Anodon elongatus Swainson, 1823
Swainson, 1823, Zool. Illustr. 3(1): pl. 176.
Swainson, 1840, Treat. Malacol.: 381 [as ‘Lamproscapha elongata’].

Anodon elongatus — Swainson (1823)
Margarita (Anodonta) elongata — Lea (1836), Lea (1838)
Lamproscapha elongata — Swainson (1840)
Anodonta elongata — Hanley (1843)
Margaron (Anodonta) elongata — Lea (1852), Lea (1870)
Anodonta (Lamproscapha) elongata — Adams & Adams (1857)
Glabaris (s.s.) elongatus — Simpson (1900)
Anodontites (s.s.) elongatus — Simpson (1914), Haas (1931), Haas (1969), Pereira et al. (2014), Torres et al. (2018)
Anodontites elongatus — Schade (1965), Ramírez et al. (2003), Simone (2006), Graf & Cummings (2007), Lasso et al. (2009), Bogan (2010), IUCN (2011), Pfeiffer et al. (2019), Mansur et al. (2020)
Anodontites elongata — Whelan et al. (2011), Graf et al. (2015), Bolotov et al. (2016), Lopes-Lima et al. (2017), ..., Wu et al. (2021), Graf & Cummings (2021), Breure et al. (2022), Torres et al. (2024)

Anodonta solidula Deville & Hupé, 1850
Deville & Hupé, 1850, Rev. Mag. Zool. 2: 644, pl. 16, fig. 2.
Hupé, 1857, [in] Castelnau, Anim. Nouv. Rares d’Amer. Sud: 88, pl. 18, fig. 2.
Type(s): FIGURED SYNTYPE MNHN-IM-2000-1787, du Haut Amazone. Upper Amazon River.

Anodonta solidula — Deville & Hupé (1850), Hanley (1856), Hupé (1857), Ramírez et al. (2003)
Margaron (Anodonta) solidula — Lea (1852), Lea (1870)
Anodonta (Lamproscapha) solidula — Adams & Adams (1857)
Anodon solidula — Sowerby (1869)
Glabaris (s.s.) elongatus — Simpson (1900)
Anodontites (s.s.) elongatus — Simpson (1914), Haas (1931), Haas (1969)
Anodontites elongatus — Simone (2006)

Anodonta wheatleyi Lea, 1852
Lea, 1852, Trans. Amer. Phil. Soc. 10 [O. 5]: 287, pl. 26, fig. 49.
Lea, 1852, Proc. Amer. Phil. Soc. 5: 252. [nomen nudum]
Type(s): HOLOTYPE USNM_86723, Amazon River, Pará.

Anodonta wheatleyi — Lea (1852), Hanley (1856), Hupé (1857)
Margaron (Anodonta) wheatleyi — Lea (1852), Lea (1870)
Anodonta (Lamproscapha) wheatleyi — Adams & Adams (1857), H. Adams (1866)
Anodon wheatleyi — Sowerby (1869)
Glabaris (s.s.) elongatus — Simpson (1900)
Anodontites (s.s.) elongatus — Simpson (1914), Haas (1931), Haas (1969)
Anodontites elongatus — Simone (2006)

Anodonta holtonis Lea, 1857
Lea, 1857, Proc. Acad. Nat. Sci. 9: 85.
Lea, 1857, Jour. Acad. Nat. Sci. 3 [O. 6]: 316 [36], pl. 32, fig. 31.
Type(s): HOLOTYPE USNM_86519, near Cauca River, Prov. Popayán, New Grenada.

Anodonta holtonis — Lea (1857), B.H. Wright (1888)
Anodon haltonis — Sowerby (1870)
Margaron (Anodonta) holtonis — Lea (1870)
Glabaris (s.s.) holtonis — Simpson (1900)
Anodontites (s.s.) holtonis — Simpson (1914)
Anodontites (s.s.) elongatus — Haas (1931), Haas (1969)
Anodontites elongatus — Simone (2006)

Anodon dactylus Sowerby, 1867
Sowerby, 1867, Conch. Icon. 17: pl. 19, sp. 75.

