species Castalia cordata Swainson, 1840: synonymy

Prisodon truncatus Schumacher, 1817

Schumacher, 1817. Essai. Nouv. Syst.: 139. [nomen dubium]

Tetraplodon ambiguus — Simpson (1900), Haas (1916)
Tetraplodon (Group of T. ambiguus) ambiguus — Simpson (1914)
Castalia (s.s.) ambigua ambigua — Modell (1950)
Castalia ambigua — Simone (2006)
Castalia cordata — Prié et al. (2026)

Castalia quadrilatera d’Orbigny, 1835

d’Orbigny, 1835. Mag. Zool. 5(61-62): 42.
d’Orbigny, 1846. Voyage dans l’Amérique Méridionale 5(3): 599, pl. 73.
LECTOTYPE BMNH_1854.9.4.2 (by R.I. Johnson, 1971: 92), Río San Miguel (Amazon–Madeira–Mamoré–Guaporé drainage), Guarayos, Santa Cruz Department, Bolivia. [L = -15.8930, -63.1890].

Tetraplodon quadrilaterum — Simpson (1900)
Tetraplodon quadrilaterus — Ihering (1910)
Castalia quadrilatera — F. Baker (1913), Haas (1931), Haas (1969), Quintana (1982)
Tetraplodon (Group of T. ambiguus) quadrilaterus — Simpson (1914)
Castalia (s.s.) quadrilatera quadrilatera — Modell (1950)
Castalia ambigua ambigua — Bonetto (1965), Ramírez et al. (2003)
Castalia ambigua — Simone (2006), Nagel (2025)
Castalia cordata — Prié et al. (2026)

Castalia cordata Swainson, 1840

Humphrey, 1797. Mus. Col.: ??. [non-binomial]
‘Humphrey’ Swainson, 1840. Treat. Malacol.: 284, 379, footnote.
‘Humphrey’ Adams & Adams, 1857. Gen. Rec. Moll. 2(31-32): 509.
Adams & Adams, 1858. Gen. Rec. Moll. 3: pl. 120, figs. 2-2a.
HOLOTYPE BMNH_1965197, British Guayana.

Tetraplodon quadrilaterum — Simpson (1900)
Tetraplodon cordatus — Ihering (1910)
Tetraplodon (Group of T. ambiguus) cordatus — Simpson (1914)
Castalia (s.s.) quadrilatera retusa — Modell (1950)
Castalia cordata — Haas (1969), Pereira et al. (2014), Mansur et al. (2020), Graf & Cummings (2021), Prié et al. (2026)
Castalia multisulcata — Ramírez et al. (2003)

Castalia retusa Hupé, 1857

Hupé, 1857. [in] Castelnau, Anim. Nouv. Rares d’Amer. Sud: 75, pl. 14, fig. 2.
POSSIBLE SYNTYPE MNHN-IM-2000-29823, Guyane.

Tetraplodon retusus — Simpson (1900), Ihering (1910)
Tetraplodon (Group of T. ambiguus) retusus — Simpson (1914)
Castalia retusa — Haas (1931), Haas (1969), Mansur (1991)
Castalia (s.s.) quadrilatera retusa — Modell (1950)
Castalia ambigua ambigua — Bonetto (1965), Ramírez et al. (2003)
Castalia ambigua — Simone (2006)
Castalia cordata — Prié et al. (2026)

Castalia quadrilatera Ihering, 1893

(reference to Castalia quadrilatera d’Orbigny, 1835)
Ihering, 1893. Arch. Naturg. 59(1): 89.

Castalia inflata — Ortmann (1921)

Castalia latiquadrata Sowerby, 1869

(error for Castalia lateriquadrata Sowerby, 1869)
‘d’Orbigny’ Sowerby, 1869. Conch. Icon. 17: index.

Tetraplodon quadrilaterum — Simpson (1900)
Tetraplodon (Group of T. ambiguus) quadrilaterus — Simpson (1914)
Castalia latiquadrata — Haas (1931)
Castalia (s.s.) quadrilatera quadrilatera — Modell (1950)
Castalia ambigua ambigua — Bonetto (1965)

Castalia lateriquadrata Sowerby, 1869

(error for Castalia quadrilatera d’Orbigny, 1835)
‘d’Orbigny’ Sowerby, 1869. Conch. Icon. 17: pl. 2, sp. 10.

Tetraplodon quadrilaterum — Simpson (1900)
Tetraplodon lateriquadratus — Ihering (1910)
Castalia lateriquadrata — Haas (1949)
Castalia (s.s.) quadrilatera quadrilatera — Modell (1950)
Castalia quadrilatera — Haas (1969), Quintana (1982)
Castalia ambigua ambigua — Ramírez et al. (2003)
Castalia ambigua — Simone (2006)

Castalia lateriiquadrata Haas, 1969

(error for Castalia lateriquadrata Sowerby, 1869)
‘Sowerby’ Haas, 1969. Das Tierreich 88: 535.

Castalia cuadrilatera Ramírez et al., 2003

(error for Castalia quadrilatera d’Orbigny, 1835)
‘d’Orbigny’ Ramírez et al., 2003. Rev. Biol. Trop. 51: 273.

Castalia ambigua — Simone (2006)

Castalia lateriquacrata Simone, 2006

(error for Castalia lateriquadrata Sowerby, 1869)
‘auctt.’ Simone, 2006. Land. Freshw. Moll. Brazil.: 252.

Castalia ambigua — Simone (2006)