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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 recognized to be a unique taxon. A 1998 classification listed a single species, ''Inia geoffrensis'', in the genus ''Inia'', with three recognized subspecies. Most of the scientific community accepted this single species classification, as does the IUCN. As of 2016 the Committee on Taxonomy of the Society for Marine Mammalogy considers the genus ''Inia'' to contain one species with only two subspecies: the Bolivian (''I. g. boliviensis'') and the Amazon (''I. g. geoffrensis)'' subspecies. In 2014, the population in the Araguaia-Tocantins basin was proposed to define an additional species, ''Inia araguaiaensis'', but this remains debated. The American Society of Mammalogists recognizes the highest number of species at four, although this i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 dolphin), ''I. g. boliviensis'' (Bolivian river dolphin) and ''I. g. humboldtiana'' (Orinoco river dolphin) while position of Araguaian river dolphin (''I. araguaiaensis'') within the clade is still unclear. The three subspecies are distributed in the Amazon basin, the upper Madeira River in Bolivia, and the Orinoco basin, respectively. The Amazon river dolphin is the largest species of river dolphin, with adult males reaching in weight, and in length. Adults acquire a pink color, more prominent in males, giving it its nickname "pink river dolphin". Sexual dimorphism is very evident, with males measuring 16% longer and weighing 55% more than females. Like other toothed whales, they have a melon, an organ that is used for bio sonar. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inia Humboldtiana
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 dolphin), ''I. g. boliviensis'' (Bolivian river dolphin) and ''I. g. humboldtiana'' (Orinoco river dolphin) while position of Araguaian river dolphin (''I. araguaiaensis'') within the clade is still unclear. The three subspecies are distributed in the Amazon basin, the upper Madeira River in Bolivia, and the Orinoco basin, respectively. The Amazon river dolphin is the largest species of river dolphin, with adult males reaching in weight, and in length. Adults acquire a pink color, more prominent in males, giving it its nickname "pink river dolphin". Sexual dimorphism is very evident, with males measuring 16% longer and weighing 55% more than females. Like other toothed whales, they have a melon, an organ that is used for bio sonar. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 river dolphin), ''I. g. boliviensis'' (Bolivian river dolphin) and ''I. g. humboldtiana'' (Orinoco river dolphin) while position of Araguaian river dolphin (''I. araguaiaensis'') within the clade is still unclear. The three subspecies are distributed in the Amazon basin, the upper Madeira River in Bolivia, and the Orinoco basin, respectively. The Amazon river dolphin is the largest species of river dolphin, with adult males reaching in weight, and in length. Adults acquire a pink color, more prominent in males, giving it its nickname "pink river dolphin". Sexual dimorphism is very evident, with males measuring 16% longer and weighing 55% more than females. Like other toothed whales, they have a melon, an organ that is used for bio sonar. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orinoco 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 dolphin), ''I. g. boliviensis'' (Bolivian river dolphin) and ''I. g. humboldtiana'' (Orinoco river dolphin) while position of Araguaian river dolphin (''I. araguaiaensis'') within the clade is still unclear. The three subspecies are distributed in the Amazon basin, the upper Madeira River in Bolivia, and the Orinoco basin, respectively. The Amazon river dolphin is the largest species of river dolphin, with adult males reaching in weight, and in length. Adults acquire a pink color, more prominent in males, giving it its nickname "pink river dolphin". Sexual dimorphism is very evident, with males measuring 16% longer and weighing 55% more than females. Like other toothed whales, they have a melon, an organ that is used for bio sonar. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolivian River Dolphin
The Bolivian river dolphin (''Inia boliviensis'') is a species of the genus ''Inia''. Taxonomy Bolivian river dolphins were discovered by the Western world in 1832 by French researcher Alcide d'Orbigny. The Bolivian river dolphin was briefly thought to be a subspecies (as ''I. geoffrensis boliviensis)'' of the Amazonian river dolphin, ''Inia geoffrensis'', but differences in body structure and the isolation of the Bolivian river dolphin led to it being classified as its own species in 2012. In a study conducted in 2015, it was also noted that any gene flow between ''I. geoffrensis'' (downstream) and ''I. boliviensis'' (upstream) would be a one way path flowing from upstream to downstream due to the Teotônio waterfall between them. Despite any gene flow, these populations would also remain morphologically different from each other due to the differences in the environment in which they reside. Differences in seasonal water depth and speed would result in morphologically different ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 recognized to be a unique taxon. A 1998 classification listed a single species, ''Inia geoffrensis'', in the genus ''Inia'', with three recognized subspecies. Most of the scientific community accepted this single species