Unio delumbis Conrad, 1834
Conrad, 1834. New Fresh-Water Shells: 35, pl. 5, fig. 3.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 248.

Lampsilis (s.s.) delumbis — Simpson (1900), Simpson (1914)
Lampsilis (Ligumia) delumbis — Frierson (1927)
Ligumia delumbis — Haas (1969)
Villosa delumbis — R.I. Johnson (1970), Burch (1975), Davis & Fuller (1981), Kat (1983), Turgeon et al. (1988), ... Williams et al. (2017), Watters (2018), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023)

Unio ogeecheensis Conrad, 1849
Conrad, 1849. Ann. Mag. Nat. Hist. 4: 300.
Conrad, 1850. Jour. Acad. Nat. Sci. 1: 275, pl. 37, figs. 3-4.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 254.
Type(s): LECTOTYPE MCZ_146971 (by R.I. Johnson, 1956: 126), Ogeechee River, Georgia.

Lampsilis (sec. Eurynia) ogeecheensis — Simpson (1900)
Lampsilis (Eurynia) ogeecheensis — Simpson (1914)
— de Gregorio (1914)
Lampsilis (Ligumia) ogeecheensis — Frierson (1927)
Ligumia ogeecheensis — Haas (1969)
Villosa delumbis — R.I. Johnson (1970), Burch (1975), Watters (2018)

Unio concavus Lea, 1852
Lea, 1852. Trans. Amer. Phil. Soc. 10 [O. 5]: 260, pl. 15, fig. 11.
Lea, 1852. Proc. Amer. Phil. Soc. 5: 251. [nomen nudum]
Type(s): HOLOTYPE USNM_85154, Abbeville District, S Carolina.

Lampsilis (sec. Eurynia) sudus — Simpson (1900)
Lampsilis (Eurynia) suda — Simpson (1914)
Lampsilis (Ligumia) ogeecheensis — Frierson (1927)
Ligumia ogeecheensis — Haas (1969)
Villosa delumbis — R.I. Johnson (1970), Burch (1975), Watters (2018)

Unio genuinus Lea, 1868
Lea, 1868. Proc. Acad. Nat. Sci. 20: 161.
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 305 [64], pl. 46, fig. 117.
Type(s): FIGURED SYNTYPE USNM_85123, Bissels Pond, N.C.

Lampsilis (sec. Eurynia) concestator — Simpson (1900)
Lampsilis (Eurynia) concestator — Simpson (1914)
Lampsilis (Ligumia) lienosa — Frierson (1927)
Villosa lienosus — Clench & Turner (1956)
Ligumia lienosa — Haas (1969)
Villosa delumbis — R.I. Johnson (1970), Burch (1975), Watters (2018)

Unio tenerus Simpson, 1892
‘Ravenel’ Simpson, 1892. Proc. U.S. Nat. Mus. 15(911): 416, pl. 58, figs. 5, 8.
Type(s): FIGURED SYNTYPE USNM_85032, Savannah R., Georgia.

Lampsilis (sec. Eurynia) ogeecheensis — Simpson (1900)
Lampsilis (Eurynia) ogeecheensis — Simpson (1914)
Villosa delumbis — Watters (2018)

Unio tenerus Ravenel, 1834
Ravenel, 1834. Cat. Rec. Shells: 7. [nomen nudum]

Lampsilis (sec. Eurynia) modioliformis — Simpson (1900)
Lampsilis (Eurynia) modioliformis — Simpson (1914)
Villosa delumbis — R.I. Johnson (1970), Burch (1975)

Margarita (Unio) tenerus Lea, 1836
‘Ravenel’ Lea, 1836. Synopsis Fam. Naiades: 39.
‘Rav.’ Lea, 1838. Synopsis Fam. Naiades: 25.
‘Rav.’ Lea, 1852. Synopsis Fam. Naiades: 39.
‘Rav. Han.’ Lea, 1870. Synopsis Fam. Naiades: 44.
(reference to Unio tenerus Simpson, 1892)

Lampsilis (sec. Eurynia) modioliformis — Simpson (1900)
Lampsilis (Eurynia) modioliformis — Simpson (1914)
Lampsilis (Ligumia) radiata-tenebrosa — Frierson (1927)
Ligumia radiata tenebrosa — Haas (1969)
Villosa delumbis — Watters (2018)

Unio carolinensis Lea, 1836
“Prof. Ravenel’s Letter” Lea, 1836. Synopsis Fam. Naiades: 39.
“Professor Ravenel’s Letter” Lea, 1838. Trans. Amer. Phil. Soc. 6 [O. 2]: 5.
(intro'd as syn of Unio vaughanianus Lea, 1838)

Unio ogeeehensis de Gregorio, 1914
‘Conrad’ de Gregorio, 1914. Il Nat. Siciliano 2: 44.
(error for Unio ogeecheensis Conrad, 1849)