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The Cenozoic is also known as the Age of Mammals because the terrestrial animals that dominated both hemispheres were mammals – the eutherians in the Northern Hemisphere and the metatherians (marsupials, now mainly restricted to Australia and to some extent South America) in the Southern Hemisphere. The extinction of many groups allowed ...
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Figure 1:In mammals, the quadrate and articular bones are small and part of the middle ear; the lower jaw consists only of dentary bone.. While living mammal species can be identified by the presence of milk-producing mammary glands in the females, other features are required when classifying fossils, because mammary glands and other soft-tissue features are not visible in fossils.
View history; Tools. Tools. move to sidebar hide. Actions Read; ... Printable version; In other projects ... Prehistoric animals of the Cenozoic Era
c. 4,300 Ma – Nectarian Era begins on Earth. c. 4,250 Ma – Earliest evidence for life, based on unusually high amounts of light isotopes of carbon, a common sign of life, found in Earth's oldest mineral deposits located in the Jack Hills of Western Australia. [4] c. 4,100 Ma – Early Imbrian Era begins on Earth.
The Rancholabrean North American Land Mammal Age on the geologic timescale is a North American faunal stage in the North American Land Mammal Ages chronology (NALMA), [1] named after the famed Rancho La Brea fossil site (more commonly known as the La Brea tar pits) in Los Angeles, California. [2]
Quaternary mammals of North America (2 C, 10 P) Pages in category "Cenozoic mammals of North America" The following 32 pages are in this category, out of 32 total.
View history; Tools. Tools. ... Cenozoic mammals of the Cenozoic Era in Europe ... Pages in category "Cenozoic mammals of Europe"