riograndensis Ihering, 1890

Ihering, 1890. Arch. Naturg. 56(1): 158.
Type(s): TYPE SMF_3838, Rio Guahyba, Staat Rio Grande do Sul, Brasilien.

Anodontites (s.s.) riograndensis — Ortmann (1921)
Anodontites (s.s.) exoticus susannae — Haas (1931), Haas (1969)
Anodontites (Pachyanodon) riograndensis — Morretes (1949)
Anodontites (s.s.) trapesialis forbesianus — Figueiras (1965), Mansur (1970)
Anodontites (s.s.) trapesialis susannae — Bonetto & Mansur (1970)
Anodontites trapesialis — Simone (1994), Simone (2006), Mansur & Pereira (2006)
Anodontites trapesialis trapesialis — Ramírez et al. (2003)
Anodontites trapesialis forbesianus — Ramírez et al. (2003)

Glabaris simpsonianus Pilsbry, 1896

Pilsbry, 1896. Proc. Acad. Nat. Sci. 48: 564, pl. 27, fig. 13.
Type(s): FIGURED SYNTYPE ANSP_41845, Rio de la Plata.

Glabaris (s.s.) simpsonianus — Simpson (1900)
Anodontites (s.s.) simpsonianus — Simpson (1914)
Anodontites (s.s.) exoticus susannae — Haas (1931), Haas (1969)
Anodontites (s.s.) trapesialis forbesianus — Mansur (1970)
Anodontites (s.s.) trapesialis susannae — Bonetto & Mansur (1970)
Anodontites trapesialis — Simone (1994), Simone (2006)
Anodontites trapesialis forbesianus — Ramírez et al. (2003)

Glabaris trapesialis var. cygneiformis Pilsbry, 1896

(intro'd as intra-sp. of Anodonta trapesialis Lamarck, 1819)
Pilsbry, 1896. Proc. Acad. Nat. Sci. 48: 563, pl. 26, figs. 5-6.
Type(s): SYNTYPES ANSP_69741, pond, near Maldonado, Uruguay.

Glabaris (s.s.) trapesialis var. cygnæformis [sic] — Simpson (1900)
Anodonta trapezialis v. cigneiformis [sic] — Corsi (1900)
Anodontites (s.s.) trapesialis var. cygnæformis [sic] — Simpson (1914)
Anodontites (s.s.) exoticus susannae — Haas (1931), Haas (1969)
Anodontites (s.s.) trapesialis forbesianus — Figueiras (1965), Mansur (1970), Quintana (1982)
Anodontites (s.s.) trapesialis susannae — Bonetto & Mansur (1970)
Anodontites trapesialis — Simone (1994), Simone (2006)
Anodontites trapesialis forbesianus — Ramírez et al. (2003)

Anodonta jewittiana ‘Lea’ of Authors

(error for Anodonta jewettiana Lea, 1868)
‘Lea’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 927.
Frierson, 1927. Check List N. Amer. Naiades: 97.

Anodontites (s.s.) jewettianus — Simpson (1914)

Anodonta jewittii ‘Lea’ of Authors

(error for Anodonta jewettii Lea, 1868)
‘Lea’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 927.
Frierson, 1927. Check List N. Amer. Naiades: 97.
‘Lea’ Haas, 1931. Senckenbergiana 13: 99.

Glabaris (s.s.) umbonatus Simpson, 1900

‘Gould’ Sowerby, 1870. Conch. Icon. 17: pl. 29, sp. 115, fig. 115b [as ‘Anodon ciconia’]. [in part]
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 926, footnote.
Simpson, 1914. Descr. Cat. Naiades: 1436.

Glabaris (s.s.) umbonatus — Simpson (1900)
Anodontites (s.s.) umbonatus — Simpson (1914)
Anodontites (s.s.) trapesialis forbesianus — Haas (1969)

Glabaris dulcis Ihering, 1910

Ihering, 1910. Abh. Senckenb. Naturf. Ges. 32: 132, pl. 12, figs. 5a-b.
Type(s): TYPE SMF_3841, Fazenda do Sacramento, Mun. de Sao Domingo do Prata, Minas Gereas, Geb. des Rio Doce.

Glabaris dulcis — Ihering (1910)
Anodontites (s.s.) dulcis — Simpson (1914)
Anodontites (s.s.) exoticus exoticus — Haas (1931), Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodontites aurora Marshall, 1915

Marshall, 1915. Proc. U.S. Nat. Mus. 49(2122): 529, pl. 69.
Type(s): HOLOTYPE (ORIG. DESIG.) USNM_273689, Ceara, Brazil.

