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DescriptionInia range map PLoS ONE.jpg
English: Distribution map of known species and subspecies of the South American river dolphin genus Inia, following the recognition of Inia araguaiaensis as a separate species.
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Image title
Distribution map of all known species and subspecies of Inia.Black outline denotes the limit of the Amazon basin. Question marks denote uncertainty as to which species occurs in the Tocantins River downstream of the Tucuruí dam which potentially delimits the distributions of I. geoffrensis and I. araguaiaensis sp. nov. Bars on the Madeira River represent a series of rapids that delimit the distribution of I. geoffrensis and I. boliviensis. The single bar on the northern limit of the Amazon basin represents the Casiquiare canal which connects the Amazon and Orinoco basins, and is thought to delimit the I. g. humboldtiana subspecies from I. g. geoffrensis.