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Römer, U.; Hahn, I. J.; Vergara, P. M. (2010). Description of Discrossus foirni sp. n. and Dicrossus warzeli sp. n. (Teleostei: Perciformes: Cichlidae), two new cichlid species from the Rio Negro and the Rio Tapajós, Amazon drainage, Brazil. Vertebrate Zoology. 60(2): 123-138.