Anodontites aurora — Marshall (1915)
Anodontites (Styganodon) aurora — Morretes (1949)
Anodontites (s.s.) exoticus exoticus — Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodontites darochai Marshall, 1915

Marshall, 1915. Proc. U.S. Nat. Mus. 49(2122): 528, pl. 68.
Type(s): HOLOTYPE (ORIG. DESIG.) USNM_273687, Ceara, Brazil.

Anodontites darochai — Marshall (1915)
Anodontites (Pachyanodon) trapezialis [sic] darochai — Morretes (1949)
Anodontites (s.s.) exoticus exoticus — Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodontites salmonea Marshall, 1915

Marshall, 1915. Proc. U.S. Nat. Mus. 49(2122): 528, pl. 67.
Type(s): HOLOTYPE (ORIG. DESIG.) USNM_273688, Ceara, Brazil.

Anodontites salmonea — Marshall (1915)
Anodontites (Styganodon) crispata salmonea — Morretes (1949)
Anodontites (s.s.) patagonicus patagonicus — Haas (1969)
Anodontites trapesialis — Simone (2006)

Leila grayana Frierson, 1922

(new name for Anodon exoticus Sowerby, 1867)
‘Gray’ Sowerby, 1867. Conch. Icon. 17: pl. 16, sp. 57.
Frierson, 1922. Nautilus 36: 9.

Leila grayana — Frierson (1922)
Anodontites trapesialis — Simone (2006)

Anodontites flucki Walker, 1924

Walker, 1924. Nautilus 38(2): 53, pl. 1, figs. 3-4.
Type(s): HOLOTYPE (ORIG. DESIG.) UMMZ_112641, Wanks River (Rio Coco), near Sang Sangta, Nicaragua.

Anodontites (s.s.) trapesialis glaucus — Haas (1969)
Anodontites trapesialis — Cummings et al. (2025)

Anodontites marcusi Mendes, 1939

Mendes, 1939. Bol. Biol. São Paulo 4: 481, 5 Abb.

Anodontites (s.s.) exoticus susannae — Haas (1969)
Anodontites trapesialis — Simone (1994), Simone (2006)

Anodonta trapezia ‘Küster’ of Authors

(error for Anodonta trapezialis ‘Lamarck’ of Authors)
‘Küster’ of Authors.

Anodonta exotica Cuvier, 1817

(reference to Anodonta exotica Lamarck, 1819)
‘Lamarck’ Cuvier, 1817. Règne Animal 2: pl. 90, figs. 1-1a.

Unio (Anodontes) exotica var. A elongata d’Orbigny, 1835

(intro'd as intra-sp. of Anodonta exotica Lamarck, 1819; homonym of Anodon elongatus Swainson, 1823)
d’Orbigny, 1835. Mag. Zool. 5(61-62): 39 [as ‘Var. A’].

Anodontites trapesialis — Simone (1994), Simone (2006)

Unio (Anodontes) exotica var. B oblonga d’Orbigny, 1835

(intro'd as intra-sp. of Anodonta exotica Lamarck, 1819)
d’Orbigny, 1835. Mag. Zool. 5(61-62): 39 [as ‘Var. B’].

Anodontites trapesialis — Simone (1994), Simone (2006)

Unio (Anodontes) exotica var. C larga d’Orbigny, 1835

(intro'd as intra-sp. of Anodonta exotica Lamarck, 1819)
d’Orbigny, 1835. Mag. Zool. 5(61-62): 39 [as ‘Var. C’].

Anodontites trapesialis — Simone (1994), Simone (2006)

Iridina trapezialis d’Orbigny, 1846

(reference to Anodonta trapesialis Lamarck, 1819)
d’Orbigny, 1846. Voyage dans l’Amérique Méridionale 5(3): 596.

Anodonta esula Gray, 1847

(misidentified reference to Iridina esula d’Orbigny, 1835)
‘Orb.’ Gray, 1847. Proc. Zool. Soc. London 15: 197.

Anodontites trapesialis — Simone (1994), Simone (2006)

Anodon pencillatus Lea, 1852

(error for Anodon penicillatus Gray, 1834)
‘Gray’ Lea, 1852. Synopsis Fam. Naiades: 52.
‘Gray’ Lea, 1870. Synopsis Fam. Naiades: 83.

Anodon blainvilleana Sowerby, 1867

(error for Anodonta blainvilliana Lea, 1834; misidentified reference to Anodonta blainvilliana Lea, 1834)
‘Lea’ Sowerby, 1867. Conch. Icon. 17: pl. 6, sp. 12.

