Lucinda, Paulo H. F., Carlos A. S. Lucena, and Newton C. Assis. “Two New Species of Cichlid Fish Genus Geophagus Heckel from the Rio Tocantins Drainage (Perciformes: Cichlidae)”. Zootaxa 2429, no. 1 (April 19, 2010): 29–42. Accessed June 24, 2025. https://www.mapress.com/zt/article/view/zootaxa.2429.1.2.