Obliquaria (Quadrula) bullata Rafinesque, 1820
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 307.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 51.
(homonym of Obliquaria (Quadrula) flexuosa var. bullata Rafinesque, 1820)
Type(s): NEOTYPE ANSP_20250, Kentucky River.

Obliquaria (Quadrula) retusa Rafinesque, 1820
Rafinesque, 1818, Amer. Mon. Mag. 3: 355 [as ‘Potamilus retusus’]. [nomen nudum]
Rafinesque, 1819, Jour. Phys. Chim. Hist. Nat. 88: 427 [as ‘U. (Obovaria) retusa’]. [nomen nudum]
Rafinesque, 1820, Ann. Gén. Sci. Phys. 5 (13): 306, pl. 81, figs. 19-20.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 22, 29, 50.
(renamed Unio premorsus Rafinesque, 1831)
Type(s): NEOTYPE ANSP_20220, Green River.

Unio verrucosa Valenciennes, 1827
Valenciennes, 1827, Recueil Observ. Zool. Anat. Comp. 2(11-12): 231, pl. 53, fig. 2.
(homonym of Unio verrucosus Barnes, 1823)

Unio premorsus Rafinesque, 1831
Rafinesque, 1831, Continuation: 4.
Rafinesque, 1864, [in] Binney & Tryon, reprint: 77.
(new name for Obliquaria (Quadrula) retusa Rafinesque, 1820)

Unio pustulosus Lea, 1831
Lea, 1831, Trans. Amer. Phil. Soc. 4 [O. 1]: 76 [86], pl. 7, fig. 7.

Unio nodulosus Say, 1834
Say, 1834, Amer. Conch. 6: ??.
(misidentified reference to Mya nodulosa Wood, 1815)

Unio prasinus Conrad, 1834
Conrad, 1834, New Fresh-Water Shells: 44, pl. 3, fig.1.
Conrad, 1837, Monogr. Fam. Unionidae 1(9): 79, pl. 44, fig. 2.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 255.

Unio schoolcraftensis Lea, 1834
Lea, 1834, Trans. Amer. Phil. Soc. 5 [O. 1]: 37 [149], pl. 3, fig. 9.

Unio dorfuillianus Lea, 1836
Lea, 1836, Synopsis Fam. Naiades: addenda. [nomen nudum]
(incorrect original spelling of Unio dorfeuillianus Lea, 1838)

Unio mortoni Conrad, 1836
Conrad, 1836, Monogr. Fam. Unionidae 1(2): 11, pl. 6, fig. 1.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 252.
Type(s): HOLOTYPE ANSP_10287A, Bayou Teche, Louisiana.

Unio bullatus Conrad, 1838
‘Rafinesque’ of Authors.
Conrad, 1838, Monogr. Fam. Unionidae 1(10): 82, pl. 45, fig. 2.
Lapham, 1852, Trans. WI Agri. Soc. 2: 369.
Reeve, 1864, Conch. Icon. 16: pl. 12, sp. 43.
(reference to Obliquaria (Quadrula) bullata Rafinesque, 1820)

Unio dorfeuillianus Lea, 1838
Lea, 1836, Synopsis Fam. Naiades: addenda [as ‘dorfuillianus’]. [nomen nudum]
Lea, 1838, Trans. Amer. Phil. Soc. 6 [O. 2]: 73, pl. 17, fig. 54.
(correct name for Unio dorfuillianus Lea, 1836)
Type(s): HOLOTYPE USNM_84215, Wabash River, Ind.

Unio turgidus Lea, 1838
Lea, 1836, Synopsis Fam. Naiades: 16. [nomen nudum]
Lea, 1838, Trans. Amer. Phil. Soc. 6 [O. 2]: 11, pl. 5, fig. 11.
Type(s): HOLOTYPE USNM_84277, near New Orleans, La.

Unio nodiferus Conrad, 1841
Conrad, 1841, Proc. Acad. Nat. Sci. 1: 19.
Conrad, 1850, Jour. Acad. Nat. Sci. 1: 277, pl. 38, figs. 4, 8.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 253.
Type(s): LECTOTYPE ANSP_10285, Jackson, La.