Glabaris (s.s.) trapesialis — Simpson (1900)
Anodontites (s.s.) trapesialis — Simpson (1914)
Anodontites (s.s.) trapesialis trapesialis — Haas (1931), Haas (1969)
Anodontites trapesialis — Simone (2006)

Anodon moretonianus Sowerby, 1867

(error for Anodonta mortoniana Lea, 1834; misidentified reference to Anodonta mortoniana Lea, 1834)
‘Lea’ Sowerby, 1867. Conch. Icon. 17: pl. 9, sp. 21, fig. 20.

Glabaris (s.s.) trapesialis var. moretonianus — Simpson (1900)
Anodontites (s.s.) trapesialis var. moretonianus — Simpson (1914)
Anodontites (s.s.) trigona — Ortmann (1921)
Anodontites trapesialis — Simone (1994)

Anodon ciconia Sowerby, 1870

(reference to Anodon ciconia Gould, 1851)
‘Gould’ Sowerby, 1870. Conch. Icon. 17: pl. 29, sp. 115, fig. 115a. [in part]

Glabaris (s.s.) trapesialis var. rioplatensis — Simpson (1900)
Anodonta (Pseudoleila) ciconia — Martens (1900)
Anodontites (s.s.) trapesialis var. rioplatensis — Simpson (1914)
Leila (Pseudoleila) ciconia — Frierson (1927)

Anodon ciconia Sowerby, 1870

(reference to Anodon ciconia Gould, 1851)
‘Gould’ Sowerby, 1870. Conch. Icon. 17: pl. 29, sp. 115, fig. 115b. [in part]

Glabaris (s.s.) umbonatus — Simpson (1900)
Anodontites (s.s.) umbonatus — Simpson (1914)

Anodonta anserina Clessin, 1873

(reference to Anodon anserinus Spix in Wagner, 1827)
‘Spix’ Clessin, 1873. Conchyl. Cab. 9(1): 80, pl. 20, fig. 1.

Anodonta trapezialis Doering, 1875

(error for Anodonta trapesialis Lamarck, 1819; reference to Anodonta trapesialis Lamarck, 1819)
‘Lamarck’ Doering, 1875. Periód. Zool. 2: 46.
Ihering, 1890. Arch. Naturg. 56(1): 147, 157.

Anodontites (s.s.) trapesialis forbesianus — Mansur (1970)
Anodontites trapesialis forbesianus — Ramírez et al. (2003)

Glabaris susannae Ihering, 1893

(reference to Anodon susannae Gray in Griffith & Pidgeon, 1833)
‘Gray’ Ihering, 1893. Arch. Naturg. 59(1): 118.

Anodontites (s.s.) trapesialis forbesianus — Mansur (1970)
Anodontites trapesialis forbesianus — Ramírez et al. (2003)

Anodon auserinus Corsi, 1900

(error for Anodon anserinus Spix in Wagner, 1827)
‘Spix’ Corsi, 1900. Anais Mus. Nac. Montevideo 2: 456.

Anodonta troperziali Corsi, 1900

(error for Anodonta trapesialis Lamarck, 1819)
‘Lamarck’ Corsi, 1900. Anais Mus. Nac. Montevideo 2: 456.

Anodonta trapezialis v. cigneiformis Corsi, 1900

(error for Glabaris trapesialis var. cygneiformis Pilsbry, 1896)
‘Pilsbry’ Corsi, 1900. Anais Mus. Nac. Montevideo 2: 455.

Anodonta troperziali, var. exotica Corsi, 1900

(reference to Anodonta exotica Lamarck, 1819)
‘Lamarck’ Corsi, 1900. Anais Mus. Nac. Montevideo 2: 456, fig. 37.

Anodontites (s.s.) riograndensis — Ortmann (1921)
Anodontites (s.s.) trapesialis forbesianus — Mansur (1970)

Glabaris trapesialis var. cygnaeformis Simpson, 1900

(error for Glabaris trapesialis var. cygneiformis Pilsbry, 1896)
‘Pilsbry’ Simpson, 1900. Proc. U.S. Nat. Mus. 22: 925.
‘Pilsbry’ Simpson, 1914. Descr. Cat. Naiades: 1432.

Anodontites trapesialis — Simone (1994)

Glabaris trapesialis var. cygneyformis Ramírez et al., 2003

(error for Glabaris trapesialis var. cygneiformis Pilsbry, 1896)
‘Pilsbry’ Ramírez et al., 2003. Rev. Biol. Trop. 51: 273.

Anodontites susanae Simone, 2006

(error for Anodon susannae Gray in Griffith & Pidgeon, 1833)
‘Gray’ Simone, 2006. Land. Freshw. Moll. Brazil.: 282.