- Descrito por / Described by:
James E. Böhlke, 1958

- Nome original / Original name:
Moenkhausia naponis

- Nome do artigo / Article name:
Studies on fishes on the family Characidae.--No. 14. A report on several extensive recent collections from Ecuador.

- Publicado em / Published in:
Proceedings of the Academy of Natural Sciences of Philadelphia v. 110: 1-121, Pls. 1-7.

- Localidade tipo / Type locality:
Cabeceiras do rio Arajuno, Equador, 1°24' to 1°26'S, 77°50' to 77°55'W, elevação 1000-1050 metros. / Headwaters of Río Arajuno, Ecuador, 1°24' to 1°26'S, 77°50' to 77°55'W, elevation 1000-1050 meters.