Bipedalism - Protohominids-earliest members of the hominid...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Bipedalism Bipedal posture Bipedal locomotion habitual bipedalism – form of locomotion practiced by hominids Foramen Magnum Position Positioned further forward (anteriorly) under the skull Pelvis Apes have a long, narrow pelvis Lower Limb adaptations for bipedalism -enlarged head of femur -knee angled inward -short toes -long hindlimbs Foot Adaptations -big toe (hallux) enlarged and non-opposable -longitudinal arch forms to better support weight Hypotheses of the origin of Bipedalsim freeing hands running after game hunting (looking over tall grass) efficient for staying cool making and using tools sexual display Why did bipedalism evolve? Early Hominids and Australopithecines -Ape/hominid split (approximately 7-10 mya)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Protohominids-earliest members of the hominid lineage-7-5 mya-sahelanthropus tchadensis-orrorin tuganensis-Structure and behavior are reconstructed hypothetically Sahelanthropus tchadensis-oldest suggested hominid species-7-6 mya, discovered in Chad, 2001-Partial cranium recovered-small brain-little prognathism-hominid like teeth-bipedal? Orrorin tuganensis-6mya Tugen Hills, Kenya Teeth and Prostcrania recovered leg bones look bipedal human like teeth (small canines and thick enamel) Ardipithecus kadabba MNI = 5 (minimum number of individuals) 5.8 and 5.5 mya Rift Valley (Etheopia) Bipedal Earliest consensus, human ancestor...
View Full Document

{[ snackBarMessage ]}

Page1 / 2

Bipedalism - Protohominids-earliest members of the hominid...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online