Unio peraeformis Lea, 1860
Lea, 1860. Proc. Acad. Nat. Sci. 12: 90 [as ‘peræformis’].
Lea, 1863. Jour. Acad. Nat. Sci. 5 [O. 10]: 384 [20], pl. 43, fig. 292 [as ‘peræformis’].
Type(s): HOLOTYPE USNM_85774, Uruguay R., S. Amercia.

Diplodon (Cyclomya s.s.) peraeformis — Simpson (1900), Simpson (1914)
Unio peræformis — Corsi (1900)
Diplodon (Cyclomya) paranensis funebralis — Haas (1931)
Diplodon (Rhipidodonta) charruanus — Bonetto (1964), Bonetto (1965), Bonetto & Mansur (1970)
Diplodon (Rhipidodonta) funebralis — Figueiras (1965)
Diplodon peraeformis — Parodiz (1968), Mansur (1970), Graf & Cummings (2021)
Diplodon (Rhipidodonta) paranensis funebralis — Haas (1969)
Rhipidodonta charruana — Simone (2006)
Diplodon (Rhipidodonta) peraeformis — Pereira et al. (2014), Torres et al. (2018)
Rhipidodonta peraeformis — Mansur et al. (2020)

Unio prunoides Lea, 1868
Lea, 1868. Proc. Acad. Nat. Sci. 20: 150.
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 323, pl. 53, fig. 136.
Type(s): HOLOTYPE (MONOTYPY) ANSP_41791, So. America.

Diplodon (s.s.) prunoides — Simpson (1900), Simpson (1914)
Diplodon (Cyclomya) paranensis funebralis — Haas (1931)
Diplodon (Rhipidodonta) charruanus — Bonetto (1964), Bonetto (1965), Figueiras (1965), Bonetto & Mansur (1970)
Diplodon peraeformis — Parodiz (1968), Mansur (1970)
Diplodon (Rhipidodonta) paranensis funebralis — Haas (1969)
Rhipidodonta funebralis — Simone (2006)

Unio paraeformis Figueiras, 1965
‘Lea’ of Authors.
Figueiras, 1965. Comm. Soc. Malac. Uruguay 1(8): 239.
Simone, 2006. Land. Freshw. Moll. Brazil.: 267.
(error for Unio peraeformis Lea, 1860)

Rhipidodonta pruinoides Simone, 2006
‘Lea’ Simone, 2006. Land. Freshw. Moll. Brazil.: 267.
(error for Unio prunoides Lea, 1868)