Na váš dotaz cetopsis-orinoco bylo nalezeno 2 příspěvků.
Schultz, L. P. 1944. The catfishes of Venezuela, with descriptions of thirty-eight new forms. Proc. U. S. Natl. Mus. v. 94 (no. 3172): 173-338, Pls. 1-14.
Spix, J. B. von & Agassiz, L. 1829-31. Selecta genera et species piscium quos in itinere per Brasiliam annis MDCCCXVII-MDCCCXX jussu et auspiciis Maximiliani Josephi I.... collegit et pingendos curavit Dr J. B. de Spix.... Monachii. Part 1: i-xvi + i-ii + 1-6 + 1-82, Pls. 1-48, Part 2: 83-138, Pls. 49-101.