Unio oviformis Conrad, 1834
Conrad, 1834, New Fresh-Water Shells: 46, pl. 3, fig. 6.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 254.

Unio oviformis — Conrad (1834), Ferussac (1835), Conrad (1853)
Margaron (Unio) oviformis — Lea (1852), Lea (1870)
Unio (Lampsilis) oviformis — Adams & Adams (1857)
Pleurobema (s.s.) oviformis — Simpson (1900), Frierson (1927)
Pleurobema (s.s.) oviforme — Simpson (1914)
Pleurobema oviforme — Ortmann (1918), Ortmann (1924), Ortmann (1925), Haas (1969), Burch (1975), Turgeon et al. (1988), Williams et al. (1993), IUCN (1996), Parmalee & Bogan (1998), Turgeon et al. (1998), Lydeard et al. (1999), Bogan (2002), Cicerello & Schuster (2003), Jones et al. (2005), Campbell et al. (2005), Graf & Cummings (2007), Burdick & White (2007), Williams et al. (2008), Campbell et al. (2008), Cummings & Graf (2010), Bogan (2010), Haag (2012), Burlakova et al. (2012), ITIS (2012), Campbell & Lydeard (2012), Jones (2015), Williams et al. (2017), Perkins et al. (2017), Inoue et al. (2018), Teiga-Teixeira et al. (2020), Klymus et al. (2020)
Pleurobema oviformis — R.I. Johnson (1980), Lopes-Lima et al. (2019)

Unio ravenelianus Lea, 1834
Lea, 1834, Trans. Amer. Phil. Soc. 5 [O. 1]: 32 [144], pl. 3, fig. 5.
(renamed Unio rudis Conrad, 1837)
Type(s): HOLOTYPE USNM_84783, French Broad R., near Ashville, N. Carolina.

Unio ravenelianus — Lea (1834), Jay (1835), Ferussac (1835), Hanley (1843), Küster (1862), Reeve (1864), Lewis (1871)
Margarita (Unio) ravenelianus — Lea (1836)
Unio rudis — Conrad (1837), Conrad (1853)
Margaron (Unio) ravenelianus — Lea (1852), Lea (1870)
Unio (Lampsilis) ravenelianus — Adams & Adams (1857)
Pleurobema (s.s.) raveneliana — Simpson (1900)
Pleurobema (s.s.) ravenelianum — Simpson (1914)
Pleurobema oviforme — Ortmann (1918), Parmalee & Bogan (1998), Williams et al. (2008)
Quadrula (Pleuronaia) raveneliana — Frierson (1927), Haas (1969)

Unio argenteus Lea, 1841
Lea, 1841, Proc. Amer. Phil. Soc. 2: 82.
Lea, 1842, Trans. Amer. Phil. Soc. 8 [O. 3]: 242 [80], pl. 25, fig. 57.
Type(s): HOLOTYPE USNM_84778, Holston R., Tenn.

Unio argenteus — Lea (1841), Conrad (1853), Küster (1861), Sowerby (1866), Lewis (1871), Lewis (1872)
Margaron (Unio) argenteus — Lea (1852), Lea (1870)
Unio (Lampsilis) argenteus — Adams & Adams (1857)
Unio (sec. Lampsilis) argenteus — Paetel (1890)
Pleurobema (s.s.) argentea — Simpson (1900)
Pleurobema (s.s.) argenteum — Simpson (1914)
Pleurobema oviforme argenteum — Ortmann (1918), Ortmann (1924), Ortmann (1925)
Quadrula (Pleuronaia) argentea — Frierson (1927), Haas (1969)
Pleurobema oviforme — Burch (1975), Parmalee & Bogan (1998)
Pleurobema oviformis — R.I. Johnson (1980)

Unio mundus Lea, 1857
Lea, 1857, Proc. Acad. Nat. Sci. 9: 83.
Lea, 1866, Jour. Acad. Nat. Sci. 6 [O. 11]: 40 [44], pl. 14, fig. 38.
Type(s): HOLOTYPE USNM_84767, Tuscumbia, Ala.

