1. Species Unio (Elliptio) aheneus I. Lea, 1843 accepted as Elliptio ahenea (I. Lea, 1843) (recombination)
2. Species Unio (Elliptio) amabilis I. Lea, 1865 accepted as Pleurobema pyriforme (I. Lea, 1857)
3. Species Unio (Elliptio) angustatus I. Lea, 1831 accepted as Elliptio angustata (I. Lea, 1831) (recombination)
4. Species Unio (Elliptio) aquilus I. Lea, 1857 accepted as Elliptio pullata (I. Lea, 1857)
5. Species Unio (Elliptio) arctatus Conrad, 1834 accepted as Elliptio arctata (Conrad, 1834)
6. Species Unio (Elliptio) attenuatus I. Lea, 1872 accepted as Elliptio folliculata (I. Lea, 1838)
7. Species Unio (Elliptio) aurata Rafinesque, 1820 accepted as Elliptio complanata ([Lightfoot], 1786)
8. Species Unio (Elliptio) brimleyi S. H. Wright, 1897 accepted as Fusconaia masoni (Conrad, 1834)
9. Species Unio (Elliptio) buckleyi I. Lea, 1843 accepted as Elliptio jayensis (I. Lea, 1838)
10. Species Unio (Elliptio) burkensis I. Lea, 1859 accepted as Elliptio complanata ([Lightfoot], 1786)
11. Species Unio (Elliptio) burtchianus S. H. Wright, 1897 accepted as Elliptio occulta (I. Lea, 1843)
12. Species Unio (Elliptio) buxtoni B. H. Wright, 1897 accepted as Elliptio jayensis (I. Lea, 1838)
13. Species Unio (Elliptio) catawbensis I. Lea, 1857 accepted as Elliptio complanata ([Lightfoot], 1786)
14. Species Unio (Elliptio) chipolaensis B. Walker, 1905 accepted as Elliptio chipolaensis (B. Walker, 1905)
15. Species Unio (Elliptio) complanatus ([Lightfoot], 1786) accepted as Elliptio complanata ([Lightfoot], 1786)
16. Species Unio (Elliptio) confertus I. Lea, 1834 accepted as Elliptio raveneli (Conrad, 1834) accepted as Elliptio icterina (Conrad, 1834) (recombination)
17. Species Unio (Elliptio) congaraeus I. Lea, 1831 accepted as Elliptio congaraea (I. Lea, 1831) (recombination)
18. Species Unio (Elliptio) coruscus A. Gould, 1856 accepted as Elliptio jayensis (I. Lea, 1838) (junior synonym)
19. Species Unio (Elliptio) crassidens Lamarck, 1819 accepted as Elliptio crassidens (Lamarck, 1819)
20. Species Unio (Elliptio) cunninghami B. H. Wright, 1883 accepted as Elliptio jayensis (I. Lea, 1838)
21. Species Unio (Elliptio) cuvierianus I. Lea, 1852 accepted as Elliptio complanata ([Lightfoot], 1786)
22. Species Unio (Elliptio) danielsii B. H. Wright, 1899 accepted as Elliptio crassidens (Lamarck, 1819)
23. Species Unio (Elliptio) dariensis I. Lea, 1842 accepted as Elliptio dariensis (I. Lea, 1842) (recombination)
24. Species Unio (Elliptio) differtus I. Lea, 1872 accepted as Elliptio complanata ([Lightfoot], 1786)
25. Species Unio (Elliptio) dispalans B. H. Wright, 1899 accepted as Elliptio occulta (I. Lea, 1843)
26. Species Unio (Elliptio) dorei B. H. Wright, 1888 accepted as Elliptio jayensis (I. Lea, 1838)
27. Species Unio (Elliptio) dorsatus I. Lea, 1868 accepted as Elliptio congaraea (I. Lea, 1831)
28. Species Unio (Elliptio) downiei I. Lea, 1858 accepted as Elliptio downiei (I. Lea, 1858)
29. Species Unio (Elliptio) duttonianus I. Lea, 1841 accepted as Elliptio lanceolata (I. Lea, 1827)
30. Species Unio (Elliptio) emmonsii I. Lea, 1857 accepted as Elliptio lanceolata (I. Lea, 1827)
31. Species Unio (Elliptio) errans I. Lea, 1857 accepted as Elliptio errans (I. Lea, 1857) accepted as Elliptio complanata ([Lightfoot], 1786)
32. Species Unio (Elliptio) fasciata Rafinesque, 1820 accepted as Ortmanniana ligamentina (Lamarck, 1819)
33. Species Unio (Elliptio) ferrissii Marsh, 1891 accepted as Elliptio jayensis (I. Lea, 1838)
34. Species Unio (Elliptio) fisherianus I. Lea, 1838 accepted as Elliptio fisheriana (I. Lea, 1838)
35. Species Unio (Elliptio) folliculatus I. Lea, 1838 accepted as Elliptio folliculata (I. Lea, 1838) (recombination)
