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Updated: Jul 30, 2025

DNA-based Fish Species Identification Protocol
Published on: April 28, 2010
Knodus borari, a new species from the lower Rio Tapajós basin (Characiformes: Characidae)
Cárlison Silva-Oliveira1, André L Colares Canto2, Frank Raynner V Ribeiro2
1Programa de Pós-Graduação em Sociedade, Natureza e Desenvolvimento, Universidade Federal do Oeste do Pará, Santarém, Brazil.
Abstract:
A new species of Knodus from the Rio Cupari, a right-bank tributary of the lower Rio Tapajós, is described. Among its congeners, the new species shares exclusively with K. figueiredoi the presence of only uni-tricuspid teeth in the premaxilla, maxilla and dentary. Knodus borari differs from K. figueiredoi by the colour pattern and morphological characteristics. The new species is the fifth species of the genus described from the Rio Tapajós basin, and the second restricted to the lower portion of the basin. This is additional evidence that the lower Rio Tapajós basin is a region of ichthyofaunal endemism.
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