classification, as does the IUCN. As of 2016 the Committee on Taxonomy of the Society for Marine Mammalogy considers the genus ''Inia'' to contain one species with only two subspecies: the Bolivian (''I. g. boliviensis'') and the Amazon (''I. g. geoffrensis)'' subspecies. In 2014, the population in the Araguaia-Tocantins basin was proposed to define an additional species, ''Inia araguaiaensis'', but this remains debated. The American Society of Mammalogists recognizes the highest number of species at four, although this i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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'' as a distinct species is still debated. It was originally distinguished from the Amazon river dolphin (''Inia geoffrensis'') in January 2014 on the basis of nuclear microsatellite and mitochondrial DNA data as well as differences in skull morphology (it generally has a wider skull). It also differs from the Amazon and Bolivian river dolphins in the number of teeth per hemimandible (24–28 versus 25–29 and 31–35, respectively). However, ''I. araguaiaensis'' is still not recognized as a separate species by the Committee on Taxonomy of the Society for Marine Mammalogy, the largest international association of marine mammal scientists in the world. The Committee made these comments regarding the decision to not include ''I. araguaiaensis' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 river dolphins are placed in two superfamilies, Platanistoidea and Inioidea. They comprise the families Platanistidae (the South Asian dolphins), the recently extinct Lipotidae (Yangtze river dolphin), Iniidae (the Amazonian dolphins) and Pontoporiidae. There are five extant species of river dolphins. River dolphins, alongside other cetaceans, belong to the clade Artiodactyla, with even-toed ungulates, and their closest living relatives the hippopotamuses, from which they diverged about 40 million years ago. Specific types of Dolphins can be pink. River dolphins are relatively small compared to other dolphins, having evolved to survive in warm, shallow water and strong river currents. They range in size from the long South Asian river dolp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Dolphins
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 river dolphins are placed in two superfamilies, Platanistoidea and Inioidea. They comprise the families Platanistidae (the South Asian dolphins), the recently extinct Lipotidae (Yangtze river dolphin), Iniidae (the Amazonian dolphins) and Pontoporiidae. There are five extant species of river dolphins. River dolphins, alongside other cetaceans, belong to the clade Artiodactyla, with even-toed ungulates, and their closest living relatives the hippopotamuses, from which they diverged about 40 million years ago. Specific types of Dolphins can be pink. River dolphins are relatively small compared to other dolphins, having evolved to survive in warm, shallow water and strong river currents. They range in size from the long South Asian river dolp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boto Skull (Inia Spp)
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 to the Amazon basin, and is placed in the Endangered 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 n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammals Of South America
This is a list of the native wild mammal species recorded in South America. South America's terrestrial mammals fall into three distinct groups: "old-timers", African immigrants and recent North American immigrants. The marsupials and xenarthrans are "old-timers", their ancestors having been present on the continent since at least the very early Cenozoic Era. During the early Cenozoic, South America's only land connection was to Antarctica, so it was effectively cut off from most of the world; as the fragments of Gondwana continued to separate, this connection was lost, leaving South America an island continent. Caviomorph rodents and monkeys arrived as "waif dispersers" by rafting across the Atlantic from Africa in the Eocene epoch, 35 million or more years ago. All the remaining nonflying mammals of South America are recent arrivals, having migrated from North America via Central America during the past seven million years as part of the Great American Interchange; this invasion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cetacean Genera
Cetacea (; , ) is an infraorder of aquatic mammals that includes whales, dolphins, and porpoises. Key characteristics are their fully aquatic lifestyle, streamlined body shape, often large size and exclusively carnivorous diet. They propel themselves through the water with powerful up-and-down movement of their tail which ends in a paddle-like fluke, using their flipper-shaped forelimbs to maneuver. While the majority of cetaceans live in marine environments, a small number exclusively reside in brackish water or fresh water. Having a cosmopolitan distribution, they can be found in some rivers and all of Earth's oceans, and many species inhabit vast ranges where they migrate with the changing of the seasons. Cetaceans are famous for their high intelligence and complex social behaviour as well as for the enormous size of some of the group's members, such as the blue whale which reaches a maximum confirmed length of 29.9 meters (98 feet) and a weight of 173 tonnes (190 short tons) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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