36. Species Unio (Elliptio) forbesianus I. Lea, 1852 accepted as Elliptio congaraea (I. Lea, 1831)
37. Species Unio (Elliptio) fraternus I. Lea, 1852 accepted as Elliptio fraterna (I. Lea, 1852)
38. Species Unio (Elliptio) fuscatus I. Lea, 1843 accepted as Elliptio occulta (I. Lea, 1843) (recombination)
39. Species Unio (Elliptio) geminus I. Lea, 1857 accepted as Elliptio complanata ([Lightfoot], 1786)
40. Species Unio (Elliptio) gibbosus Barnes, 1823 accepted as Eurynia dilatata (Rafinesque, 1820)
41. Species Unio (Elliptio) guatemalanus E. von Martens, 1900 accepted as Nephronaias goascoranensis (I. Lea, 1858) (junior synonym)
42. Species Unio (Elliptio) hartwrightii B. H. Wright, 1896 accepted as Elliptio monroensis (I. Lea, 1843)
43. Species Unio (Elliptio) hazelhurstianus I. Lea, 1858 accepted as Elliptio lanceolata (I. Lea, 1827)
44. Species Unio (Elliptio) hinkleyi B. H. Wright, 1888 accepted as Elliptio jayensis (I. Lea, 1838)
45. Species Unio (Elliptio) hopetonensis I. Lea, 1838 accepted as Elliptio hopetonensis (I. Lea, 1838)
46. Species Unio (Elliptio) icterinus Conrad, 1834 accepted as Elliptio icterina (Conrad, 1834)
47. Species Unio (Elliptio) iheringi B. H. Wright, 1898 accepted as Sphenonaias taumilapana (Conrad, 1855)
48. Species Unio (Elliptio) incrassatus I. Lea, 1840 accepted as Elliptio crassidens (Lamarck, 1819)
49. Species Unio (Elliptio) insulsus I. Lea, 1857 accepted as Elliptio complanata ([Lightfoot], 1786)
50. Species Unio (Elliptio) inusitatis I. Lea, 1859 accepted as Elliptio hopetonensis (I. Lea, 1838)
51. Species Unio (Elliptio) jayensis I. Lea, 1838 accepted as Elliptio jayensis (I. Lea, 1838) (recombination)
52. Species Unio (Elliptio) lanceolatus I. Lea, 1827 accepted as Elliptio lanceolata (I. Lea, 1827)
53. Species Unio (Elliptio) lazarus I. Lea, 1852 accepted as Elliptio arctata (Conrad, 1834)
54. Species Unio (Elliptio) lecontianus I. Lea, 1838 accepted as Elliptio congaraea (I. Lea, 1831) (recombination)
55. Species Unio (Elliptio) lehmanii S. H. Wright, 1897 accepted as Elliptio occulta (I. Lea, 1843)
56. Species Unio (Elliptio) livingstonensis I. Lea, 1863 accepted as Elliptio icterina (Conrad, 1834)
57. Species Unio (Elliptio) luridus I. Lea, 1852 accepted as Elliptio arca (Conrad, 1834)
58. Species Unio (Elliptio) masoni Conrad, 1834 accepted as Fusconaia masoni (Conrad, 1834)
59. Species Unio (Elliptio) merus I. Lea, 1852 accepted as Fusconaia masoni (Conrad, 1834)
60. Species Unio (Elliptio) micans I. Lea, 1857 accepted as Elliptio icterina (Conrad, 1834)
61. Species Unio (Elliptio) mitchelli (C. T. Simpson, 1895) accepted as Fusconaia mitchelli (C. T. Simpson, 1895) (unaccepted > superseded combination)
62. Species Unio (Elliptio) monroensis I. Lea, 1843 accepted as Elliptio monroensis (I. Lea, 1843)
63. Species Unio (Elliptio) nasutulus I. Lea, 1863 accepted as Elliptio nasutidus (I. Lea, 1863)
64. Species Unio (Elliptio) naviculoides I. Lea, 1857 accepted as Elliptio lanceolata (I. Lea, 1827)
65. Species Unio (Elliptio) nigellus I. Lea, 1852 accepted as Elliptio nigella (I. Lea, 1852)
66. Species Unio (Elliptio) nigra Rafinesque, 1820 accepted as Elliptio crassidens (Lamarck, 1819)
67. Species Unio (Elliptio) oblatus I. Lea, 1863 accepted as Elliptio icterina (Conrad, 1834)
68. Species Unio (Elliptio) obnubilus I. Lea, 1857 accepted as Elliptio icterina (Conrad, 1834)
69. Species Unio (Elliptio) occultus I. Lea, 1843 accepted as Elliptio occulta (I. Lea, 1843) (recombination)
70. Species Unio (Elliptio) ocmulgeensis I. Lea, 1861 accepted as Elliptio icterina (Conrad, 1834)
71. Species Unio (Elliptio) oscari B. H. Wright, 1892 accepted as Elliptio jayensis (I. Lea, 1838)
