Boto is a

Portuguese Portuguese may refer to: * anything of, from, or related to the country and nation of Portugal ** Portuguese cuisine, traditional foods ** Portuguese language, a Romance language *** Portuguese dialects, variants of the Portuguese language ** Portu ...

name given to several types of

dolphin A dolphin is an aquatic mammal within the infraorder Cetacea. Dolphin species belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the b ...

s and

river dolphin River dolphins are a polyphyletic group of fully aquatic mammals that reside exclusively in freshwater or brackish water. They are an informal grouping of dolphins, which itself is a paraphyletic group within the infraorder Cetacea. Extant riv ...

s native to the

Amazon Amazon most often refers to: * Amazons, a tribe of female warriors in Greek mythology * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon River, in South America * Amazon (company), an American multinational technolog ...

and the

Orinoco The Orinoco () is one of the longest rivers in South America at . Its drainage basin, sometimes known as the Orinoquia, covers , with 76.3 percent of it in Venezuela and the remainder in Colombia. It is the fourth largest river in the wor ...

River tributaries. A few botos exist exclusively in

fresh water Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does incl ...

, and these are often considered primitive dolphins.

Classification

The botos are a

paraphyletic In taxonomy, a group is paraphyletic if it consists of the group's last common ancestor and most of its descendants, excluding a few monophyletic subgroups. The group is said to be paraphyletic ''with respect to'' the excluded subgroups. In ...

group, defined largely by their evolutionary convergences. The genus ''

Sotalia The dolphin genus ''Sotalia'' is considered to have two member species with the classification of '' Sotalia guianensis'' as a distinct species from '' Sotalia fluviatilis'' in 2007. This was a result of recent morphometric analyses, as well as mi ...

'' is divided into two

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriat ...

. The

costero The Guiana dolphin (''Sotalia guianensis''), also known as the estuarine dolphin or costero, is a dolphin found in the coastal waters to the north and east of South America, and east of Central America. It is a member of the oceanic dolphin fam ...

(''S. guianensis'') is distributed in the Atlantic, from

Florianópolis Florianópolis () is the capital and second largest city of the state of Santa Catarina, in the South region of Brazil. The city encompasses Santa Catarina Island and surrounding small islands, as well as part of the mainland. It has a populat ...

Santa Catarina, Brazil Santa Catarina (, ) is a state in the South Region of Brazil. It is the 7th smallest state in total area and the 11th most populous. Additionally, it is the 9th largest settlement, with 295 municipalities. The state, with 3.4% of the Brazili ...

, and northwards. The tucuxi (''S. fluviatilis'') lives in the

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of ...

s of the Amazon.

Burmeister's porpoise Burmeister's porpoise (''Phocoena spinipinnis'') is a species of porpoise endemic to the coast of South America. It was first described by Hermann Burmeister, for whom the species is named, in 1865. Locally it is known as ''marsopa espinosa'' ( ...

is marine and lives from Santa Catarina to the south. The

Amazon river dolphin The Amazon river dolphin (''Inia geoffrensis''), also known as the boto, bufeo or pink river dolphin, is a species of toothed whale classified in the family Iniidae. Three subspecies are currently recognized: ''I. g. geoffrensis'' (Amazon river ...

(''Inia geoffrensis'') thrives in fresh water, is endemic to the Amazon basin, and is placed in the

Endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...

category of the IUCN. Database entry includes a lengthy justification of why this species is data-deficient. The

Araguaian river dolphin The Araguaian river dolphin or Araguaian boto (''Inia araguaiaensis'') is a South American river dolphin population native to the Araguaia–Tocantins basin of Brazil. Discovery and species recognition The recognition of ''I. araguaiaensis'' ...

