Description d'une Pastenague fluviatile du Meta (Pastenague de Humboldt). Annales des Sciences Naturelle, 16: 104–107
Description d’une pastenaque fluviatile du Meta (Pastenague de Humboldt). Bulletin des Sciences Naturelles et de Géologie (Férussac), Paris 16 (3), 464–466
On the pelvis and external sexual organs of selachians, with special reference to the new genera Potamotrygon and Disceus. Proceedings of the Boston Society of Natural History, 19, 197–215
A further contribution to the ichthyology of Venezuela. Proceedings of the United States National Museum, 99(3235), 1–211
The first two species of South American freshwater stingrays of the genus Potamotrygon, reported from the Orinoco Basin of Colombia by François Roulin in 1829. Aqua, International Journal of Ichthyology, 26(3–4), 92–112
