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Bolivian river dolphins were discovered by the Western world in 1832 by French researcher Alcide d'Orbigny. [2] 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. [3]
Inia spp. skull 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 . D'Orbigny also described Inia boliviensis as type species of the genus. [ 2 ]
Inia geoffrensis; Inia humboldtiana; Inia boliviensis; are three separate species, while many consider I. geoffrensis and I. boliviensis to be the only two. [8] [9] [3] Martin in 2004 found supporting evidence that genetic exchange occurs between multiple sites on the Amazon, even places hundreds of kilometres apart. [citation needed]
In 2012 the Society for Marine Mammalogy began considering the Bolivian (Inia geoffrensis boliviensis) and Amazonian (Inia geoffrensis geoffrensis) subspecies as full species Inia boliviensis and Inia geoffrensis, respectively; however, much of the scientific community, including the IUCN, continue to consider the Bolivian population to be a ...
The Amazon river dolphin (Inia geoffrensis), also known as the boto, bufeo or pink river dolphin, is a species of toothed whale endemic to South America and is 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 ...
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 [2] [3] on the basis of nuclear microsatellite and mitochondrial DNA data as well as differences in skull morphology (it generally has a wider skull).
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 ...
The family Balaenidae, the right whales, contains two genera and four species. All right whales have no ventral grooves; a distinctive head shape with a strongly arched, narrow rostrum, bowed lower jaw; lower lips that enfold the sides and front of the rostrum; and long, narrow, elastic baleen plates (up to nine times longer than wide) with fine baleen fringes.