(''I. araguaiaensis'') is a newly identified species native to the Araguaia-

Tocantins Tocantins () is one of the 26 states of Brazil. It is the newest state, formed in 1988 and encompassing what had formerly been the northern two-fifths of the state of Goiás. Tocantins covers and had an estimated population of 1,496,880 in 20 ...

basin of

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

. The

La Plata dolphin The La Plata dolphin, franciscana or toninha (''Pontoporia blainvillei'') is a species of dolphin found in coastal Atlantic waters of southeastern South America. It is a member of the river dolphin group and the only one that lives in the ocea ...

(''Pontoporia blainvillei''), another vulnerable Brazilian denizen, is a

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military ...

river dolphin that ranges from

Espírito Santo Espírito Santo (, , ; ) is a state in southeastern Brazil. Its capital is Vitória, and its largest city is Serra. With an extensive coastline, the state hosts some of the country's main ports, and its beaches are significant tourist attra ...

, Brazil, to the south. Database entry includes a brief justification of why this species is of vulnerable. *Suborder

Odontoceti The toothed whales (also called odontocetes, systematic name Odontoceti) are a parvorder of cetaceans that includes dolphins, porpoises, and all other whales possessing teeth, such as the beaked whales and sperm whales. Seventy-three species ...

**Superfamily

Delphinoidea Delphinoidea is the largest group of toothed whales with 66 genera in 6 families. The largest living member of the superfamily is the killer whale, which can reach 6 tons, while the smallest is the vaquita. Taxonomy Based on McGowen ''et al''., ...

***Family

Delphinidae Oceanic dolphins or Delphinidae are a widely distributed family of dolphins that live in the sea. Close to forty extant species are recognised. They include several big species whose common names contain "whale" rather than "dolphin", such as the ...

****Genus ''

'' *****Species ''

Sotalia fluviatilis The tucuxi (''Sotalia fluviatilis''), alternatively known in Peru ''bufeo gris'' or ''bufeo negro'', is a species of freshwater dolphin found in the rivers of the Amazon basin. The word ''tucuxi'' is derived from the Tupi language word ''tuchuc ...

'', tucuxi *****Species ''

Sotalia guianensis The Guiana dolphin (''Sotalia guianensis''), also known as the estuarine dolphin or costero, is a dolphin found in the coastal waters to the north and east of South America, and east of Central America. It is a member of the oceanic dolphin fam ...

'', costero ***Family Phocoenidae ****Genus '' Phocoena'' *****Species '' Phocoena spinipinnis'', Burmeister's porpoise **Superfamily

Platanistoidea River dolphins are a polyphyletic group of fully aquatic mammals that reside exclusively in freshwater or brackish water. They are an informal grouping of dolphins, which itself is a paraphyletic group within the infraorder Cetacea. Extant riv ...

***Family

Iniidae Iniidae is a family of river dolphins containing one living genus, ''Inia'', and four extinct genera. The extant genus inhabits the river basins of South America, but the family formerly had a wider presence across the Atlantic Ocean. Iniida ...

****Genus ''

Inia ''Inia'' is a genus of river dolphins from South America containing one to four species. Taxonomy The genus was described by Alcide d'Orbigny in 1834 when ''Delphinus geoffrensis'', described by Henri Marie Ducrotay de Blainville in 1817, was ...

'' *****Species '' Inia araguaiaensis'' *****Species ''

Inia geoffrensis The Amazon river dolphin (''Inia geoffrensis''), also known as the boto, bufeo or pink river dolphin, is a species of toothed whale classified in the family Iniidae. Three subspecies are currently recognized: ''I. g. geoffrensis'' (Amazon rive ...

'' ******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

Folklore

The 'boto' of the Amazon River regions of northern

, are described according to local lore as taking the form of a human or

merman Mermen, the male counterparts of the mythical female mermaids, are legendary creatures, which are male human from the waist up and fish-like from the waist down, but may assume normal human shape. Sometimes they are described as hideous and other ...

, also known as ''Boto-cor-de-rosa'' ("Pink-Boto" in

) and with the habit of seducing human women and impregnating them.Juliette Wood

References

{{Reflist Mammals of Brazil River dolphins Mammal common names