Unio pernodosus Lea, 1845
Lea, 1845, Proc. Amer. Phil. Soc. 4: 163.
Lea, 1848, Trans. Amer. Phil. Soc. 10 [O. 4]: 71 [45], pl. 3, fig. 8.
Type(s): SYNTYPE USNM_84298, N.C.

Unio aureus Lea, 1859
Lea, 1859, Proc. Acad. Nat. Sci. 11: 112.
Lea, 1862, Jour. Acad. Nat. Sci. 5 [O. 9]: 195 [17], pl. 26, fig. 264.
Type(s): HOLOTYPE USNM_84572, Texas.

Unio houstonensis Lea, 1859
Lea, 1859, Proc. Acad. Nat. Sci. 11: 155.
Lea, 1860, Jour. Acad. Nat. Sci. 4 [O. 8]: 358 [40], pl. 60, fig. 183.
Type(s): HOLOTYPE USNM_85768, Rutersville, Texas.

Unio pauperculus Lea, 1861
Lea, 1861, Proc. Acad. Nat. Sci. 13: 39.
Lea, 1862, Jour. Acad. Nat. Sci. 5 [O. 8]: 99 [103], pl. 15, fig. 247.
Type(s): HOLOTYPE USNM_85763, Columbus, Miss.

Unio refulgens Lea, 1868
Lea, 1868, Proc. Acad. Nat. Sci. 20: 145.
Lea, 1868, Jour. Acad. Nat. Sci. 6 [O. 12]: 317 [77], pl. 51, fig. 130.
Type(s): HOLOTYPE USNM_84290, Enterprise, Lauderdale Co., Miss. [Alabama].

Unio sphaericus Lea, 1868
Lea, 1868, Proc. Acad. Nat. Sci. 20: 145 [as ‘sphæricus’].
Lea, 1868, Jour. Acad. Nat. Sci. 6 [O. 12]: 319 [79], pl. 51, fig. 132 [as ‘sphæricus’].
Type(s): HOLOTYPE USNM_84271, Pearl River, Jackson, Miss.

Unio vallatus Lea, 1868
Lea, 1868, Jour. Acad. Nat. Sci. 6 [O. 12]: 315.
Lea, 1868, Jour. Acad. Nat. Sci. 6 [O. 12]: 315 [75], pl. 50, fig. 128.
Type(s): HOLOTYPE USNM_84275, Alabama R., Ala.

Margaron (Unio) spaericus Lea, 1870
‘Lea’ Lea, 1870, Synopsis Fam. Naiades: 33 [as ‘spæricus’].
(error for Unio sphaericus Lea, 1868)

Unio schoolcraftii Lea, 1870
‘Lea’ Lea, 1870, Synopsis Fam. Naiades: 33.
(error for Unio schoolcraftensis Lea, 1834)

Unio cahabensis Lea, 1871
Lea, 1871, Proc. Acad. Nat. Sci. 23: 190.
Lea, 1874, Jour. Acad. Nat. Sci. 8 [O. 13]: 17 [21], pl. 5, fig. 14.
Type(s): HOLOTYPE USNM_84204, Cahaba R., Ala.

Unio nodiferous Singley, 1893
‘Conrad’ Singley, 1893, Geol. Surv. Texas (1892): 319.
(error for Unio nodiferus Conrad, 1841)

Unio turgidis Singley, 1893
‘Lea’ Singley, 1893, Geol. Surv. Texas (1892): 319.
(error for Unio turgidus Lea, 1838)

Unio pustulosus Call, 1895
‘Lea’ Call, 1895, Trans. Acad. Sci. St. Louis 7: 42, pl. 15, figs. 3-4.
(reference to Unio pustulosus Lea, 1831)

Quadrula archeri Frierson, 1905
Frierson, 1905, Nautilus 19(2): 13, pl. 1, figs. 1-2.
Type(s): HOLOTYPE UMMZ_113538, Tallapoosa River, Tallassee, Elmore, Alabama.

Quadrula pustulosa asperatus Utterback, 1915
‘Lea’ Utterback, 1915, Amer. Midl. Nat. 4(4): 134, pl. 17, figs. 42a-b.
(misidentified reference to Unio asperatus Lea, 1861)

Unio petrinus Frierson, 1927
‘Call (Mss)’ Frierson, 1927, Check List N. Amer. Naiades: 49.
(intro'd as syn of Unio aureus Lea, 1859)