The AL 333-160 fourth metatarsal from Hadar compared to that of humans, great apes, baboons and proboscis monkeys: non-conclusive evidence for pedal arches or obligate bipedality in Hadar hominins.

@article{Mitchell2012TheA3,
  title={The AL 333-160 fourth metatarsal from Hadar compared to that of humans, great apes, baboons and proboscis monkeys: non-conclusive evidence for pedal arches or obligate bipedality in Hadar hominins.},
  author={Professor James E. Mitchell and Esteban E. Sarmiento and D. Jeffrey Meldrum},
  journal={Homo : internationale Zeitschrift fur die vergleichende Forschung am Menschen},
  year={2012},
  volume={63 5},
  pages={336-67}
}
Based on comparisons to non-statistically representative samples of humans and two great ape species (i.e. common chimpanzees Pan troglodytes and lowland gorillas Gorilla gorilla), Ward et al. (2011) concluded that a complete hominin fourth metatarsal (4th MT) from Hadar, AL 333-160, belonged to a committed terrestrial biped with fixed transverse and longitudinal pedal arches, which was no longer under selection favoring substantial arboreal behaviors. According to Ward et al., the Hadar 4th MT… CONTINUE READING

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