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

- Nome original / Original name:
Characidium rex

- 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:
Próximo a foz do rio Bobonaza, Chicherota, província Pastaza, Equador. / Near the mouth of Río Bobonaza, Chicherota, Province Pastaza, Ecuador.