Independent evolution of knuckle-walking in African apes shows that humans did not evolve from a knuckle-walking ancestor
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چکیده
منابع مشابه
Knuckle walking by a baboon (Papio cynocephalus).
This paper describes the development of a knuckle walking mode of locomotion by a free-living yellow baboon (Papio cynocephalus). Some implications of this occurrence for theories of the evolution of knuckle walking are discussed.
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Richmond & Strait (2000) have attracted much attention with a recent morphometric analysis of distal radii of anthropoids and hominid fossils, suggesting some of the latter share knuckle-walking traits. Several aspects of their treatment deserve comment. These authors show A.L. 288-1q,v and the putative hominid fossil KNM-ER 20419 falling near chimpanzees and gorillas in a canonical analysis of...
متن کاملKnuckle-Walking Signal in the Manual Phalanges and Metacarpals of the Great Apes (Pan and Gorilla)
To understand the role of knuckle walking in hominin evolution, we need to better understand behavioral variation in knuckle walking, and specifically whether behavioral similarities between chimpanzees and gorillas are likely homologous. Differences in how the hands of gorillas and chimpanzees contact the ground while knuckle walking have been noted but not quantified: it is widely believed th...
متن کاملOrigin of human bipedalism: The knuckle-walking hypothesis revisited.
Some of the most long-standing questions in paleoanthropology concern how and why human bipedalism evolved. Over the last century, many hypotheses have been offered on the mode of locomotion from which bipedalism originated. Candidate ancestral adaptations include monkey-like arboreal or terrestrial quadrupedalism, gibbon- or orangutan-like (or other forms of) climbing and suspension, and knuck...
متن کاملComment on "Origin of human bipedalism as an adaptation for locomotion on flexible branches".
Thorpe et al. (Reports, 1 June 2007, p. 1328) concluded that human bipedalism evolved from a type of bipedal posture they observed in extant orangutans with seemingly human-like extended knees. However, humans share knuckle-walking characters with African apes that are absent in orangutans. These are most parsimoniously explained by positing a knuckle-walking precursor to human bipedalism.
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2009
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.0901280106