- Descrito por / Described by:
Leonard P. Schultz, 1944

- Nome original / Original name:
Bryconamericus beta motatanensis

- Nome do artigo / Article name:
The fishes of the family Characinidae from Venezuela, with descriptions of seventeen new forms.

- Publicado em / Published in:
Proceedings of the United States National Museum v. 95 (no. 3181): 235-367.

- Localidade tipo / Type locality:
Rio San Juan, na ponte sul de Mene Grande, bacia do Motatán, Venezuela. / Río San Juan at bridge south of Mene Grande, Motatán system, Venezuela.