Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Popenaiadini | Nephronaias

Lea, 1869. Proc. Acad. Nat. Sci. 21: 124.
Lea, 1874. Jour. Acad. Nat. Sci. 8 [O. 13]: 25 [29], pl. 8, fig. 22.
Type(s): LECTOTYPE [AS HOLOTYPE] USNM_84414 (by Johnson & Baker, 1973: 161), Rio Gigillillo, Corcuera, Nicaragua.
Nephronaias macnielii — Simpson (1900), Simpson (1914), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025)
Unio (Simonaias) macnieli — Martens (1900)
Nephronaias macneilii [sic] — Pilsbry (1920)
Elliptio (Nephronaias) aeruginosus — Frierson (1927)
Elliptio (Nephronaias) macnielii — Haas (1929)
Nephronaias (s.s.) macnielii — Haas (1969)
‘Lea’ Pilsbry, 1920. Proc. Acad. Nat. Sci. 72: 10.
(error for Unio macnielii Lea, 1869)
Nephronaias macnielii — Simpson (1900), Simpson (1914), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025)
Unio (Simonaias) macnieli — Martens (1900)
Nephronaias macneilii [sic] — Pilsbry (1920)
Elliptio (Nephronaias) aeruginosus — Frierson (1927)
Elliptio (Nephronaias) macnielii — Haas (1929)
Nephronaias (s.s.) macnielii — Haas (1969)