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), ... Dai et al. (2025), Chen et al. (2025), FMCS (2025), Cummings et al. (2025), Campbell & Lydeard (2026)
Anodontites trapesialis trapesialis — Mansur & Valer (1992), Ramírez et al. (2003)

Anodonta trapezialis ‘Lamarck’ of Authors

‘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.
(error for Anodonta trapesialis Lamarck, 1819)

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

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

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.

Glabaris nicaragua — Simpson (1900)
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

‘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.
(reference to Anodon ciconia Gould, 1851)

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

Anodonta burroughiana Chenu, 1858

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

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

‘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’].
(misidentified reference to Anodonta gigantea Lea, 1838)

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

Anodon areolatus Sowerby, 1867

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

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

‘Gray’ Sowerby, 1867. Conch. Icon. 17: pl. 16, sp. 57.
(homonym of Anodonta exotica Lamarck, 1819; renamed Leila grayana Frierson, 1922)
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

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

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

Anodonta gigantea ‘Spix’ of Authors

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

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

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

Glabaris wallisi — Simpson (1900)
Anodontites wallisi — Simpson (1914)
Anodontites (s.s.) trapesialis glaucus — Haas (1931), Haas (1969)

Anodon glaucus ‘Valenciennes’ of Authors

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

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

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.
(error for Anodonta nicaraguae Philippi, 1849)

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

Crosse & Fischer, 1884. J. de Conch. 31: 219.
(intro'd as intra-sp. of Anodonta glauca Valenciennes, 1827)
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

Pilsbry, 1896. Proc. Acad. Nat. Sci. 48: 563, pl. 26, figs. 5-6.
(intro'd as intra-sp. of Anodonta trapesialis Lamarck, 1819)
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

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

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

Anodonta jewittii ‘Lea’ of Authors

‘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.
(error for Anodonta jewettii Lea, 1868)

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

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

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

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

Anodonta exotica Cuvier, 1817

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

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

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

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

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

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

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

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

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

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

Iridina trapezialis d’Orbigny, 1846

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

Anodonta esula Gray, 1847

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

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

Anodon pencillatus Lea, 1852

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

Anodon blainvilleana Sowerby, 1867

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

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

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

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

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

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

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

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

Anodonta anserina Clessin, 1873

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

Anodonta trapezialis Doering, 1875

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

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

Glabaris susannae Ihering, 1893

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

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

Anodon auserinus Corsi, 1900

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

Anodonta troperziali Corsi, 1900

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

Anodonta trapezialis v. cigneiformis Corsi, 1900

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

Anodonta troperziali, var. exotica Corsi, 1900

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

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

Glabaris trapesialis var. cygnaeformis Simpson, 1900

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

Anodontites trapesialis — Simone (1994)

Glabaris trapesialis var. cygneyformis Ramírez et al., 2003

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

Anodontites susanae Simone, 2006

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