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Boto is a Portuguese name given to several types of dolphins and river dolphins native to the Amazon and the Orinoco River tributaries. A few botos exist exclusively in fresh water, and these are often considered primitive dolphins. ==Classification== The botos are a paraphyletic group, defined largely by their evolutionary convergences. The genus ''Sotalia'' is divided into two 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 is marine and lives from Santa Catarina to the south. The Amazon river dolphin (''Inia geoffrensis'') thrives in fresh water, is endemic of the Amazon basin, and is placed in the Data Deficient category of the IUCN.〔 Database entry includes a lengthy justification of why this species is data-deficient.〕 The Araguaian river dolphin (''I. araguaiaensis'') is a newly identified species native to the Araguaia-Tocantins basin of Brazil. The La Plata dolphin (''Pontoporia blainvillei''), another vulnerable Brazilian denizen, is a marine river dolphin that ranges from Espírito Santo, Brazil, to the south.〔 Database entry includes a brief justification of why this species is of vulnerable.〕 *Suborder Odontoceti * *Superfamily Delphinoidea * * *Family Delphinidae * * * *Genus ''Sotalia'' * * * * *Species ''Sotalia fluviatilis'', tucuxi * * * * *Species ''Sotalia guianensis'', costero * * *Family Phocoenidae * * * *Genus ''Phocoena'' * * * * *Species ''Phocoena spinipinnis'', Burmeister's porpoise * *Superfamily Platanistoidea * * *Family Iniidae * * * *Genus ''Inia'' * * * * *Species ''Inia araguaiaensis'' * * * * *Species ''Inia geoffrensis'' * * * * * *Subspecies ''Inia geoffrensis geoffrensis'', Amazon river dolphin * * * * * *Subspecies ''Inia geoffrensis boliviensis'', Bolivian river dolphin * * * * * *Subspecies ''Inia geoffrensis humboldtiana'', Humboldt's river dolphin * * *Family Pontoporiidae * * * *Genus ''Pontoporia'' * * * * *Species ''Pontoporia blainvillei'', la Plata dolphin 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「boto」の詳細全文を読む スポンサード リンク
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