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1 giorno fa · A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia ( / məˈmeɪli.ə / ). Mammals are characterized by the presence of milk-producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
2 giorni fa · The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the late Carboniferous period. By the mid- Triassic, there were many synapsid species that looked like mammals.
5 giorni fa · Classification. Evolutionary history. See also. Notes. References. Further reading. External links. Marsupials are a diverse group of mammals belonging to the infraclass Marsupialia. They are primarily found in Australasia, Wallacea, and the Americas.
29 apr 2024 · mammal, (class Mammalia), any member of the group of vertebrate animals in which the young are nourished with milk from special mammary glands of the mother. In addition to these characteristic milk glands, mammals are distinguished by several other unique features.
2 giorni fa · Bibliography. Further reading. Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. As an informal and colloquial grouping, they correspond to large members of the infraorder Cetacea, i.e. all cetaceans apart from dolphins and porpoises.
5 giorni fa · Military. See also. References. Further reading. External links. Marine mammal. A humpback whale ( Megaptera novaeangliae) A leopard seal ( Hydrurga leptonyx) Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence.
1 giorno fa · From left to right: a polar bear (Ursus maritimus), a giraffe (Giraffa camelopardalis), †Paraceratherium transouralicum, †Patagotitan mayorum, two humans (Homo sapiens), †Palaeoloxodon recki, an African bush elephant (Loxodonta africana) and a white rhino (Ceratotherium simum)
