|Title||Earliest complete hominin fifth metatarsal-Implications for the evolution of the lateral column of the foot|
|Publication Type||Journal Article|
|Year of Publication||2009|
|Authors||Zipfel, B, DeSilva, JM, Kidd, RS|
|Journal||American Journal of Physical Anthropology|
|Pagination||532 - 545|
|Keywords||A. africanus, bipedality, feet, South Africa, sterkfontein|
StW 114/115, from Sterkfontein, South Africa, is the earliest complete hominin fifth metatarsal. Comparisons of StW 114/115 to modern humans, extant apes, and partial hominin metatarsals AL 333-13, AL 333-78, SKX 33380, OH 8, and KNM-ER 803f reveal a similar morphology in all six fossils consistent with habitual bipedality. Although StW 114/115 possesses some primitive characters, the proximal articular morphology and internal torsion of the head are very human-like, suggesting a stable lateral column and the likely presence of lateral longitudinal and transverse tarsal arches. We conclude that, at least in the lateral component of the foot of the StW 114/115 individual, the biomechanical pattern is very similar to that of modern humans. This, however, may not have been the case in the medial column of the foot, as a mosaic pattern of hominin foot evolution and function has been suggested. The results of this study may support the hypothesis of an increased calcaneo-cuboid stability having been an early evolutionary event in the history of terrestrial bipedalism. Am J Phys Anthropol 2009. © 2009 Wiley-Liss, Inc.
|Short Title||Am. J. Phys. Anthropol.|
Earliest complete hominin fifth metatarsal-Implications for the evolution of the lateral column of the foot
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