Bivalvia | ... | Unionoidea | Unionidae | Ambleminae | Pleurobemini | Pleurobema decisum

nominal species Unio medius Reeve, 1864

Unio medius Reeve, 1864 = Pleurobema decisum

specimen image from publication‘Lea’ Reeve, 1864. Conch. Icon. 16: pl. 17, sp. 77.
(misidentified reference to Unio medius Lea, 1861)

Taxonomic Opinions

+ Pleurobema decisum decisum (Lea, 1831) — Haas, 1969: 252.

+ Pleurobema (s.s.) decisus (Lea, 1831) — Frierson, 1927: 41.

+ Pleurobema (s.s.) decisum (Lea, 1831) — Simpson, 1914: 759.

+ Pleurobema (s.s.) decisa (Lea, 1831) — Simpson, 1900: 753.