Unio mundus — Lea (1857), Reeve (1864), Lea (1866)
Margaron (Unio) mundus — Lea (1870)
Pleurobema (s.s.) holstonensis — Simpson (1900)
Pleurobema (s.s.) holstonense — Simpson (1914)
Pleurobema oviforme holstonense — Ortmann (1918)
Quadrula (Pleuronaia) munda — Frierson (1927), Haas (1969)
Pleurobema oviforme — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)

Unio tesserulae Lea, 1862
Lea, 1862, Proc. Acad. Nat. Sci. 13: 392 [as ‘tesserulæ’].
Lea, 1866, Jour. Acad. Nat. Sci. 6 [O. 11]: 40 [44], pl. 15, fig. 39 [as ‘tesserulæ’].
Type(s): HOLOTYPE USNM_84426, Nolachucky R., Tenn.

Unio tesserulae — Lea (1862)
Unio tesserulæ — Lea (1866), Lewis (1871)
Margaron (Unio) tesserulæ — Lea (1870)
Pleurobema (s.s.) tesserulae — Simpson (1900), Simpson (1914)
Pleurobema oviforme holstonense — Ortmann (1918)
Quadrula (Pleuronaia) tesserulae — Frierson (1927), Haas (1969)
Pleurobema oviforme — Parmalee & Bogan (1998), Williams et al. (2008)

Unio striatissimus J.G. Anthony, 1865
J.G. Anthony, 1865, Amer. J. Conch. 1(2): 156, pl. 12, fig. 1.

Unio striatissimus — J.G. Anthony (1865), Sowerby (1868)
Margaron (Unio) estabrookianus — Lea (1870)
Pleurobema (s.s.) estabrookiana — Simpson (1900)
Pleurobema (s.s.) estabrookianum — Simpson (1914)
Pleurobema oviforme argenteum — Ortmann (1918)
Quadrula (Pleuronaia) striatissima — Frierson (1927), Haas (1969)
Fusconaia barnesiana — Parmalee & Bogan (1998)
Pleurobema oviforme — Parmalee & Bogan (1998), Williams et al. (2008)
Pleuronaia barnesiana — Williams et al. (2008)

Unio rudis Conrad, 1837
Conrad, 1837, Monogr. Fam. Unionidae 1(8): 76, pl. 43, fig. 1.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 257.
(new name for Unio ravenelianus Lea, 1834)

Unio rudis — Conrad (1837), Conrad (1837), Conrad (1853)
Margaron (Unio) ravenelianus — Lea (1852), Lea (1870)
Unio ravenelianus — Küster (1862)
Pleurobema (s.s.) rubella — Simpson (1900)
Pleurobema (s.s.) rubellum — Simpson (1914), Frierson (1927)
Pleurobema rubellum — Haas (1969), Parmalee & Bogan (1998)
Pleurobema oviforme — Parmalee & Bogan (1998), Williams et al. (2008)

Unio patulus Conrad, 1838
‘Lea’ Conrad, 1838, Monogr. Fam. Unionidae 1(10): 92, pl. 50, fig. 2.
(misidentified reference to Unio patulus Lea, 1829)

Unio patulus — Conrad (1838)
Margaron (Unio) patulus — Lea (1852), Lea (1870)
Pleurobema (s.s.) clava — Simpson (1900)
Pleurobema oviforme — Ortmann (1918), Ortmann (1924)
Pleurobema (s.s.) oviformis — Frierson (1927)

Unio holstonensis Lea, 1840
Lea, 1840, Proc. Amer. Phil. Soc. 1: 288.
Lea, 1842, Trans. Amer. Phil. Soc. 8 [O. 3]: 212 [50], pl. 15, fig. 27.
Type(s): HOLOTYPE USNM_84641, Holston R., Tenn.

Unio holstonensis — Lea (1840), Conrad (1853), Küster (1862), Lewis (1871)
Margaron (Unio) holstonensis — Lea (1852), Lea (1870)
Unio (Lampsilis) holstonensis — Adams & Adams (1857)
Pleurobema (s.s.) holstonensis — Simpson (1900)
Pleurobema (s.s.) holstonense — Simpson (1914)
Pleurobema oviforme holstonense — Ortmann (1918), Ortmann (1924), Ortmann (1925)
Pleurobema (s.s.) oviformis — Frierson (1927)
Pleurobema oviforme — Haas (1969), Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)
Pleurobema oviformis — R.I. Johnson (1980)

Unio decisus Küster, 1852
‘Lea’ Küster, 1852, Conchyl. Cab. 9(2): 41, pl. 8, fig. 1. [in part]
(misidentified reference to Unio decisus Lea, 1831)

Unio decisus — Küster (1852)
Pleurobema (s.s.) raveneliana — Simpson (1900)
Pleurobema (s.s.) ravenelianum — Simpson (1914)
Quadrula (Pleuronaia) argentea — Frierson (1927)
Pleurobema oviforme — Parmalee & Bogan (1998)

Unio lesleyi Lea, 1860
Lea, 1860, Proc. Acad. Nat. Sci. 12: 306.
Lea, 1860, Jour. Acad. Nat. Sci. 4 [O. 8]: 352, pl. 58, fig. 177.
Type(s): HOLOTYPE USNM_84759, Kentucky.

