MUSSELpdb
Taxonomy
Species & Genus Richness of
freshwater mussels
by Taxonomy
Species & Genus Richness of
freshwater bivalves
by Family
Geography
Species Richness & Endemism of
freshwater mussels
by Geography
Data last updated
Fri 13 February 2026
Bivalvia | ... | Unionoidea | Unionidae | Ambleminae | Pleurobemini | Fusconaia subrotunda
nominal species Quadrula flexuosa Simpson, 1900
Quadrula flexuosa Simpson, 1900 = Fusconaia subrotunda
Simpson, 1900. Proc. Acad. Nat. Sci. 52: 83, pl. 2, fig. 8.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 790.
Simpson, 1914. Descr. Cat. Naiades: 887.
Taxonomic Opinions
+ Fusconaia subrotunda (Lea, 1831) — Williams et al., 2008: 325.
+ Fusconaia subrotunda (Lea, 1831) — Parmalee & Bogan, 1998: 120.
+ Fusconaia subrotunda (Lea, 1831) — Burch, 1975: 177.
+ Fusconaia pilaris (Lea, 1840) — Haas, 1969: 316.
+ Quadrula (Fusconia [sic]) pilaris (Lea, 1840) — Frierson, 1927: 57.
+ Fusconaia pilaris lesueuriana (Lea, 1840) — Ortmann, 1918: 528.
= Quadrula (sec. Fusconaia) flexuosa Simpson, 1900 — Simpson, 1914: 887.
= Quadrula (sec. Fusconaia) flexuosa Simpson, 1900 — Simpson, 1900: 790.
= Quadrula flexuosa Simpson — Simpson, 1900: 83, pl. 2, fig. 8.
