Unio subrotundus Lea, 1831
Lea, 1831, Trans. Amer. Phil. Soc. 4 [O. 1]: 117 [127], pl. 18, fig. 45.
Type(s): HOLOTYPE USNM_85832, Cincinnati, Ohio.

Unio subrotundus — Lea (1831), Jay (1835), Hanley (1843), Reeve (1865), Sowerby (1866), de Gregorio (1914), Henderson (1935)
Unio politus — Ferussac (1835), Conrad (1837), Küster (1852), Conrad (1853)
Margarita (Unio) subrotundus — Lea (1836)
Margaron (Unio) subrotundus — Lea (1852), Lea (1870)
Unio (Obovaria) subrotundus — Adams & Adams (1857)
Unio ebenus — Call (1895)
Quadrula (sec. Fusconaia) subrotunda — Simpson (1900), Simpson (1914)
Quadrula subrotunda — Ortmann (1909), Ortmann (1909), Ortmann (1909), Ortmann (1910)
Fusconaia subrotundus — Ortmann (1912), Williams et al. (1993), Turgeon et al. (1998)
Quadrula sintoxia — Vanatta (1915)
Fusconaia subrotunda — Ortmann (1919), Ortmann & Walker (1922), Ortmann (1924), Haas (1969), Burch (1975), R.I. Johnson (1980), Turgeon et al. (1988), Cummings & Mayer (1992), Parmalee & Bogan (1998), Lydeard et al. (1999), Graf (2002), Bogan (2002), Cicerello & Schuster (2003), Campbell et al. (2005), Graf & Cummings (2007), Burdick & White (2007), Williams et al. (2008), Cummings & Graf (2010), Bogan (2010), Haag (2012), IUCN (2012), Burlakova et al. (2012), Campbell & Lydeard (2012), Campbell & Lydeard (2012), Jones (2015), Williams et al. (2017), Perkins et al. (2017), Inoue et al. (2018), Pieri et al. (2018), Smith et al. (2020), Klymus et al. (2020), Inoue et al. (2020), Graf & Cummings (2021)
Fusconaia subtrotunda — Ortmann (1925)
Quadrula (Fusconia) subrotunda — Frierson (1927)
Fusconaia polita — Morrison (1969)
Fusconaia ebena — Oesch (1984)
Fusconaia subrotunda subrotunda — Watters et al. (2009), ITIS (2012)

Unio kirtlandianus Lea, 1834
Lea, 1834, Trans. Amer. Phil. Soc. 5 [O. 1]: 98 [210], pl. 14, fig. 41.
Type(s): HOLOTYPE USNM_85815, Mahoning R., Ohio.

Unio kirtlandianus — Lea (1834), Jay (1835), Conrad (1853), Küster (1861), Sowerby (1868), Pilsbry & Rhoads (1896)
Unio kirtlandicus — Ferussac (1835)
Margarita (Unio) kirtlandianus — Lea (1836)
Unio kirklandianus — Hanley (1843)
Margaron (Unio) kirtlandianus — Lea (1852), Lea (1870)
Unio (Obovaria) kirtlandianus — Adams & Adams (1857)
Quadrula (sec. Fusconaia) kirtlandiana — Simpson (1900), Simpson (1914)
Quadrula kirtlandiana — Ortmann (1909)
Quadrula subrotunda kirtlandiana — Ortmann (1909)
Quadrula subrotunda var. kirtlandiana — Ortmann (1910)
Fusconaia subrotundus — Ortmann (1912)
Fusconaia subrotunda kirtlandiana — Ortmann (1919)
Quadrula (Fusconia) kirtlandiana — Frierson (1927)
Fusconaia kirtlandiana — Haas (1969)
Fusconaia subrotunda — Burch (1975), R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008)
Fusconaia subrotunda subrotunda — Watters et al. (2009)
Fusconaia subrotunda kirklandiana — ITIS (2012)

Unio lesueurianus Lea, 1840
Lea, 1840, Proc. Amer. Phil. Soc. 1: 286.
Lea, 1842, Trans. Amer. Phil. Soc. 8 [O. 3]: 195 [33], pl. 8, fig. 6.
Type(s): HOLOTYPE USNM_85803, Holston R., Tenn.

Unio lesueurianus — Lea (1840), Küster (1861)
Margaron (Unio) lesueurianus — Lea (1852), Lea (1870)
Unio leseurianus — Conrad (1853)
Unio (Obovaria) lesueurianus — Adams & Adams (1857)
Unio ebenus — Lewis (1871), Call (1895)
Quadrula (sec. Fusconaia) pilaris — Simpson (1900), Simpson (1914)
Fusconaia pilaris lesueuriana — Ortmann (1918)
Quadrula (Fusconia) pilaris — Frierson (1927)
Fusconaia pilaris — Haas (1969)
Fusconaia subrotunda — Burch (1975), R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008)
Fusconaia subrotunda lesueuriana — Watters et al. (2009)
Fusconaia subrotunda lesueriana — ITIS (2012)

Unio pilaris Lea, 1840
Lea, 1840, Proc. Amer. Phil. Soc. 1: 285.
Lea, 1842, Trans. Amer. Phil. Soc. 8 [O. 3]: 209 [47], pl. 14, fig. 24.
Type(s): HOLOTYPE USNM_85817, French Broad R., Tenn.

