Carvalho, F. R., & Santos, A. C. (2015). Taxonomic status of Tetragonopterus anomalus Steindachner, 1891, an inquirenda species in Characidae (Teleostei: Characiformes). Zootaxa, 4018(1), 146–150. https://doi.org/10.11646/zootaxa.4018.1.9