Figure S1. The Bayesian tree based on the mitochondrial DNA control region. Numbers associate with nodes represent posterior probabilities from Bayesian Markov chain Monte Carlo searches conducted in MRBAYES. Haplotype frequencies are indicated to the right of the tree. CO, Colombian Orinoco; CA, Colombian Amazon; MM, Mamirauá-Brazil; TF, Tefé-Brazil; BA, Bolivian Amazon.

Table S1.Inia sp. individuals used in the present study. Sampling regions in Brazil, collection dates, and genetically and morphologically indentified sex. Positive signs indicates successful amplifications for each molecular marker. The GenBank accession numbers of haplotypes compared in the study are also shown.

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