Unio lesleyi — Lea (1860), Lewis (1871)
Margaron (Unio) lesleyi — Lea (1870)
Pleurobema (s.s.) lesleyi — Simpson (1900), Simpson (1914)
Pleurobema oviforme — Ortmann (1918), Ortmann (1924), Parmalee & Bogan (1998), Williams et al. (2008)
Quadrula (Pleuronaia) argentea — Frierson (1927), Haas (1969)

Unio clinchensis Lea, 1867
Lea, 1867, Proc. Acad. Nat. Sci. 19: 81.
Lea, 1868, Jour. Acad. Nat. Sci. 6 [O. 12]: 278 [38], pl. 37, fig. 91.
Type(s): HOLOTYPE USNM_84596, Clinch R., Tenn.

Unio clinchensis — Lea (1867), Lewis (1871)
Margaron (Unio) clinchensis — Lea (1870)
Pleurobema (s.s.) cuneolus — Simpson (1900)
Pleurobema (s.s.) clinchense — Simpson (1914)
Pleurobema oviforme — Ortmann (1918), Ortmann (1924), Parmalee & Bogan (1998), Williams et al. (2008)
Quadrula (Pleuronaia) cuneola — Frierson (1927)
Quadrula (Pleuronaia) cuneolus — Haas (1969)
Fusconaia cuneolus — Burch (1975)

Unio planior Lea, 1868
Lea, 1868, Proc. Acad. Nat. Sci. 20: 145.
Lea, 1868, Jour. Acad. Nat. Sci. 6 [O. 12]: 316 [76], pl. 50, fig. 129.
Type(s): HOLOTYPE USNM_84391, Tennessee.

Unio planior — Lea (1868)
Margaron (Unio) planior — Lea (1870)
Pleurobema (s.s.) planior — Simpson (1900)
Pleurobema (s.s.) planius — Simpson (1914)
Pleurobema oviforme argenteum — Ortmann (1918)
Quadrula (Pleuronaia) striatissima — Frierson (1927), Haas (1969)
Pleurobema oviforme — Parmalee & Bogan (1998), Williams et al. (2008)

Unio acuens Lea, 1871
Lea, 1871, Proc. Acad. Nat. Sci. 23: 190.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 27 [31], pl. 8, fig. 24.
Type(s): HOLOTYPE USNM_84599, Holston R., near Concord, E. Tenn.

Unio acuens — Lea (1871), Pilsbry & Rhoads (1896)
Unio (sec. Lampsilis) accuens — Paetel (1890)
Pleurobema (s.s.) acuens — Simpson (1900), Simpson (1914)
Pleurobema oviforme holstonense — Ortmann (1918)
Quadrula (Pleuronaia) tesserulae — Frierson (1927), Haas (1969)
Pleurobema oviforme — Parmalee & Bogan (1998), Williams et al. (2008)

Unio lawi Lea, 1871
Lea, 1871, Proc. Acad. Nat. Sci. 23: 189.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 8 [12], pl. 2, fig. 4.
Type(s): HOLOTYPE USNM_84757, Holston R., Tenn.

Unio lawi — Lea (1871), Pilsbry & Rhoads (1896)
Pleurobema (s.s.) holstonensis — Simpson (1900)
Pleurobema (s.s.) holstonense — Simpson (1914)
Pleurobema oviforme holstonense — Ortmann (1918)
Quadrula (Pleuronaia) munda — Frierson (1927), Haas (1969)
Pleurobema oviforme — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)

Unio pattinoides Lea, 1871
Lea, 1871, Proc. Acad. Nat. Sci. 23: 193.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 16 [20], pl. 4, fig. 12.
Type(s): HOLOTYPE USNM_84763, Holston R., Tenn.

