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

Crosse & Fischer, 1894. J. de Conch. 41: 296.
Fischer & Crosse, 1894. Miss. Sci. Mexique, Rech. Zool. 2(16): 618, pl. 65, figs. 3-4.
Type(s): SYNTYPES MNHN_IM-2000-1799, Mexique, Santa Efigenia. lac formé dans le cratère d'un volcan éteint.
Nephronaias tehuantepecensis — Simpson (1900), Simpson (1914), Cummings et al. (2025)
Unio (Sphenonaias) tehuantepecensis — Martens (1900)
Elliptio (Sphenonaias) callosus — Frierson (1927)
Elliptio (Nephronaias) goascoranensis — Haas (1929)
Nephronaias (Popenaias) tehuantepecensis — Haas (1969)
Popenaias tehuantepecensis — Graf & Cummings (2007), Bogan (2010), Inoue et al. (2020), Graf & Cummings (2021), Czaja et al. (2023)
Nephronaias tehuantepecensis — Simpson (1900), Simpson (1914), Cummings et al. (2025)
Unio (Sphenonaias) tehuantepecensis — Martens (1900)
Elliptio (Sphenonaias) callosus — Frierson (1927)
Elliptio (Nephronaias) goascoranensis — Haas (1929)
Nephronaias (Popenaias) tehuantepecensis — Haas (1969)
Popenaias tehuantepecensis — Graf & Cummings (2007), Bogan (2010), Inoue et al. (2020), Graf & Cummings (2021), Czaja et al. (2023)