Unio pilaris — Lea (1840), Conrad (1853), Küster (1861), Reeve (1865), Lewis (1871), Lewis (1872), Pilsbry & Rhoads (1896)
Margaron (Unio) pilaris — Lea (1852), Lea (1870)
Unio (Obovaria) pilaris — Adams & Adams (1857)
Quadrula (sec. Fusconaia) pilaris — Simpson (1900), Simpson (1914)
Fusconaia pilaris — Ortmann (1918), Haas (1969)
Quadrula (Fusconia) pilaris — Frierson (1927)
Fusconaia subrotunda — Burch (1975), R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008)
Fusconaia subrotunda pilaris — ITIS (2012)

Unio brevialis Crouch, 1827
‘Lamarck’ Crouch, 1827, Illustr. Lamarck’s Conch.: 16, pl. 9, fig. 3.
(misidentified reference to Unio brevialis Lamarck, 1819)

Unio brevialis — Crouch (1827)
Margarita (Unio) subrotundus — Lea (1836)
Margaron (Unio) subrotundus — Lea (1852), Lea (1870)
Unio politus — Conrad (1853)
Unio subrotundus — Reeve (1865)
Quadrula (sec. Fusconaia) subrotunda — Simpson (1900), Simpson (1914)
Fusconaia subrotunda — Burch (1975), Parmalee & Bogan (1998)

Unio politus Conrad, 1837
Say, 1834, Amer. Conch. 6: ??. [nomen nudum]
Conrad, 1837, Monogr. Fam. Unionidae 1(8): 67, pl. 37, fig. 2.

Unio politus — Ferussac (1835), Conrad (1837), Küster (1852), Conrad (1853), Sowerby (1866)
Margarita (Unio) subrotundus — Lea (1836)
Unio subrotundus — Hanley (1843), Reeve (1865)
Pleurobema politus — Agassiz (1852)
Margaron (Unio) subrotundus — Lea (1852), Lea (1870)
Quadrula (sec. Fusconaia) subrotunda — Simpson (1900), Simpson (1914)
Quadrula (Fusconia) subrotunda — Frierson (1927)
Fusconaia subrotunda — Haas (1969), Burch (1975), Parmalee & Bogan (1998)
Fusconaia polita — Morrison (1969)
Fusconaia subrotunda subrotunda — Watters et al. (2009)

Unio bursapastoris B.H. Wright, 1896
B.H. Wright, 1896, Nautilus 9(12): 133, pl. 3, fig. 2 [as ‘bursa-pastoris’].
Type(s): LECTOTYPE USNM_133427, Clinch R., Lee Co., Va.

Unio bursapastoris — B.H. Wright (1896)
Quadrula (sec. Fusconaia) bursa-pastoris — Simpson (1900), Simpson (1914)
Fusconaja bursa-pastoris — Ortmann (1913)
Fusconaia pilaris bursa-pastoris — Ortmann (1918)
Quadrula (Fusconia) bursa-pastoris — Frierson (1927)
Fusconaia bursapastoris — Haas (1969)
Fusconaia subrotunda — Burch (1975), R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008)

Obliquaria (Rotundaria) subrotunda var. maculata Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 308.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 52.
(intro'd as intra-sp. of Obliquaria (Rotundaria) subrotunda Rafinesque, 1820)

Obliquaria (Rotundaria) subrotunda var. maculata — Rafinesque (1820)
Fusconaia subrotunda — Williams et al. (2008), IUCN (2012)
Fusconaia subrotunda subrotunda — Watters et al. (2009)

Unio personatus Conrad, 1834
‘Say’ Conrad, 1834, New Fresh-Water Shells: 71.
(misidentified reference to Unio personatus Say, 1829)

Unio personatus — Conrad (1834)
Unio politus — Ferussac (1835)
Quadrula (sec. Fusconaia) subrotunda — Simpson (1900), Simpson (1914)
Fusconaia subrotunda — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)
Fusconaia subrotunda subrotunda — Watters et al. (2009)

Unio kirtlandicus Ferussac, 1835
‘Lea’ Ferussac, 1835, Mag. Zool. 5: 29.
(error for Unio kirtlandianus Lea, 1834)

Unio kirtlandicus — Ferussac (1835)

Unio kirklandianus Hanley, 1843
Hanley, 1843, Illustr. Descr. Cat. Rec. Bivalve Shells: 203.
ITIS, 2012, ITIS: [web].
(error for Unio kirtlandianus Lea, 1834)

Unio kirklandianus — Hanley (1843)
Unio kirtlandianus — Küster (1861)
Quadrula (sec. Fusconaia) kirtlandiana — Simpson (1900), Simpson (1914)
Fusconaia subrotunda — Parmalee & Bogan (1998)
Fusconaia subrotunda subrotunda — Watters et al. (2009)

Unio leseurianus Conrad, 1853
‘Lea’ of Authors.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 251.
Frierson, 1927, Check List N. Amer. Naiades: 56.
(error for Unio lesueurianus Lea, 1840)

Unio leseurianus — Conrad (1853)

Unio subrotundoides Lea, 1868
Lea, 1868, Proc. Acad. Nat. Sci. 20: 163.