72. Species Unio (Elliptio) perstriatus I. Lea, 1852 accepted as Elliptio arctata (Conrad, 1834)
73. Species Unio (Elliptio) pinei B. H. Wright, 1897 accepted as Elliptio jayensis (I. Lea, 1838)
74. Species Unio (Elliptio) plantii I. Lea, 1857 accepted as Elliptio fumata (I. Lea, 1857)
75. Species Unio (Elliptio) polymorphus B. H. Wright, 1899 accepted as Elliptio monroensis (I. Lea, 1843)
76. Species Unio (Elliptio) popeii I. Lea, 1857 accepted as Popenaias popeii (I. Lea, 1857)
77. Species Unio (Elliptio) productus Conrad, 1836 accepted as Elliptio producta (Conrad, 1836)
78. Species Unio (Elliptio) purus I. Lea, 1858 accepted as Elliptio complanata ([Lightfoot], 1786)
79. Species Unio (Elliptio) pusillus Barnes, 1840 accepted as Elliptio congaraea (I. Lea, 1831)
80. Species Unio (Elliptio) pygmaeus I. Lea, 1852 accepted as Lasmigona subviridis (Conrad, 1835)
81. Species Unio (Elliptio) roanokensis I. Lea, 1838 accepted as Elliptio roanokensis (I. Lea, 1838) (recombination)
82. Species Unio (Elliptio) rostraeformis I. Lea, 1857 accepted as Elliptio producta (Conrad, 1836)
83. Species Unio (Elliptio) rostrum I. Lea, 1862 accepted as Elliptio complanata ([Lightfoot], 1786)
84. Species Unio (Elliptio) sagittiformis I. Lea, 1852 accepted as Elliptio lanceolata (I. Lea, 1827)
85. Species Unio (Elliptio) sanctorumjohanium B. H. Wright, 1933 accepted as Elliptio jayensis (I. Lea, 1838) (unaccepted > junior subjective synonym)
86. Species Unio (Elliptio) shepardianus I. Lea, 1834 accepted as Elliptio shepardiana (I. Lea, 1834) (recombination)
87. Species Unio (Elliptio) singularis B. H. Wright, 1899 accepted as Elliptio pullata (I. Lea, 1857)
88. Species Unio (Elliptio) sloatianus I. Lea, 1840 accepted as Elliptoideus sloatianus (I. Lea, 1840)
89. Species Unio (Elliptio) sordidus I. Lea, 1852 accepted as Elliptio congaraea (I. Lea, 1831)
90. Species Unio (Elliptio) spadiceus I. Lea, 1857 accepted as Elliptio complanata ([Lightfoot], 1786)
91. Species Unio (Elliptio) sphenorhynchus Crosse & P. Fischer, 1894 accepted as Nephronaias sphenorhyncha (Crosse & P. Fischer, 1894) (unaccepted combination)
92. Species Unio (Elliptio) spissus I. Lea, 1859 accepted as Elliptio downiei (I. Lea, 1858)
93. Species Unio (Elliptio) stonensis I. Lea, 1840 accepted as Eurynia dilatata (Rafinesque, 1820)
94. Species Unio (Elliptio) striatulus I. Lea, 1857 accepted as Fusconaia masoni (Conrad, 1834)
95. Species Unio (Elliptio) strigosus I. Lea, 1840 accepted as Elliptio arctata (Conrad, 1834)
96. Species Unio (Elliptio) strumosus I. Lea, 1872 accepted as Elliptio congaraea (I. Lea, 1831)
97. Species Unio (Elliptio) subinflatus Conrad, 1835 accepted as Elliptio complanata ([Lightfoot], 1786)
98. Species Unio (Elliptio) subluridus C. T. Simpson, 1892 accepted as Elliptio jayensis (I. Lea, 1838) (unaccepted > junior subjective synonym)
99. Species Unio (Elliptio) subniger I. Lea, 1857 accepted as Elliptio fumata (I. Lea, 1857)
100. Species Unio (Elliptio) subplanus Conrad, 1837 (unaccepted)
101. Species Unio (Elliptio) sulfuriensis McLearn, 1945 † (unaccepted > superseded combination)
102. Species Unio (Elliptio) tenuisculus Frierson, 1911 (unaccepted)
103. Species Unio (Elliptio) tuomeyi I. Lea, 1852 (unaccepted)
104. Species Unio (Elliptio) viridis Rafinesque, 1820 (unaccepted)
105. Species Unio (Elliptio) viridulus I. Lea, 1863 (unaccepted)
106. Species Unio (Elliptio) waccamawensis I. Lea, 1863 (unaccepted)
107. Species Unio (Elliptio) waltoni B. H. Wright, 1888 (unaccepted)
108. Species Unio (Elliptio) webbianus B. H. Wright, 1934 (unaccepted > junior subjective synonym)
109. Species Unio (Elliptio) websterii B. H. Wright, 1888 (unaccepted)

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