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Species of the infraorder Cetacea A phylogenetic tree showing the relationships among cetacean families. [1]The evolution of cetaceans is thought to have begun in the Indian subcontinent from even-toed ungulates (Artiodactyla) 50 million years ago (mya) and to have proceeded over a period of at least 15 million years. [2]
This made it possible for whales to move around with the vertical tail hitting the water. The front legs transformed into flippers, costing them their mobility on land. [82] One of the oldest members of ancient cetaceans (Archaeoceti) is Pakicetus from the Middle Eocene of Pakistan. This is an animal the size of a wolf, whose skeleton is known ...
Today, the closest living relatives of cetaceans are the hippopotamuses; these share a semi-aquatic ancestor that branched off from other artiodactyls some 60 mya. [11] Around 40 mya, a common ancestor between the two branched off into cetacea and anthracotheres ; nearly all anthracotheres became extinct at the end of the Pleistocene 2.5 mya ...
A female bottlenose dolphin performing with her trainer. They are considered one of the most intelligent cetaceans. Cetacean intelligence is the overall intelligence and derived cognitive ability of aquatic mammals belonging in the infraorder Cetacea (cetaceans), including baleen whales, porpoises, and dolphins.
This is an accepted version of this page This is the latest accepted revision, reviewed on 1 February 2025. Miss Baker, a squirrel monkey, rode a Jupiter IRBM (scale model of rocket shown) into space in 1959. Landmarks for animals in space 1947: First animals in space (fruit flies) 1949: First primate and first mammal in space 1950: First mouse in space 1951: First dogs in space 1957: First ...
The name Whippomorpha is a combination of English (wh[ale] + hippo[potamus]) and Greek (μορφή, morphē = form). [2]Some attempts have been made to rename the suborder Cetancodonta, due to the misleading utilization of the suffix -morpha for a crown group, [6] as well as the risk of confusion with the clade Hippomorpha (which consists of equid perissodactyls); [7] however Whippomorpha ...
Scientists have uncovered a curious behavior in humans’ closest living relatives. While every aminal needs to relieve itself, new research shows that chimpanzees , who share 98 percent of their ...
Odontoceti (toothed whales, dolphins, and porpoises) Superfamily Delphinoidea (dolphins, arctic whales, porpoises, and relatives) Family Delphinidae, 38 species (dolphins, killer whales, and relatives) Family Monodontidae, 2 species (beluga and narwhal) Family Phocoenidae, 6 species ; Superfamily Physeteroidea (sperm whales)