Unio pattinoides — Lea (1871)
Pleurobema (s.s.) holstonensis — Simpson (1900)
Pleurobema (s.s.) holstonense — Simpson (1914)
Pleurobema oviforme holstonense — Ortmann (1918)
Quadrula (Pleuronaia) munda — Frierson (1927), Haas (1969)
Pleurobema oviforme — Parmalee & Bogan (1998), Williams et al. (2008)

Unio bellulus Lea, 1872
Lea, 1872, Proc. Acad. Nat. Sci. 24: 161.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 50 [54], pl. 17, fig. 48.
Type(s): HOLOTYPE USNM_84772, Mussel Shoals, Tenn R., Alabama.

Unio bellulus — Lea (1872)
Pleurobema (s.s.) holstonensis — Simpson (1900)
Pleurobema (s.s.) holstonense — Simpson (1914)
Pleurobema oviforme holstonense — Ortmann (1918)
Quadrula (Pleuronaia) munda — Frierson (1927), Haas (1969)
Pleurobema oviforme — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)

Unio brevis Lea, 1872
Lea, 1872, Proc. Acad. Nat. Sci. 24: 157.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 35 [39], pl. 12, fig. 32.
Type(s): HOLOTYPE USNM_84546, Conasauga R., E. Tenn.

Unio brevis — Lea (1872)
Pleurobema (s.s.) brevis — Simpson (1900)
Pleurobema (s.s.) breve — Simpson (1914)
Pleurobema oviforme argenteum — Ortmann (1918)
Quadrula (Pleuronaia) striatissima — Frierson (1927), Haas (1969)
Pleurobema oviforme — Parmalee & Bogan (1998), Williams et al. (2008)

Unio conasaugaensis Lea, 1872
Lea, 1872, Proc. Acad. Nat. Sci. 24: 155.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 33 [37], pl. 10, fig. 30.
Type(s): HOLOTYPE USNM_85565, Conasauga Cr., Monroe Co., E. Tenn.

Unio conasaugaensis — Lea (1872)
Pleurobema (s.s.) conasaugaensis — Simpson (1900)
Pleurobema (s.s.) conasaugaense — Simpson (1914)
Pleurobema oviforme — Ortmann (1918), Parmalee & Bogan (1998), Williams et al. (2008)
Quadrula (Pleuronaia) striatissima — Frierson (1927), Haas (1969)

Unio clavus Call, 1885
‘Lamarck’ Call, 1885, unknown publication: ??.
(misidentified reference to Unio clava Lamarck, 1819)

Unio clavus — Call (1885)
Pleurobema oviforme — Ortmann (1924)

Unio accuens Paetel, 1890
‘Lea’ Paetel, 1890, Cat. Conch.-Samml. 3: 143.
(error for Unio acuens Lea, 1871)

Unio accuens — Paetel (1890)

Unio swordianus S.H. Wright, 1897
S.H. Wright, 1897, Nautilus 11: 4.
Type(s): LECTOTYPE USNM_149654, Br. of Clinch River, Va.

Unio swordianus — S.H. Wright (1897)
Pleurobema (s.s.) swordiana — Simpson (1900)
Pleurobema swordiana — Simpson (1900)
Pleurobema (s.s.) swordianum — Simpson (1914)
Pleurobema oviforme argenteum — Ortmann (1918)
Quadrula (Pleuronaia) striatissima — Frierson (1927), Haas (1969)
Pleurobema oviforme — Parmalee & Bogan (1998), Williams et al. (2008)

Pleurobema swordiana Simpson, 1900
‘Wright’ Simpson, 1900, Proc. Acad. Nat. Sci. 52: 81, pl. 4, fig. 4.
(reference to Unio swordianus S.H. Wright, 1897)

Pleurobema swordiana — Simpson (1900)
Pleurobema (s.s.) swordiana — Simpson (1900)
Quadrula (Pleuronaia) valida — Frierson (1927)

Pleurobema fassinans Ortmann, 1913
‘Lea’ Ortmann, 1913, Proc. Amer. Phil. Soc. 52(210): 310.
‘Lea’ Ortmann, 1914, Nautilus 28(3): 31.
(misidentified reference to Unio fassinans Lea, 1868)

Pleurobema fassinans — Ortmann (1913)
Pleurobema oviforme argenteum — Ortmann (1918)
Pleurobema oviforme — Parmalee & Bogan (1998)