Unionoida | Unionoidea | Unionidae | Ambleminae | Pleurobemini | Fusconaia masoni nominal species Unio pumilus Lea, 1838
 Lea, 1836, Synopsis Fam. Naiades: 20. [nomen nudum]
Lea, 1838, Trans. Amer. Phil. Soc. 6 [O. 2]: 23, pl. 7, fig. 17.
Type(s): HOLOTYPE USNM_84545, Black Cr., N.C.
= Fusconaia masoni Taxonomic Opinions
+ Fusconaia masoni (Conrad, 1834) — Burch, 1975
+ Pleurobema (Lexingtonia) masoni (Conrad, 1834) — R.I. Johnson, 1970
+ Lexingtonia subplana (Conrad, 1834) — Haas, 1969
+ Pleurobema (Lexingtonia) subplanum (Conrad, 1837) — Frierson, 1927
= Quadrula (sec. Fusconaia) pumila (Lea, 1838) — Simpson, 1914
- NO OPINION — de Gregorio, 1914
= Quadrula (sec. Fusconaia) pumila (Lea, 1838) — Simpson, 1900
= Margaron (Unio) pumilus (Lea) — Lea, 1870
= Unio pumilus Lea, 1838 — Sowerby, 1866
= Unio (Lampsilis) pumilus Lea — Adams & Adams, 1857
= Unio pumilis [sic] Lea, 1838 — Conrad, 1853
= Margaron (Unio) pumilus (Lea) — Lea, 1852
= Unio pumilus Lea — Hanley, 1843
= Margarita (Unio) pumilus — Lea, 1836
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