List of cetaceans - Wikipedia
Cetacea is an infraorder that comprises the 94 species of whales, dolphins, and porpoises. It is divided into toothed whales (Odontoceti) and baleen whales (Mysticeti), which diverged from each other in the Eocene some 50 million years ago (mya).
List of cetaceans | dolphins, whales, porpoises | Britannica
Cetaceans (order Cetacea) are an entirely aquatic order of mammals comprising the whales, the dolphins, and the porpoises. The ancient Greeks recognized that cetaceans breathe air, give birth to live young, produce milk, and have hair—all features of mammals.
Cetacean Species and Taxonomy – IUCN – SSC Cetacean …
2024年12月26日 · The Society for Marine Mammalogy’s (SMM) Committee on Taxonomy, chaired by Ana Costa (who took over from Patty Rosel in 2024), produces the official list of marine mammal species and subspecies. The IUCN Cetacean Specialist Group follows the SMM list including when identifying taxonomic units to be assessed for the Red List.
Cetacean | Life Span, Evolution, & Characteristics | Britannica
2024年12月21日 · cetacean, (order Cetacea), any member of an entirely aquatic group of mammals commonly known as whales, dolphins, and porpoises. The ancient Greeks recognized that cetaceans breathe air, give birth to live young, produce milk, and have hair—all features of …
Cetacea - Wikipedia
Cetacea (/ s ɪ ˈ t eɪ ʃ ə /; from Latin cetus 'whale', from Ancient Greek κῆτος () 'huge fish, sea monster') [3] is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins and porpoises.Key characteristics are their fully aquatic lifestyle, streamlined body shape, often large size and exclusively carnivorous diet.
Cetaceans Facts, Complete Guide To Whales, Dolphins & Porpoises
2023年8月2日 · Cetaceans are a group (Cetacea) of marine mammals comprising all whales, dolphins and porpoises. On this page you’ll find out what cetaceans are, cetacean characteristics, the different types of cetaceans, and examples of cetaceans…
Status of the World’s Cetaceans – IUCN – SSC Cetacean …
There are five cetacean species and 19 subspecies or subpopulations of cetacean that are currently classified as Critically Endangered on the IUCN Red List. The Yangtze River dolphin (Lipotes vexillifer) is classified as critically endangered and may already be functionally extinct.
List of Cetaceans - Meaning, Types And Characteristics
2024年7月30日 · Cetacean animals are lung mammals that inhabit our seas and oceans, although there are also some species live in rivers. For more, we suggest taking a look at our aquatic mammals list.
Portal:Cetaceans - Wikipedia
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, complex social behaviour, and the enormous size of some of the group's members.
Cetacean - Marine Mammals, Evolution, Classification | Britannica
2024年12月21日 · 32 species in 12 genera. Characteristics variable. Some neck vertebrae fused; dorsal fin and well-defined beak present or absent. None with expanded tooth crowns. Length 1.7 to about 9 metres. Worldwide, marine and fresh water. About 35 fossil genera, Lower Miocene to Holocene. Family Ziphiidae (beaked whales) 23 species in 6 genera.