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), ... Torres et al. (2024), Dai et al. (2025), Chen et al. (2025), FMCS (2025), Cummings et al. (2025)
Anodontites trapesialis trapesialis — Mansur & Valer (1992), Ramírez et al. (2003)

Anodonta trapezialis Blainville, 1825
‘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: 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 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 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 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 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)
— Petit & Coan (2008)

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.

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

Anodonta nicaraguae Philippi, 1849
Philippi, 1849. Z. Malak. 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 Carpenter, 1857
‘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
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 H. Adams, 1866
‘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
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
‘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 Martens, 1868
‘Lamarck’ of Authors.
Martens, 1868. Malak. Blatt. 15: 197.
Pilsbry & Rush, 1896. Nautilus 10: 81.

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

Anodonta gigantea Martens, 1868
‘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
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.

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

Anodon glaucus Sowerby, 1870
‘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 Tate, 1870
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
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.

— Simpson (1914)
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.
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 Simpson, 1900
‘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 Simpson, 1900
‘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
‘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 of Authors, unknown year
‘Küster’ of Authors.

Anodonta exotica Cuvier, 1817
‘Lamarck’ Cuvier, 1817. Règne Animal 2: pl. 90, figs. 1-1a.

Unio (Anodontes) exotica var. A elongata d’Orbigny, 1835
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
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
d’Orbigny, 1835. Mag. Zool. 5(61-62): 39 [as ‘Var. C’].

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

Iridina trapezialis d’Orbigny, 1846
d’Orbigny, 1846. Voyage dans l’Amérique Méridionale 5: 596.

Anodonta esula Gray, 1847
‘Orb.’ Gray, 1847. Proc. Zool. Soc. London 15: 197.

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

Anodon pencillatus Lea, 1852
‘Gray’ Lea, 1852. Synopsis Fam. Naiades: 52.
‘Gray’ Lea, 1870. Synopsis Fam. Naiades: 83.

Anodon blainvilleana Sowerby, 1867
‘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
‘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)
— Haas (1969)
Anodontites trapesialis — Simone (1994)

Anodon ciconia Sowerby, 1870
‘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
‘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
‘Spix’ Clessin, 1873. Conchyl. Cab. 9(1): 80, pl. 20, fig. 1.

Anodonta trapezialis Doering, 1875
‘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
‘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
‘Spix’ Corsi, 1900. Anais Mus. Nac. Montevideo 2: 456.

Anodonta troperziali Corsi, 1900
‘Lamarck’ Corsi, 1900. Anais Mus. Nac. Montevideo 2: 456.

Anodonta trapezialis v. cigneiformis Corsi, 1900
‘Pilsbry’ Corsi, 1900. Anais Mus. Nac. Montevideo 2: 455.

Anodonta troperziali, var. exotica Corsi, 1900
‘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
‘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
‘Pilsbry’ Ramírez et al., 2003. Rev. Biol. Trop. 51: 273.

Anodontites susanae Simone, 2006
‘Gray’ Simone, 2006. Land. Freshw. Moll. Brazil.: 282.