Unio dromas Lea, 1834
Lea, 1834. Trans. Amer. Phil. Soc. 5 [O. 1]: 70 [182], pl. 10, fig. 29.
Type(s): HOLOTYPE USNM_25852, Tennessee.

Dromus dromus [sic] — Simpson (1900), Stansbery (1970), Burch (1975), Serb (2006)
Dromus dromas — Ortmann (1912), Simpson (1914), Ortmann (1918), Ortmann (1924), Ortmann (1925), ... Klymus et al. (2020), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025)
— de Gregorio (1914)
Conchodromus dromus [sic] — Haas (1930), Haas (1969)
Conchodromus dromas — Thiele (1934), Haas (1969)
Dromus dromas dromas — ITIS (2012)

Unio caperatus Lea, 1845
Lea, 1845. Proc. Amer. Phil. Soc. 4: 164.
Lea, 1848. Trans. Amer. Phil. Soc. 10 [O. 4]: 75, pl. 5, fig. 14.
Type(s): FIGURED SYNTYPE USNM_84305, Clinch R., E. Tenn.

Dromus caperatus — Simpson (1900), Simpson (1914)
Dromus dromas caperatus — Ortmann (1918), Ortmann (1924), Ortmann (1925), ITIS (2012)
Dromus dromas-caperatus — Frierson (1927)
Conchodromus dromas — Haas (1969)
Dromus dromas — R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008)

Unio abacoides Haldeman, 1846
Haldeman, 1846. Proc. Acad. Nat. Sci. 3(3): 75.
Haldeman, 1846. Amer. J. Sci. 52(5): 274.
Type(s): HOLOTYPE ANSP_41153, [no locality available - North America].

Dromus caperatus — Simpson (1900), Simpson (1914)
Dromus dromas-caperatus — Frierson (1927)
Conchodromus dromas — Haas (1969)
Dromus dromas — Parmalee & Bogan (1998), Williams et al. (2008)

Dromus dromus Simpson, 1900
‘Lea’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 615.
Haas, 1930. Senckenbergiana 12(6): 317.
Haas, 1969. Treatise on Invert. Paleo: N452.
Stansbery, 1970. Malacologia 10(1): 18.
Millard, 2001. Class. Moll. (3): 1066.
Serb, 2006. J. Moll. Studies 72: 427.
(error for Unio dromas Lea, 1834)

Dromus dromas — Simpson (1914)
Conchodromus dromas — Haas (1969)