nominal species Unio nigerrimus Lea, 1852
 Lea, 1852, Trans. Amer. Phil. Soc. 10 [O. 5]: 268, pl. 18, fig. 23.
Type(s): HOLOTYPE USNM_85307, Alexandria, Louisiana.
= Leaunio lienosus Taxonomic Opinions
+ Leaunio lienosus caliginosus (Lea, 1845) — (Watters, 2018)
+ Villosa lienosa (Conrad, 1834) — (Watters et al., 2009)
+ Villosa lienosa (Conrad, 1834) — (Williams et al., 2008)
+ Villosa lienosa (Conrad, 1834) — (Parmalee & Bogan, 1998)
+ Villosa lienosa (Conrad, 1834) — (Howells et al., 1996)
+ Villosa lienosa (Conrad, 1834) — (Vidrine, 1993)
+ Villosa lienosa (Conrad, 1834) — (Burch, 1975)
+ Ligumia lienosa (Conrad, 1834) — (Haas, 1969)
+ Villosa lienosus (Conrad, 1834) — (Clench & Turner, 1956)
+ Lampsilis (Ligumia) lienosa (Conrad, 1834) — (Frierson, 1927)
= Lampsilis (Eurynia) nigerrima (Lea, 1852) — (Simpson, 1914)
= Lampsilis (sec. Eurynia) nigerrimus (Lea, 1852) — (Simpson, 1900)
+ Unio subrostratus Say, 1831 — (Call, 1895)
= Unio nigerrimus Lea — (Singley, 1893)
= Margaron (Unio) nigerrimus (Lea) — (Lea, 1870)
= Unio (Hyridella) nigerrimus Lea — (Adams & Adams, 1857)
= Unio nigerrimus Lea, 1852 — (Conrad, 1853)
= Margaron (Unio) nigerrimus (Lea) — (Lea, 1852)
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