Pygidium atochae, Eigenmann, C. H. & Allen, W. R., 1942

Eigenmann, C. H. & Allen, W. R., 1942, Fishes of western South America. I. The intercordilleran and Amazonian lowlands of Peru. II. - The high pampas of Peru, Bolivia, and northern Chile. With a revision of the Peruvian Gymnotidae, and of the genus Orestias, University of Kentucky : 156

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