Lucena, Carlos A. S.; Malbarba, Luiz R.; Reis, Roberto E. (1992). "Resurrection of the Neotropical Pimelodid Catfish Parapimelodus nigribarbis (Boulenger), with a Phylogenetic Diagnosis of the Genus Parapimelodus (Teleostei: Siluriformes)". Copeia. 1992 (1): 138–146. doi:10.2307/1446545. JSTOR1446545.
Lucena, Carlos A. S.; Malbarba, Luiz R.; Reis, Roberto E. (1992). "Resurrection of the Neotropical Pimelodid Catfish Parapimelodus nigribarbis (Boulenger), with a Phylogenetic Diagnosis of the Genus Parapimelodus (Teleostei: Siluriformes)". Copeia. 1992 (1): 138–146. doi:10.2307/1446545. JSTOR1446545.