- Descrito por / Described by:
Edward D. Cope, 1878

- Nome original / Original name:
Tetragonopterus longior

- Nome do artigo / Article name:
Synopsis of the fishes of the Peruvian Amazon, obtained by Professor Orton during his expeditions of 1873 and 1877.

- Publicado em / Published in:
Proceedings of the American Philosophical Society v. 17 (no. 101): 673-701.

- Localidade tipo / Type locality:
Moyabamba no rio Huallaga, Peru. / Moyabamba on Río Huallaga, Peru.