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Cephalorhynchus
''Cephalorhynchus'' is a genus in the dolphin family Delphinidae. Extant species It consists of four species: The species have similar physical features—they are small, generally playful, blunt-nosed dolphins—but they are found in distinct geographical locations. A phylogenetic analysis by indicated the two species traditionally assigned to the genus '' Lagenorhynchus'', the hourglass dolphin The hourglass dolphin (''Lagenorhynchus cruciger'') is a small dolphin in the family Delphinidae that inhabits offshore Antarctic and sub-Antarctic waters. It is commonly seen from ships crossing the Drake Passage, but has a circumpolar distribu ... ''L. cruciger'' and Peale's dolphin ''L. australis'' are actually phylogenetically nested among the species of ''Cephalorhynchus'', and they suggest these two species should be transferred to the genus ''Cephalorhynchus''. Some acoustic and morphological data support this arrangement, at least with respect to Peale's dolphin. Acco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalorhynchus Heavisidii
Heaviside's dolphin (''Cephalorhynchus heavisidii'') is one of four dolphins in the genus ''Cephalorhynchus''. The small cetacean is endemic to the Benguela ecosystem along the southwest coast of Africa. Taxonomy and evolution Nomenclature Early in the 19th century, a specimen was caught off the Cape of Good Hope and brought to the United Kingdom by a Captain Haviside of the British East India Company. Zoologist John Edward Gray, who described the species in his Spicilegia Zoologica, misidentified Haviside as the surgeon John Heaviside, whom was known for his own biological collections at the time. "Heaviside's Dolphin" is the recognised common name, though amongst others, "Haviside's dolphin" and "Benguela dolphin" are also used, the latter especially in Namibia. The genus name "Cephalorhynchus" comes from the Greek kephale for ‘head’ and rhynchos for ‘beak’. For the species name "heavisidii" see the above description. Closely related species and genetic origin The t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heaviside's Dolphin
Heaviside's dolphin (''Cephalorhynchus heavisidii'') is one of four dolphins in the genus '' Cephalorhynchus''. The small cetacean is endemic to the Benguela ecosystem along the southwest coast of Africa. Taxonomy and evolution Nomenclature Early in the 19th century, a specimen was caught off the Cape of Good Hope and brought to the United Kingdom by a Captain Haviside of the British East India Company. Zoologist John Edward Gray, who described the species in his Spicilegia Zoologica, misidentified Haviside as the surgeon John Heaviside, whom was known for his own biological collections at the time. "Heaviside's Dolphin" is the recognised common name, though amongst others, "Haviside's dolphin" and "Benguela dolphin" are also used, the latter especially in Namibia. The genus name "Cephalorhynchus" comes from the Greek kephale for ‘head’ and rhynchos for ‘beak’. For the species name "heavisidii" see the above description. Closely related species and genetic origi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hector's Dolphin
Hector's dolphin (''Cephalorhynchus hectori'') is one of four dolphin species belonging to the genus ''Cephalorhynchus''. Hector's dolphin is the only cetacean endemic to New Zealand, and comprises two subspecies: ''C. h. hectori'', the more numerous subspecies, also referred to as South Island Hector's dolphin; and the critically endangered Māui dolphin (''C. h. maui''), found off the West Coast of the North Island. Etymology Hector's dolphin was named after Sir James Hector (1834–1907), who was the curator of the Colonial Museum in Wellington (now the Museum of New Zealand Te Papa Tongarewa). He examined the first specimen of the dolphin found by cephologists. The species was scientifically described by Belgian zoologist Pierre-Joseph van Beneden in 1881. Māori names for Hector's and Māui dolphin include ''tutumairekurai, tupoupou'' and ''popoto''. Description Hector's dolphin is the smallest dolphin species. Mature adults have a total length of and weigh .Slooten, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commerson's Dolphin
Commerson's dolphin (''Cephalorhynchus commersonii''), also referred to by the common names jacobita, skunk dolphin, piebald dolphin, panda dolphin, or tonina overa (in South America), is a small oceanic dolphin of the genus ''Cephalorhynchus''. Commerson's dolphin has two geographically-isolated but locally-common subspecies. The principal subspecies, ''C.c.commersonii'', has sharply-delineated black-and-white patterning and is found around the tip of South America. The secondary subspecies, ''C.c.kerguelenensis'', is larger than ''C.c.commersonii'', has a less-sharply delineated dark and light grey patterning with a white ventral band, and is found around the Kerguelen Islands in the Indian Ocean. The dolphin is named after French naturalist Dr Philibert Commerson, who first described them in 1767 after sighting them in the Strait of Magellan. Population and distribution Two disjunct subspecies of the dolphin are found in geographically disparate areas separated by 130° of l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oceanic Dolphins
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 Globicephalinae (round-headed whales including the orca and pilot whale). Delphinidae is a family within the superfamily Delphinoidea, which also includes the porpoises (Phocoenidae) and the Monodontidae (beluga whale and narwhal). River dolphins are relatives of the Delphinoidea. Oceanic dolphins range in size from the and Maui's dolphin to the and orca, the largest known dolphin. Several species exhibit sexual dimorphism; the males are larger than females. They have streamlined bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, some dolphins can travel at speeds 29 km/h (18 mph) for short distances. Most delphinids primarily eat fish, along with a smaller number of squid and small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Globicephalinae (round-headed whales including the orca and pilot whale). Delphinidae is a family within the superfamily Delphinoidea, which also includes the porpoises (Phocoenidae) and the Monodontidae (beluga whale and narwhal). River dolphins are relatives of the Delphinoidea. Oceanic dolphins range in size from the and Maui's dolphin to the and orca, the largest known dolphin. Several species exhibit sexual dimorphism; the males are larger than females. They have streamlined bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, some dolphins can travel at speeds 29 km/h (18 mph) for short distances. Most delphinids primarily eat fish, along with a smaller number of squid an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalorhynchus
''Cephalorhynchus'' is a genus in the dolphin family Delphinidae. Extant species It consists of four species: The species have similar physical features—they are small, generally playful, blunt-nosed dolphins—but they are found in distinct geographical locations. A phylogenetic analysis by indicated the two species traditionally assigned to the genus '' Lagenorhynchus'', the hourglass dolphin The hourglass dolphin (''Lagenorhynchus cruciger'') is a small dolphin in the family Delphinidae that inhabits offshore Antarctic and sub-Antarctic waters. It is commonly seen from ships crossing the Drake Passage, but has a circumpolar distribu ... ''L. cruciger'' and Peale's dolphin ''L. australis'' are actually phylogenetically nested among the species of ''Cephalorhynchus'', and they suggest these two species should be transferred to the genus ''Cephalorhynchus''. Some acoustic and morphological data support this arrangement, at least with respect to Peale's dolphin. Acco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lagenorhynchus
''Lagenorhynchus'' is a genus of oceanic dolphins in the infraorder Cetacea, presently containing six extant species. However, there is consistent molecular evidence that the genus is polyphyletic and several of the species are likely to be moved to other genera. In addition, the extinct species '' Lagenorhynchus harmatuki'' is also classified in this genus. Etymology The name ''Lagenorhynchus'' derives from the Greek ''lagenos'' meaning "bottle" and ''rhynchus'' meaning "beak". Indeed, the "bottle-nose" is a characteristic of this genus. However, the dolphins popularly called bottlenose dolphins belong in the genus ''Tursiops''. Taxonomy There is compelling evidence from molecular phylogeny that the genus ''Lagenorhynchus'' is polyphyletic, meaning that it currently contains several species that are not closely related. found that the white-beaked and Atlantic white-sided dolphins are phylogenetically isolated within the Delphinidae, where they are believed to be rather ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chilean Dolphin
The Chilean dolphin (''Cephalorhynchus eutropia''), also known as the black dolphin, is one of four dolphins in the genus '' Cephalorhynchus''. The dolphin is found only off the coast of Chile; it is commonly referred to in the country as ''tonina''. Physical description The Chilean dolphin is small at around in length, with a blunt head. These characteristics often make for its incorrect identification as a porpoise. This dolphin is thickly shaped with its girth up to two-thirds its length. The dorsal fin and flippers are small in proportion to body size in comparison with other dolphins. The throat, underside, and the closest part of the flippers to the body are white. The remainder of the body is a mix of greys. It has 28–34 pairs of teeth in the upper jaw and 29–33 in the lower. The Chilean dolphin is normally sighted in small groups of around two to 10 individuals, with some larger gatherings occasionally sighted. Longevity, gestation, and lactation periods are not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peale's Dolphin
Peale's dolphin (''Lagenorhynchus australis'') is a small dolphin found in the waters around Tierra del Fuego at the foot of South America. It is also commonly known as the black-chinned dolphin or even Peale's black-chinned dolphin. However, since Rice's work Peale's dolphin has been adopted as the standard common name. Taxonomy Though it is traditionally placed in the genus ''Lagenorhynchus'', recent molecular analyses indicate Peale's dolphin is actually more closely related to the dolphins of the genus ''Cephalorhynchus''. If true, this would mean this species must either be transferred to ''Cephalorhynchus'' or be given a new genus of its own. An alternate genus proposed for this species (as well as the Pacific white-sided dolphin, hourglass dolphin and dusky dolphin is the resurrected genus ''Sagmatias''. Some behavioral and morphological data support moving Peale's dolphin to ''Cephalorhynchus''. According to , Peale's dolphin and the ''Cephalorhynchus'' species are the o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hourglass Dolphin
The hourglass dolphin (''Lagenorhynchus cruciger'') is a small dolphin in the family Delphinidae that inhabits offshore Antarctic and sub-Antarctic waters. It is commonly seen from ships crossing the Drake Passage, but has a circumpolar distribution. The species was identified as a new species by Jean René Constant Quoy and Joseph Paul Gaimard in 1824 from a drawing made in the South Pacific in 1820. It is the only cetacean to have been widely accepted as a species solely on witness accounts. Description The hourglass dolphin is colored black on top and white on the belly, with white patches on the sides and sometimes variations of dark grey. For this reason, it was colloquially known by whalers as a "sea cow" (although it does not belong to the taxonomic order Sirenia) or "sea skunk". Each flank has a white patch at the front, above the beak, eye and flipper, and a second patch at the rear. These two patches are connected by a thin white strip, creating, loosely speaking, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commerson Dolphin Closer
Philibert Commerson (; 18 November 1727 – 14 March 1773), sometimes spelled Commerçon by contemporaries, was a French naturalist, best known for accompanying Louis Antoine de Bougainville on his voyage of circumnavigation in 1766–1769. Biography Commerson was born at Châtillon-les-Dombes in France. He studied in Montpellier, and for a time was a practicing physician. He was in contact with Carl Linnaeus, who encouraged him to study fish of the Mediterranean. Commerson returned to live at Châtillon-les-Dombes, where he occupied himself in creating a botanical garden in 1758. After the death of his wife in 1764, he moved to Paris. In 1766, Commerson joined Bougainville on his voyage of circumnavigation after being recommended for the position of naturalist by the Paris Academy of Sciences. He had previously drawn up an extensive programme of nature studies for the Marine Ministry, in which he elaborated the "three natural kingdoms" which a naturalist should investig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