Unio subrotundoides — Lea (1868)
Unio subrotundus — Henderson (1935)

Unio globatus Lea, 1871
Lea, 1871, Proc. Acad. Nat. Sci. 23: 191.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 5 [9], pl. 1, fig. 1.
Type(s): HOLOTYPE USNM_85820, Holston R., Tenn.

Unio globatus — Lea (1871)
Unio ebenus — Call (1895)
Quadrula (sec. Fusconaia) globata — Simpson (1900), Simpson (1914)
Fusconaia pilaris — Ortmann (1918), Haas (1969)
Quadrula (Fusconia) pilaris — Frierson (1927)
Fusconaia subrotunda — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)

Unio ebenus Call, 1894
Call, 1894, Proc. Indiana Acad. Sci. 1893(3): ??.
(misidentified reference to Unio ebenus Lea, 1831)

Unio ebenus — Call (1894)
Quadrula (Fusconia) subrotunda — Frierson (1927)

Quadrula flexuosa Simpson, 1900
Simpson, 1900, Proc. Acad. Nat. Sci. 52: 83, pl. 2, fig. 8.
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 790.
Simpson, 1914, Descr. Cat. Naiades: 887.

Quadrula flexuosa — Simpson (1900)
Quadrula (sec. Fusconaia) flexuosa — Simpson (1900), Simpson (1914)
Fusconaia pilaris lesueuriana — Ortmann (1918)
Quadrula (Fusconia) pilaris — Frierson (1927)
Fusconaia pilaris — Haas (1969)
Fusconaia subrotunda — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)

Quadrula (sec. Fusconaia) kirtlandiana var. minor Simpson, 1900
Simpson, 1900, Proc. U.S. Nat. Mus. 22: 791.
Simpson, 1914, Descr. Cat. Naiades: 892.
(intro'd as intra-sp. of Unio kirtlandianus Lea, 1834)
Type(s): LECTOTYPE USNM_150155, Scott Co., Va.

Quadrula (sec. Fusconaia) kirtlandiana var. minor — Simpson (1900), Simpson (1914)
Fusconaia subrotunda — R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008)

Quadrula andrewsae Marsh, 1902
Marsh, 1902, Nautilus 16: 8, pl. 1, upper figs.
(error for Quadrula andrewsii Marsh, 1902)

Quadrula andrewsae — Marsh (1902)
Quadrula (sec. Fusconaia) andrewsii — Simpson (1914)
Quadrula (Fusconia) pilaris — Frierson (1927)
Fusconaia pilaris — Haas (1969)
Fusconaia subrotunda — Parmalee & Bogan (1998), Williams et al. (2008)

Quadrula andrewsii Marsh, 1902
Marsh, 1902, Nautilus 15(10): 115.
Marsh, 1902, Nautilus 16: 8, pl. 1, two upper figs. [as andrewsæ].

Quadrula andrewsii — Marsh (1902)
Quadrula (sec. Fusconaia) andrewsii — Simpson (1914)
Fusconaia pilaris — Ortmann (1918), Haas (1969)
Quadrula (Fusconia) pilaris — Frierson (1927)
Fusconaia subrotunda — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)

Quadrula beauchampii Marsh, 1902
Marsh, 1902, Nautilus 16: 7, pl. 1, lower two figs.

Quadrula beauchampii — Marsh (1902)
Quadrula (sec. Fusconaia) beauchampii — Simpson (1914)
Fusconaia pilaris — Ortmann (1918), Haas (1969)
Quadrula (Fusconia) pilaris — Frierson (1927)
Fusconaia subrotunda — Burch (1975), Parmalee & Bogan (1998), Williams et al. (2008)

Fusconaja [sic] subrotunda leucogona Ortmann, 1913
Ortmann, 1913, Nautilus 27(8): 89.
(intro'd as intra-sp. of Unio subrotundus Lea, 1831)
Type(s): LECTOTYPE CM_61.5239, Elk River, Gassaway, Braxton County, West Virginia.

Fusconaja subrotunda leucogona — Ortmann (1913)
Fusconaia subrotunda — Burch (1975), R.I. Johnson (1980), Parmalee & Bogan (1998), Williams et al. (2008)
Fusconaia subrotunda subrotunda — Watters et al. (2009)

Fusconaia subtrotunda Ortmann, 1925
‘Lea’ Ortmann, 1925, Amer. Midl. Nat. 9: 328.
(error for Unio subrotundus Lea, 1831)

Fusconaia subtrotunda — Ortmann (1925)
Fusconaia subrotunda — Burch (1975)

Fusconaia subrotunda lesueriana ITIS, 2012
‘Lea’ ITIS, 2012, ITIS: [web].
(error for Unio lesueurianus Lea, 1840)

Fusconaia subrotunda lesueriana — ITIS (2012)