Bernal, M. A., and L. A. Rocha. “Acanthurus Tractus Poey, 1860, a Valid Western Atlantic Species of Surgeonfish (Teleostei, Acanthuridae), Distinct from Acanthurus Bahianus Castelnau, 1855”. Zootaxa, vol. 2905, no. 1, June 2011, pp. 63–68, doi:10.11646/zootaxa.2905.1.5.