Unio haysianus Lea, 1834
Lea, 1834. Trans. Amer. Phil. Soc. 5 [O. 1]: 35, pl. 3, fig. 7.
Type(s): TOPOTYPE USNM_84613, Nashville, Tenn.

Truncilla (Scalenaria) haysiana — Simpson (1900), Simpson (1914)
Truncilla haysiana — Ortmann (1912), Ortmann (1918)
Dysnomia (Scalenilla) haysiana — Ortmann (1924), Ortmann (1925)
Dysnomia (Penita) haysiana — Frierson (1927), Haas (1969)
Dysnomia haysiana — Stansbery (1970), Burch (1975)
Plagiola (Pilea) haysiana — R.I. Johnson (1978)
Plagiola haysiana — R.I. Johnson (1980)
Epioblasma haysiana — Turgeon et al. (1988), Williams et al. (1993), Bogan (1993), Turgeon et al. (1998), Lydeard et al. (1999), ... Williams et al. (2017), Klymus et al. (2020), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023)
Epioblasma haysianus — Parmalee & Bogan (1998)

Unio sowerbianus Lea, 1834
Lea, 1834. Trans. Amer. Phil. Soc. 5 [O. 1]: 180 [68], pl. 10, fig. 28.

Truncilla (Scalenaria) haysiana — Simpson (1900), Simpson (1914)
Unio soweerbianus [sic] — de Gregorio (1914)
Dysnomia (Penita) haysiana — Frierson (1927), Haas (1969)
Dysnomia haysiana — Burch (1975)
Plagiola (Pilea) haysiana — R.I. Johnson (1978)
Epioblasma haysianus — Parmalee & Bogan (1998)
Epioblasma haysiana — Williams et al. (2008)

Unio sowerbyanus Küster, 1852
‘Lea’ of Authors.
Küster, 1852. Conchyl. Cab. 9(2): 62.
Agassiz, 1852. Arch. Naturg. 18(1): 43.
Reeve, 1864. Conch. Icon. 16: pl. 14, sp. 58.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 520.
Simpson, 1914. Descr. Cat. Naiades: 17.
Frierson, 1927. Check List N. Amer. Naiades: 94.
Haas, 1969. Das Tierreich 88: 483.
Burch, 1975. Freshw. Unio. North Amer.: 173.
R.I. Johnson, 1978. Bull. MCZ 148: 280.
Parmalee & Bogan, 1998. The Freshwater Mussels of Tennessee: 91.
(error for Unio sowerbianus Lea, 1834)

Unio hayesianus Conrad, 1853
‘Lea’ Conrad, 1853. Proc. Acad. Nat. Sci. 6: 250.
(error for Unio haysianus Lea, 1834)

Unio soweerbianus de Gregorio, 1914
‘Lea’ de Gregorio, 1914. Il Nat. Siciliano 2: 55.
(error for Unio sowerbianus Lea, 1834)