Anodon dactylus — Sowerby (1867)
Margaron (Anodonta) dactylus — Lea (1870)
Glabaris (s.s.) elongatus — Simpson (1900)
Anodontites (s.s.) elongatus — Simpson (1914), Haas (1931), Haas (1969)
Anodontites elongatus — Simone (2006)

Anodon amethystus Sowerby, 1869
Sowerby, 1869, Conch. Icon. 17: pl. 24, sp. 95, fig. 95a-b.
Sowerby, 1870, Conch. Icon. 17: index [as ‘wheatleyi’].

Anodon amethystus — Sowerby (1869)
Anodon wheatleyi — Sowerby (1869)
Glabaris (s.s.) elongatus — Simpson (1900)
Anodontites (s.s.) elongatus — Simpson (1914), Haas (1931), Haas (1969)
Anodontites elongatus — Simone (2006)

Anodon haltonis Sowerby, 1870
‘Lea’ Sowerby, 1870, Conch. Icon. 17: pl. 36, sp. 147.
(error for Anodonta holtonis Lea, 1857)

Anodon haltonis — Sowerby (1870)
Glabaris (s.s.) holtonis — Simpson (1900)

Anodonta (Glabaris) hidalgoi Germain, 1908
Germain, 1908, Bull. Mus. Hist. Nat. 14: 64.
Type(s): POSSIBLE SYNTYPES MNHN_MP_0401, Equateur.

Anodonta (Glabaris) hidalgoi — Germain (1908)
Anodontites (s.s.) hidalgoi — Simpson (1914)
Anodontites (s.s.) elongatus — Haas (1969)
Anodontites elongata — Breure et al. (2022)

Anodontites dalli F. Baker, 1913
F. Baker, 1913, Proc. Acad. Nat. Sci. 65: 667, pl. 27, figs. 1-2.
Type(s): HOLOTYPE (MONOTYPY) ANSP_109369, Island of Mexiana, Brazil.

Anodontites dalli — F. Baker (1913)
Anodontites (s.s.) trigonus trigonus — Haas (1931), Haas (1969)
Anodontites (Styganodon) dalli — Morretes (1949)
Anodontites trigonus — Simone (2006)

Anodontites schadei Marshall, 1934
Marshall, 1934, J. Washington Acad. Sci. 24(2): 80, figs. 4-6.
Type(s): HOLOTYPE USNM_424732, Aroja, Tubicuary River, Paraguay.

Anodontites schadei — Marshall (1934), Schade (1965)
Anodontites (s.s.) patagonicus patagonicus — Haas (1969)
Anodontites elongatus — Simone (2006)

Taxonomic History (since 1900)

Glabaris (s.s.) elongatus — Simpson (1900)
Glabaris (s.s.) holtonis — Simpson (1900)
Anodonta (Glabaris) hidalgoi — Germain (1908)
Anodontites dalli — F. Baker (1913)
Anodontites (s.s.) elongatus — Simpson (1914), Haas (1931), Haas (1969), Pereira et al. (2014), Torres et al. (2018)
Anodontites (s.s.) holtonis — Simpson (1914)
Anodontites (s.s.) hidalgoi — Simpson (1914)
Anodontites (s.s.) trigonus trigonus — Haas (1931), Haas (1969)
Anodontites schadei — Marshall (1934), Schade (1965)
Anodontites (Styganodon) dalli — Morretes (1949)
Anodontites elongatus — Schade (1965), Ramírez et al. (2003), Simone (2006), Graf & Cummings (2007), Lasso et al. (2009), Bogan (2010), IUCN (2011), Pfeiffer et al. (2019), Mansur et al. (2020)
Anodontites (s.s.) patagonicus patagonicus — Haas (1969)
Anodonta solidula — Ramírez et al. (2003)
Anodontites trigonus — Simone (2006)
Anodontites elongata — Whelan et al. (2011), Graf et al. (2015), Bolotov et al. (2016), Lopes-Lima et al. (2017), ..., Wu et al. (2021), Graf & Cummings (2021), Breure et al. (2022), Torres et al. (2024)