| Key to the species of Tetragonopterus (Characidae: Tetragonopterinae) |
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| Silva, G.S.C., B.F. Melo, C. Oliveira and R.C. Benine 2013. Morphological and molecular evidence for two new species of Tetragonopterus (Characiformes: Characidae) from central Brazil. J. Fish Biol. 82(5):1613-1631. Ref No [93280] Key No. [44] |