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Some biologists suggest the modern giraffes descended from G. jumae; [10] others find G. gracilis a more likely candidate. G. jumae was larger and more robust, while G. gracilis was smaller and more slender. [6] The changes from extensive forests to more open habitats, which began 8 mya, are believed to be the main driver for the evolution of ...
The sauropods and giraffes independently evolved long necks. [ 74 ] The horned snouts of ceratopsian dinosaurs like Triceratops have also evolved several times in Cenozoic mammals: rhinos , brontotheres , Arsinoitherium , and Uintatherium .
The Masai giraffe (Giraffa tippelskirchi [2]), also spelled Maasai giraffe, and sometimes called the Kilimanjaro giraffe, is a species or subspecies of giraffe. It is native to East Africa. The Masai giraffe can be found in central and southern Kenya and in Tanzania. It has distinctive jagged, irregular leaf-like blotches that extend from the ...
A = Anapsid, B = Synapsid, C = Diapsid. It was traditionally assumed that first reptiles were anapsids, having a solid skull with holes only for the nose, eyes, spinal cord, etc.; [10] the discoveries of synapsid-like openings in the skull roof of the skulls of several members of Parareptilia, including lanthanosuchoids, millerettids, bolosaurids, some nycteroleterids, some procolophonoids and ...
Evolutionary ideas of the Renaissance and Enlightenment – Changes in evolutionary philosophies; Transmutation of species – 18th and 19th-century evolutionary ideas; 1860 Oxford evolution debate – Discussion about evolution in Oxford, England; Neo-Darwinism – Used to describe the combination of natural selection and genetics
Articles relating to the giraffe, a tall African hoofed mammal belonging to the genus Giraffa. It is the tallest living terrestrial animal and the largest ruminant on Earth. The giraffe's chief distinguishing characteristics are its extremely long neck and legs, its horn-like ossicones , and its spotted coat patterns.
Some scientists believed that modern ungulates were descended from an evolutionary grade of mammals known as the condylarths. [24] The earliest known member of this group may have been the tiny Protungulatum , a mammal that co-existed with the last of non-avian dinosaurs 66 million years ago. [ 25 ]
The South African giraffe or Cape giraffe (Giraffa giraffa [2] or Giraffa camelopardalis giraffa) is a species or subspecies of giraffe found in South Africa, Namibia, Botswana, Zimbabwe, Eswatini and Mozambique. It has rounded or blotched spots, some with star-like extensions on a light tan background, running down to the hooves.