Unio wymanii Lea, 1860
Lea, 1860. Proc. Acad. Nat. Sci. 12: 90.
Lea, 1863. Jour. Acad. Nat. Sci. 5 [O. 10]: 381, pl. 42, fig. 289.
Type(s): HOLOTYPE USNM_84378, Uruguay River.

Diplodon (s.s.) wymanii — Simpson (1900), Simpson (1914), Pereira et al. (2014), Torres et al. (2018)
Diplodon (s.s.) lacteolus — Ortmann (1921)
Diplodon delodontus wymanii — Haas (1930), Quintana (1982)
Diplodon (s.s.) delodontus wymanii — Bonetto (1964), Bonetto (1965), Figueiras (1965), Haas (1969)
Diplodon delodontus wymani — Parodiz (1968), Mansur (1970)
Diplodon (s.s.) delodontus wimanii [sic] — Bonetto & Mansur (1970)
Diplodon wymanii — Simone (2006), Graf & Cummings (2007), Bogan (2010), Mansur et al. (2020), Graf & Cummings (2021), Torres et al. (2024)
Diplodon (s.s.) delodontus waymanii [sic] — Rumi et al. (2008)

Unio nitidulus Küster, 1861
‘Ziegler, in lit.’ Küster, 1861. Conchyl. Cab. 9(2): 226, pl. 76, fig. 6.

Diplodon (s.s.) peculiaris — Simpson (1900), Simpson (1914)
— Parodiz (1968), Haas (1969)
Diplodon wymanii — Simone (2006)

Unio peculiaris Lea, 1866
Lea, 1866. Proc. Acad. Nat. Sci. 18: 33.
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 265, pl. 34, fig. 80.
Type(s): HOLOTYPE USNM_85190, S. America.

Diplodon (s.s.) peculiaris — Simpson (1900), Simpson (1914)
Diplodon wheatleyanus — Haas (1930)
Schleschiella burroughiana burroughiana — Modell (1950)
Diplodon (s.s.) delodontus wymanii — Bonetto (1965), Figueiras (1965)
Diplodon delodontus X uruguayensis — Parodiz (1968)
Diplodon (s.s.) wheatleyanus — Haas (1969)
Diplodon (s.s.) delodontus wimanii [sic] — Bonetto & Mansur (1970)
Diplodon wymanii — Simone (2006)

Diplodon felipponei Marshall, 1917
Marshall, 1917. Proc. U.S. Nat. Mus. 53(2209): 381, pl. 50, figs. 1-3; pl. 51, fig. 1.
Type(s): HOLOTYPE (ORIG. DESIG.) USNM_322391, Maldonado, Uruguay.

Diplodon felipponei — Marshall (1917)
Diplodon (Cyclomya) paranensis funebralis — Haas (1931)
Diplodon delodonta delodonta — Bonetto (1954)
Diplodon (s.s.) delodontus wymanii — Bonetto (1965), Figueiras (1965)
Diplodon delodontus wymani — Parodiz (1968), Mansur (1970)
Diplodon (Rhipidodonta) paranensis funebralis — Haas (1969)
Diplodon (s.s.) delodontus wimanii [sic] — Bonetto & Mansur (1970)
Diplodon wymanii — Simone (2006)

Diplodon wimani Bertoni, 1925
‘Lea’ Bertoni, 1925. Rev. Soc. Cient. del Paraguay 2(1): ??.
Bonetto, 1954. Publ. Tec., Prov. Santa Fe Secret. Argri., Ganad. e Indust. (62): 41.
Bonetto & Mansur, 1970. Acta Zool. Lilloana 27: 249.
(error for Unio wymanii Lea, 1860)

Diplodon delodontus wymani — Mansur (1970)
Diplodon delodontus wymanii — Quintana (1982)
Diplodon wymanii — Simone (2006)

Diplodon delodontus waymanii Rumi et al., 2008
Rumi et al., 2008. Rev. Biol. Trop. 56(1): 84.
(error for Unio wymanii Lea, 1860)