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

Bartsch, 1906. Proc. U.S. Nat. Mus. 30: 393, pls. 27-29 [fig. 3?].
Type(s): HOLOTYPE (ORIG. DESIG.) USNM_186121, Nicaragua.
Nephronaias flucki — Bartsch (1906), Simpson (1914), Cummings et al. (2025)
Elliptio (Sphenonaias) flucki — Frierson (1927)
Nephronaias (Sphenonaias) flucki — Haas (1969)
Sphenonaias flucki — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)
Nephronaias flucki — Bartsch (1906), Simpson (1914), Cummings et al. (2025)
Elliptio (Sphenonaias) flucki — Frierson (1927)
Nephronaias (Sphenonaias) flucki — Haas (1969)
Sphenonaias flucki — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021)