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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''., 2019 Superfamily Delphinoidea :Family †Albireonidae :::Genus ''Albireo'' :Family Delphinidae :: Subfamily Delphininae ::: Genus ''Delphinus'' ::: Genus '' Lagenodelphis'' ::: Genus ''Sotalia'' :::Genus '' Sousa'' ::: Genus '' Stenella'' ::: Genus '' Tursiops'' :: Subfamily Globicephalinae ::: Genus †'' Astadelphis'' ::: Genus '' Feresa'' ::: Genus '' Globicephala'' ::: Genus ''Grampus'' ::: Genus ''Orcaella'' ::: Genus '' Peponocephala'' ::: Genus ''Pseudorca'' ::: Genus '' Steno'' ::Subfamily Lissodelphininae ::: Genus ''Cephalorhynchus'' ::: Genus '' Lissodelphis'' :: Subfamily Orcininae ::: Genus †'' Arimidelphis'' ::: Genus †''Eodelphinus'' ::: Genus †''Hemisyntrachelus'' ::: Genus ''Orcinus'' :: Subfamily incertae sedis ::: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delphininae
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 sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eodelphinus
''Eodelphinus'' is an extinct genus of oceanic dolphins belonging to the family Delphinidae. Description ''Eodelphinus'' differs from all other delphinids by having a medially positioned premaxillary foramen, a partially transversely directed suture line between the palatine and pterygoid on the palate, and prominently long and ventrolaterally extended posterior process of the periotic with the attenuating posterior bullar facet. It possesses a wide ascending process of the left premaxilla relative to the right premaxilla at level of the middle of the external nares as in the killer whale and ''Hemisyntrachelus''. Taxonomy ''Eodelphinus'' was originally described in 1977 as a new species of '' Stenella'', ''S. kabatensis'', from a partial skull found in marine deposits in Hokkaido, Japan. Later, Ichisima (2005) questioned the attribution of ''S. kabatensis'' to ''Stenella'', stressing the need for re-assessment of the taxon. Subsequent study by Mizuki Murakami and colleagues publ ... [...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 and small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lissodelphininae
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] |
Toothed Whale
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 of toothed whales are described. They are one of two living groups of cetaceans, the other being the baleen whales (Mysticeti), which have baleen instead of teeth. The two groups are thought to have diverged around 34 million years ago (mya). Toothed whales range in size from the and vaquita to the and sperm whale. Several species of odontocetes exhibit sexual dimorphism, in that there are size or other morphological differences between females and males. They have streamlined bodies and two limbs that are modified into flippers. Some can travel at up to 20 knots. Odontocetes have conical teeth designed for catching fish or squid. They have well-developed hearing, that is well adapted for both air and water, so much so that some can surviv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albireonidae
Albireonidae is a monotypic group of extinct porpoise-like whales containing the single genus ''Albireo Albireo is a double star designated Beta Cygni (β Cygni, abbreviated Beta Cyg, β Cyg). The International Astronomical Union uses the name "Albireo" specifically for the brightest star in the system. Although designated ' beta', ...''. These medium-sized, fossil dolphins are very rare and known only from temperate latitudes around the margin of the eastern North Pacific Ocean. References Toothed whales {{paleo-whale-stub ... [...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 ''L. cruciger'' and 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, si ... ''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. Accord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudorca
''Pseudorca'' is a genus of cetacea 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 them ...ns with three members which include '' Pseudorca yokoyamai'', '' Pseudorca yuanliensis'' and '' Pseudorca crassidens'', of which ''P. crassidens'' (commonly known as the false killer whale) is the only extant member. ''Pseudorca Crassidens'' travel in pods of 10-20 but may belong to larger schools around 100 and more ''Pseudorca yuanliensis'' is found in Pliocene layers in Yuanli, Taiwan, while ''Pseudorca yokoyamai'' is found in both Pliocene and Pleistocene rocks in Japan. References Oceanic dolphins Cetacean genera Mammal genera with one living species Taxa named by Johannes Theodor Reinhardt {{Cetacean-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steno (genus)
Steno may refer to: * Steno, Salamis, a small community at the northwest of Salamis Island, Greece * Stenography, the process of writing in shorthand ** Stenotype, a specialized chorded keyboard or typewriter used by stenographers for shorthand use ** Stenographer or Stenotypist or Steno, a specialized person for using a Stenotype machine * Steno-typist, a combination of ''typist'' and ''stenographer'' * ''Stenotrophomonas maltophilia'' (Steno), a bacterium which causes uncommon, but difficult to treat, infections in humans * ''Steno'' (genus), the monotypic genus of the rough-toothed dolphin * Steno Diabetes Center, a research and teaching hospital in Gentofte, Denmark Craters * Steno (lunar crater) * Steno (Martian crater) * Steno-Apollo, a lunar crater originally named Steno People * Nicolas Steno (1638–1686), pioneer in anatomy and geology * Stefano Vanzina (aka Steno) (1915–1988), Italian movie director See also * Sterno Sterno is a brand of jellied, denatured al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligocene
The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain. The name Oligocene was coined in 1854 by the German paleontologist Heinrich Ernst Beyrich from his studies of marine beds in Belgium and Germany. The name comes from the Ancient Greek (''olígos'', "few") and (''kainós'', "new"), and refers to the sparsity of extant forms of molluscs. The Oligocene is preceded by the Eocene Epoch and is followed by the Miocene Epoch. The Oligocene is the third and final epoch of the Paleogene Period. The Oligocene is often considered an important time of transition, a link between the archaic world of the tropical Eocene and the more modern ecosystems of the Miocene. Major changes during the Oligocene included a global expansion o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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