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S. S. Fig, Maximum-likelihood tree of CO1 haplotypes in the Indian-Ocean blue-spotted maskray sub-group (Neotrygon spp.), rooted by N. westpapuensis. Nucleotide sequences were trimmed to a single core length of 638 bp and the dataset (63 sequences) was analyzed under MEGA6. The substitution model was K2+G. Numbers at a node are bootstrap scores, from 600 bootstrap resampling runs under MEGA6. Neotrygon indica sp. nov. specimens from India are labelled " (I) " ; specimens from Tanzania are labelled

S. S. Fig, Maximum-likelihood tree of cytochrome-b haplotypes in the Indian-Ocean blue-spotted maskray sub-group (Neotrygon spp.), rooted by N. westpapuensis. Nucleotide sequences were trimmed to a single core length of 795 bp and the dataset (58 sequences) was analyzed under MEGA6. The substitution model was TN93+G. Numbers at a node are bootstrap scores, from 600 bootstrap resampling runs under MEGA6. Neotrygon indica sp. nov. specimens from India are labelled " (I) " ; specimens from Tanzania are labelled

S. S. Fig, Neotrygon indica sp. nov. X-ray photograph of holotype, used for the count of pectoral-fin radials. Supplementary Fig. S Neotrygon indica sp. nov. X-ray photograph of paratype, used for the count of pectoral-fin radials

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