Boto is a Portuguese name given to several types of dolphin and river dolphin native to the Amazon and the Orinoco river tributaries. A few botos exist exclusively in freshwater, and these are often considered primitive dolphins. Classification [edit ]
The botos are a
paraphyletic group, defined largely by their evolutionary convergences.
is divided into two Sotalia species. The costero ( S. guianensis) is distributed in the Atlantic, from Florianópolis in Santa Catarina, Brazil and northwards. The tucuxi ( S. fluviatilis) lives in the rivers of the Amazon. Burmeister's porpoise spinipinnis ) is marine and lives from Santa Catarina to the south.
Amazon river dolphin ( Inia geoffrensis) thrives in fresh water, are endemic of the Amazon basin, and are placed in the Data Deficient category of the IUCN. [1 ]
Araguaian river dolphin ( Inia araguaiaensis) is a newly identified species. It is native to the Araguaia- Tocantins basin of Brazil. [2 ]
La Plata dolphin ( Pontoporia blainvillei), another vulnerable Brazilian denizen, is a marine river dolphin that ranges from Espírito Santo, Brazil, to the south. [3 ] References [edit ] ^ Reeves, R.R., Jefferson, T.A., Karczmarski, L., Laidre, K., O’Corry-Crowe, G., Rojas-Bracho, L., Secchi, E.R., Slooten, E., Smith, B.D., Wang, J.Y. & Zhou, K. (2011). ". Inia geoffrensis" . IUCN Red List of Threatened Species. Version 2012.2 International Union for Conservation of Nature . Retrieved 18 January 2013. Database entry includes a lengthy justification of why this species is data-deficient. ^ Hrbek, Tomas; Da Silva, Vera Maria Ferreira; Dutra, Nicole; Gravena, Waleska; Martin, Anthony R.; Farias, Izeni Pires (2014-01-22). "A New Species of River Dolphin from Brazil or: How Little Do We Know Our Biodiversity". In Turvey, Samuel T. PLOS ONE 9: e83623. doi: 10.1371/journal.pone.0083623. ^ Reeves, R., Dalebout, M., Jefferson, T.A., Karkzmarski, L., Laidre, K., O’Corry-Crowe, G., Rojas-Bracho, L., Secchi, E., Slooten, E., Smith, B.D., Wang, J.Y. , Zerbini, A.N. & Zhou, K. (2012). ". Pontoporia blainvillei" . IUCN Red List of Threatened Species. Version 2012.2 International Union for Conservation of Nature . Retrieved 18 January 2013. Database entry includes a brief justification of why this species is of vulnerable.