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

Martens, 1900. Biol. Centr.-Amer., Moll.: 504, pl. 36, fig. 5-5a.
(intro'd as intra-sp. of Unio aztecorum Philippi, 1847)
Type(s): HOLOTYPE (MONOTYPY) ZMB_9106, Lagune de Chapala, Mexico.
Unio (Nephronaias) aztecorum var. chapalanus — Martens (1900)
Nephronaias aztecorum var. chapalanus — Simpson (1914)
Nephronaias (s.s.) aztecorum — Haas (1969)
Nephronaias chapalanus — Cummings et al. (2025)

Pilsbry, 1920. Proc. Acad. Nat. Sci. 72: 194, fig. 4.
(intro'd as intra-sp. of Unio aztecorum Philippi, 1847)
Type(s): HOLOTYPE (ORIG. DESIG.) ANSP_46195, Toliman, Jalisco [Mexico].
Nephronaias (s.s.) aztecorum — Haas (1969)
Nephronaias chapalanus — Cummings et al. (2025)
Unio (Nephronaias) aztecorum var. chapalanus — Martens (1900)
Nephronaias aztecorum var. chapalanus — Simpson (1914)
Nephronaias (s.s.) aztecorum — Haas (1969)
Nephronaias chapalanus — Cummings et al. (2025)