1. Species Quadrula (Fusconaia) andrewsii (W. A. Marsh, 1902) accepted as Fusconaia subrotunda (I. Lea, 1831) (unaccepted > junior subjective synonym)
2. Species Quadrula (Fusconaia) antrosa (Rafinesque, 1820) accepted as Reginaia ebenus (I. Lea, 1831)
3. Species Quadrula (Fusconaia) beadleiana (I. Lea, 1861) accepted as Pleurobema beadleianum (I. Lea, 1861)
4. Species Quadrula (Fusconaia) beauchampii (W. A. Marsh, 1902) accepted as Fusconaia subrotunda (I. Lea, 1831) (unaccepted > junior subjective synonym)
5. Species Quadrula (Fusconaia) bursapastoris (B. H. Wright, 1896) accepted as Fusconaia subrotunda (I. Lea, 1831)
6. Species Quadrula (Fusconaia) castanea C. T. Simpson, 1914 accepted as Fusconaia flava (Rafinesque, 1820)
7. Species Quadrula (Fusconaia) cerina (Conrad, 1838) accepted as Fusconaia flava (Rafinesque, 1820)
8. Species Quadrula (Fusconaia) chickasawhensis (I. Lea, 1861) accepted as Pleurobema beadleianum (I. Lea, 1861)
9. Species Quadrula (Fusconaia) chunii (I. Lea, 1862) accepted as Fusconaia flava (Rafinesque, 1820)
10. Species Quadrula (Fusconaia) coccinea (Conrad, 1836) accepted as Pleurobema sintoxia (Rafinesque, 1820)
11. Species Quadrula (Fusconaia) cuneus (Conrad, 1838) accepted as Pleurobema sintoxia (Rafinesque, 1820)
12. Species Quadrula (Fusconaia) ebenus (I. Lea, 1831) accepted as Reginaia ebenus (I. Lea, 1831) (recombination)
13. Species Quadrula (Fusconaia) flava (Rafinesque, 1820) accepted as Fusconaia flava (Rafinesque, 1820)
14. Species Quadrula (Fusconaia) flexuosa (Rafinesque, 1820) accepted as Epioblasma flexuosa (Rafinesque, 1820)
15. Species Quadrula (Fusconaia) flexuosa (C. T. Simpson, 1900) accepted as Fusconaia subrotunda (I. Lea, 1831)
16. Species Quadrula (Fusconaia) friersoni (B. H. Wright, 1896) accepted as Pleurobema riddellii (I. Lea, 1862)
17. Species Quadrula (Fusconaia) glandacea (I. Lea, 1861) accepted as Fusconaia flava (Rafinesque, 1820)
18. Species Quadrula (Fusconaia) globata (I. Lea, 1871) accepted as Fusconaia subrotunda (I. Lea, 1831)
19. Species Quadrula (Fusconaia) hebetata (Conrad, 1854) accepted as Fusconaia flava (Rafinesque, 1820)
20. Species Quadrula (Fusconaia) kirtlandiana (I. Lea, 1834) accepted as Fusconaia subrotunda (I. Lea, 1831) (recombination)
21. Species Quadrula (Fusconaia) lananensis Frierson, 1901 accepted as Fusconaia askewi (W. A. Marsh, 1896) (junior synonym)
22. Species Quadrula (Fusconaia) obliqua (Lamarck, 1819) accepted as Pleurobema cordatum (Rafinesque, 1820)
23. Species Quadrula (Fusconaia) ozarkensis (Call, 1887) accepted as Fusconaia ozarkensis (Call, 1887)
24. Species Quadrula (Fusconaia) pannosa (C. T. Simpson, 1900) accepted as Fusconaia ozarkensis (Call, 1887)
25. Species Quadrula (Fusconaia) pilaris (I. Lea, 1840) accepted as Fusconaia subrotunda (I. Lea, 1831)
26. Species Quadrula (Fusconaia) plena (I. Lea, 1840) accepted as Pleurobema plenum (I. Lea, 1840)
27. Species Quadrula (Fusconaia) pumila (I. Lea, 1838) accepted as Fusconaia masoni (Conrad, 1834) (recombination)
28. Species Quadrula (Fusconaia) pyramidata (I. Lea, 1831) accepted as Pleurobema rubrum (Rafinesque, 1820) accepted as Pleurobema sintoxia (Rafinesque, 1820) (recombination)
29. Species Quadrula (Fusconaia) riddellii (I. Lea, 1862) accepted as Pleurobema riddellii (I. Lea, 1862)
30. Species Quadrula (Fusconaia) rubida (I. Lea, 1861) accepted as Fusconaia flava (Rafinesque, 1820)
31. Species Quadrula (Fusconaia) rubidula (Frierson, 1905) accepted as Fusconaia flava (Rafinesque, 1820)
32. Species Quadrula (Fusconaia) rubiginosa (I. Lea, 1829) accepted as Fusconaia flava (Rafinesque, 1820) (recombination)
33. Species Quadrula (Fusconaia) solida (I. Lea, 1839) accepted as Pleurobema sintoxia (Rafinesque, 1820)
34. Species Quadrula (Fusconaia) subelliptica (C. T. Simpson, 1900) accepted as Fusconaia ozarkensis (Call, 1887)
35. Species Quadrula (Fusconaia) subrotunda (I. Lea, 1831) accepted as Fusconaia subrotunda (I. Lea, 1831) (recombination)
36. Species Quadrula (Fusconaia) succissa (I. Lea, 1852) accepted as Rotundaria succissa (I. Lea, 1852) accepted as Cyclonaias succissa (I. Lea, 1852) accepted as Pustulosa pustulosa (I. Lea, 1831)
37. Species Quadrula (Fusconaia) trigona (I. Lea, 1831) accepted as Fusconaia flava (Rafinesque, 1820) (recombination)
38. Species Quadrula (Fusconaia) undata (Barnes, 1823) accepted as Fusconaia flava (Rafinesque, 1820)
39. Species Quadrula (Fusconaia) utriculus (I. Lea, 1845) accepted as Fusconaia masoni (Conrad, 1834)
40. Species Quadrula (Fusconaia) utterbackii (Frierson, 1915) accepted as Fusconaia ozarkensis (Call, 1887) (unaccepted > junior subjective synonym)
41. Species Quadrula (Fusconaia) wrightii C. T. Simpson, 1914 accepted as Rotundaria succissa (I. Lea, 1852) accepted as Cyclonaias succissa (I. Lea, 1852) accepted as Pustulosa pustulosa (I. Lea, 1831)
42. Species Quadrula (Fusconaia) askewi (W. A. Marsh, 1896) represented as Fusconaia askewi (W. A. Marsh, 1896)

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