Unio phaseolus Hildreth, 1828
Hildreth, 1828, Amer. J. Sci. 14: 283.
Say, 1834, Amer. Conch. 6: pl. 22.

Unio apiculatus Say, 1829
Say, 1829, New Harm. Dissem. 2(20): 309, sp. 8.
Say, 1834, Amer. Conch. 6: pl. 52.
Say, 1858, [in] Binney, Compl. Writings T. Say: 131, 207, 225.

Unio nexus Say, 1831
Say, 1831, Transylvania J. Med. Assoc. Sci. 4: 527.
Say, 1834, Amer. Conch. 6: pl. 51.

Unio ohiensis Say, 1834
‘Rafinesque’ Say, 1834, Amer. Conch. 6: [synonymy].
(reference to Anodonta (Lastena) ohiensis Rafinesque, 1820)

Unio retusus Say, 1834
Say, 1834, Amer. Conch. 6: ??.
(misidentified reference to Unio retusa Lamarck, 1819)

Unio obovalis Say, 1834
Say, 1834, Amer. Conch. 6: [unpaginated].
(reference to Obovaria obovalis Rafinesque, 1820)

Unio dilatatus Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: ??.
Conrad, 1836, Monogr. Fam. Unionidae 1(5): 42, pl. 21.
(reference to Unio (Eurynia) dilatata Rafinesque, 1820)

Unio laevigatus Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: [no pagination].
Conrad, 1834, New Fresh-Water Shells: 70.
Ferussac, 1835, Mag. Zool. 5: 28.
Lea, 1836, Synopsis Fam. Naiades: 59.
Lea, 1852, Synopsis Fam. Naiades: 57.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 251.
Ortmann, 1921, Mem. Carnegie Mus. 8: 92.
(error for Unio (Aximedia) levigata Rafinesque, 1820)

Alasmidonta marginata Say, 1834
Say, 1834, Amer. Conch. 6: ??.
(misidentified reference to Alasmidonta marginata Say, 1818)

Unio scalenius Say, 1834
Say, 1834, Amer. Conch. 6: ??.
(misidentified reference to Obliquaria (Scalenaria) scalenia Rafinesque, 1820)

Unio fasciolus Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: ??.
Conrad, 1836, Monogr. Fam. Unionidae 1(3): 26, pl. 11, fig. 2.
(reference to Lampsilis fasciola Rafinesque, 1820)

Unio ellipsarius Say, 1834
‘Rafinesque’ Say, 1834, Amer. Conch. 6: 224.
(misidentified reference to Obliquaria (Ellipsaria) ellipsaria Rafinesque, 1820)

Unio quadrulus Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: pl. 53.
Conrad, 1840, Monogr. Fam. Unionidae 2(13): 112, pl. 62.
(reference to Obliquaria (Quadrula) quadrula Rafinesque, 1820)

Unio teres Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: ??.
Conrad, 1836, Monogr. Fam. Unionidae 1(6): 52, pl. 28.
(reference to Unio (Eurynia) teres Rafinesque, 1820)

Unio nodulatus Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: ??.
Conrad, 1837, Monogr. Fam. Unionidae 1(9): 80, pl. 45, fig. 1.
Reeve, 1864, Conch. Icon. 16: pl. 13, sp. 51.
(reference to Obliquaria (Quadrula) nodulata Rafinesque, 1820)

Unio stegarius Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: ??.
Ferussac, 1835, Mag. Zool. 5: 28.
Conrad, 1838, Monogr. Fam. Unionidae 1(10): 83, pl. 46, fig. 1.
Reeve, 1864, Conch. Icon. 16: pl. 12, sp. 45.
(reference to Obovaria stegaria Rafinesque, 1820)

Unio lineolatus Say, 1834
‘Rafinesque’ of Authors.
‘Rafinesque’ Say, 1834, Amer. Conch. 6: pl. 68.
‘Rafinesque’ Conrad, 1834, New Fresh-Water Shells: 70.
(reference to Obliquaria (Plagiola) lineolata Rafinesque, 1820)

Unio truncatus Say, 1834
‘Rafinesque’ Say, 1834, Amer. Conch. 6: .
‘Rafinesque’ Say, 1838, Amer. Conch. 7: pl. 67.
(reference to Truncilla truncata Rafinesque, 1820)

Unio verrucosus Say, 1834
‘Rafinesque’ of Authors.
‘Rafinesque’ Say, 1834, Amer. Conch. 6: ??.
‘Rafinesque’ Sowerby, 1868, Conch. Icon. 16: pl. 1, sp. 4.
(reference to Obliquaria (Ellipsaria) verrucosa Rafinesque, 1820)

Unio obliquatus Say, 1834
‘Rafinesque’ of Authors.
Say, 1834, Amer. Conch. 6: ??.
Conrad, 1834, New Fresh-Water Shells: 70.
(reference to Obliquaria (Scalenaria) obliquata Rafinesque, 1820)

Unio cuneatus Say, 1834
‘Rafinesque’ Say, 1834, Amer. Conch. 6: ??.
(reference to Pleurobema cuneata Rafinesque, 1820)

Unio triagularis Say, 1834
Say, 1834, Amer. Conch. 6: ??.
(misidentified reference to Unio triangularis Barnes, 1823)

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

Unio interruptus Conrad, 1834
‘Rafinesque’ of Authors.
Conrad, 1834, New Fresh-Water Shells: 69.
Say, 1834, Amer. Conch. 6: ??.
Ferussac, 1835, Mag. Zool. 5: 28.
Conrad, 1838, Monogr. Fam. Unionidae 1(10): 88, pl. 48.
Reeve, 1864, Conch. Icon. 16: pl. 14, sp. 56.
(misidentified reference to Obliquaria (Plagiola) interrupta Rafinesque, 1820)

Unio nervosa Conrad, 1834
‘Rafinesque’ of Authors.
Conrad, 1834, New Fresh-Water Shells: 70.
Say, 1834, Amer. Conch. 6: ??.
Lapham, 1852, Trans. WI Agri. Soc. 2: 369.
Agassiz, 1852, Arch. Naturg. 18(1): 48.
Conrad, 1853, Proc. Acad. Nat. Sci. 6: 252.
(misidentified reference to Unio (Leptodea) nervosa Rafinesque, 1820)

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