Conrad, T.A. 1836. Monography of the Family Unionidae, or naiades of Lamarck, (fresh water bivalve shells) or North America, illustrated by figures drawn on stone from nature 1(5): 41-48, pls. 21-25. Available electronically.
‘Guérin’ Conrad, 1836. Monogr. Fam. Unionidae 1(5): 41.
(error for Unio cardiacea Guérin-Méneville, 1823)
‘Raf.’ Conrad, 1836. Monogr. Fam. Unionidae 1(5): 48, pl. 25.
(misidentified reference to Obovaria cordata Rafinesque, 1820)
‘Say’ Conrad, 1836. Monogr. Fam. Unionidae 1(5): 45, pl. 23, fig. 1.
Conrad, 1838. Monogr. Fam. Unionidae 2(11): back cover correginda [as ‘U. sayanus Ward’].
(misidentified reference to Unio declivis Say, 1831)
‘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)

‘Say’ Conrad, 1836. Monogr. Fam. Unionidae 1(5): 45, pl. 23, fig. 1 [as ‘U. declivis’].
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 257.
Conrad, 1854. Jour. Acad. Nat. Sci. 2(4): 296.
Type(s): HOLOTYPE ANSP_42852, small creek in Greene Co., Ala.
Conrad, 1836. Monogr. Fam. Unionidae 1(5): back cover.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 263 [as ‘Strophitus virgatus’].
+ Unio geometricus Lea, 1834
+ Unio nasuta Lamarck, 1819
+ Unio gibbosus Barnes, 1823
+ Obliquaria (Ellipsaria) cuprea Rafinesque, 1820
+ Obliquaria (Ellipsaria) atroviolacea Rafinesque, 1820
+ Obliquaria rubra Rafinesque, 1820
+ Unio pyramidatus Lea, 1831
+ Unio cardiacea Guérin-Méneville, 1823
+ Unio capillaris Lea, 1834
+ Unio verrucosus Barnes, 1823
+ Unio tuberculosus Valenciennes, 1827