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Discovery of Ardipithecus kadabba (2004) Tim D. White (born August 24, 1950) is an American paleoanthropologist and Professor of Integrative Biology at the University of California, Berkeley . He is best known for leading the team which discovered Ardi , the type specimen of Ardipithecus ramidus , a 4.4 million-year-old likely human ancestor.
Ardi's foot is a special area of interest when examining the evolution of bipedalism in early Hominids, and the bipedality of Ardipithecus ramidus, because all five toes do not line up. [17] The remains of the foot from Ardi and other Ardipithecus ramidus specimens that can be studied includes "a talus, medial and intermediate cuneiforms ...
A. kadabba is considered to have been the direct ancestor of A. ramidus, making Ardipithecus a chronospecies. [7] The exact affinities of Ardipithecus have been debated. White, in 1994, considered A. ramidus to have been more closely related to humans than chimpanzees, though noting it to be the most ape-like fossil hominin to date. [1]
Ethiopia is considered the area from which anatomically modern humans emerged. [1] Archeological discoveries in the country's sites have garnered specific fossil evidence of early human succession, including the hominins Australopithecus afarensis (3.2 million years ago) and Ardipithecus ramidus (4.4 million years ago).
Ardipithecus ramidus was discovered by Tim White in 1992 at Aarmis in Middle Awash. The initial assemblage was made up of 13 dental fragments, some cranial fragments, some postcranial fragments, including from the radius and ulna. Since, over 100 total specimens have been discovered from 36 individuals.
Like later hominins, Ardipithecus had reduced canine teeth and reduced canine sexual dimorphism. [4] In 1992–1993 a research team headed by Tim White discovered the first A. ramidus fossils—seventeen fragments including skull, mandible, teeth and arm bones—from the Afar Depression in the Middle Awash river valley of Ethiopia. More ...
A fossil jawbone found by a British girl and her father on a beach in Somerset, England belongs to a gigantic marine reptile dating to 202 million years ago that appears to have been among the ...
He has been instrumental in the discoveries of the type specimen (principal reference fossil) for Australopithecus garhi and Ardipithecus kadabba (both discovered in 1997), and he has also found fossil specimens of Ardipithecus ramidus, Australopithecus afarensis, and species of Homo including Homo erectus, as well as Homo sapiens.