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Imagotaria is an example of a primitive walrus that does not grossly appear similar to a modern walrus. However, the walrus family (the Odobenidae ) is a more inclusive group, that includes walruses without tusks (e.g. Imagotaria ), walruses with upper and lower tusks (the subfamily Dusignathinae ), and walruses with upper tusks like the extant ...
Pinnipedia is an infraorder of mammals in the order Carnivora, composed of seals, sea lions, and the walrus. A member of this group is called a pinniped or a seal. [a] They are widespread throughout the ocean and some larger lakes, primarily in colder waters.
Sea lion attacks on humans are rare, but when humans come within approximately 2.5 meters (8 ft), it can be very unsafe. [26] In a highly unusual attack in 2007 in Western Australia, a sea lion leapt from the water and seriously mauled a 13-year-old girl surfing behind a speedboat. The sea lion appeared to be preparing for a second attack when ...
An eared seal, otariid, or otary is any member of the marine mammal family Otariidae, one of three groupings of pinnipeds.They comprise 15 extant species in seven genera (another species became extinct in the 1950s) and are commonly known either as sea lions or fur seals, distinct from true seals (phocids) and the walrus ().
Odobenidae is a family of pinnipeds, of which the only extant species is the walrus (Odobenus rosmarus). In the past, however, the group was much more diverse, and includes more than a dozen fossil genera.
A humpback whale (Megaptera novaeangliae) A leopard seal (Hydrurga leptonyx). Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence. They include animals such as cetaceans (whales, dolphins and porpoises), pinnipeds (seals, sea lions and walruses), sirenians (manatees and dugongs), sea otters and polar bears.
Caniformia is a suborder within the order Carnivora consisting of "dog-like" carnivorans. They include dogs (wolves, foxes, etc.), bears, raccoons, and mustelids. [1] The Pinnipedia (seals, walruses and sea lions) are also assigned to this group.
In comparison to the two other major groups of marine or sea mammals, cetaceans and sirenians, pinnipeds are a relatively younger group having appeared about 24 to 38 million years ago and are still able to return on land to breed. The list of fossil taxa is based on mostly the historiographical data from Valenzuela-Toro and Pyenson (2019). [2]