Unio tenebricus Lea, 1857
Lea, 1857. Proc. Acad. Nat. Sci. 9: 171.
Lea, 1858. Jour. Acad. Nat. Sci. 4 [O. 6]: 83, pl. 17, fig. 63.
Type(s): HOLOTYPE USNM_85143, Etowah R., Georgia.

Lampsilis (sec. Eurynia) vanuxemensis — Simpson (1900)
Lampsilis (Eurynia) vanuxemensis — Simpson (1914)
Eurynia (Micromya) vanuxemensis — Ortmann (1918)
Lampsilis (Ligumia) vanuxemensis — Frierson (1927)
Ligumia vanuxemensis — Haas (1969)
Villosa vanuxemensis umbrans — Burch (1975)
Villosa vanuxemensis — Parmalee & Bogan (1998)
Villosa umbrans — Williams et al. (2008)
Leaunio umbrans — Watters (2018)

Unio umbrans Lea, 1857
Lea, 1857. Proc. Acad. Nat. Sci. 9: 104.
Lea, 1858. Jour. Acad. Nat. Sci. 4 [O. 6]: 72, pl. 13, fig. 53.
(new name for Unio umbrosus Lea, 1857)
Type(s): HOLOTYPE USNM_85121, Othcalooga Creek, Georgia.

Lampsilis (sec. Eurynia) vanuxemensis — Simpson (1900)
Lampsilis (Eurynia) vanuxemensis — Simpson (1914)
Eurynia (Micromya) vanuxemensis — Ortmann (1918)
Micromya vanuxemensis umbrans — Ortmann (1925)
Lampsilis (Ligumia) vanuxemensis — Frierson (1927)
Ligumia vanuxemensis — Haas (1969)
Villosa vanuxemensis umbrans — Burch (1975), Turgeon et al. (1988), Williams et al. (1993), Turgeon et al. (1998), Lydeard et al. (1999), ITIS (2012)
Villosa umbrans — Williams et al. (2008), Bogan (2010), Haag (2012), Williams et al. (2017)
Leaunio umbrans — Watters (2018), Graf & Cummings (2021), Bieler (2021), FMCS (2021), Hopper et al. (2023)

Unio umbrosus Lea, 1857
Lea, 1857. Proc. Acad. Nat. Sci. 9: 32.
(homonym of Unio umbrosus Lea, 1856; renamed Unio umbrans Lea, 1857)
Type(s): HOLOTYPE USNM_84848, Medellin R., Mexico.

Lampsilis (sec. Eurynia) vanuxemensis — Simpson (1900)
Lampsilis (Eurynia) vanuxemensis — Simpson (1914)
Eurynia (Micromya) vanuxemensis — Ortmann (1918)
Ligumia vanuxemensis — Haas (1969)
Villosa umbrans — Williams et al. (2008)
Leaunio umbrans — Watters (2018), Bieler (2021)

Unio fabaceus Lea, 1861
Lea, 1861. Proc. Acad. Nat. Sci. 13: 38.
Lea, 1862. Jour. Acad. Nat. Sci. 5 [O. 8]: 90 [94], pl. 13, fig. 238.
Type(s): HOLOTYPE USNM_85165, Oostanula R., Ga.

Lampsilis (sec. Eurynia) vanuxemensis — Simpson (1900)
Lampsilis (Eurynia) vanuxemensis — Simpson (1914)
Eurynia (Micromya) vanuxemensis — Ortmann (1918)
Lampsilis (Ligumia) fabacea — Frierson (1927)
Ligumia fabacea — Haas (1969)
Villosa vanuxemensis umbrans — Burch (1975)
Villosa vanuxemensis — Parmalee & Bogan (1998)
Villosa umbrans — Williams et al. (2008)
Leaunio umbrans — Watters (2018)

Unio porphyreus Lea, 1861
Lea, 1861. Proc. Acad. Nat. Sci. 13: 60.
Lea, 1862. Jour. Acad. Nat. Sci. 5 [O. 8]: 80 [84] , pl. 10, fig. 228.
Type(s): HOLOTYPE USNM_84851, Coosa R., Alabama.

Lampsilis (sec. Eurynia) porphyreus — Simpson (1900)
Lampsilis (Eurynia) porphyrea — Simpson (1914)
Lampsilis (Ligumia) lienosa — Frierson (1927)
Villosa lienosus — Clench & Turner (1956)
Ligumia lienosa — Haas (1969)
Villosa lienosa — Burch (1975), Parmalee & Bogan (1998), Watters et al. (2009)
Villosa umbrans — Williams et al. (2008)
Leaunio umbrans — Watters (2018)

Unio proprius Lea, 1865
Lea, 1865. Proc. Acad. Nat. Sci. 17: 89.
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 256 [16], pl. 31, fig. 70.
Type(s): HOLOTYPE USNM_85141, Lafayette, Georgia.

Lampsilis (sec. Eurynia) proprius — Simpson (1900)
Lampsilis (Eurynia) propria — Simpson (1914)
Lampsilis (Ligumia) propia [sic] — Frierson (1927)
Ligumia propria — Haas (1969)
Villosa vanuxemensis umbrans — Burch (1975)
Villosa umbrans — Williams et al. (2008)
Leaunio umbrans — Watters (2018)

Lampsilis propia Frierson, 1927
‘Lea’ Frierson, 1927. Check List N. Amer. Naiades: 75.
(error for Unio proprius Lea, 1865)