Sahelanthropus tchadensis (7-6mya). - 2001. Michel Brunet. Djurab desert, chad. 2500km from East rift valley
350 cc brain.
massive browridge.
foramen magnum backward
non honing complex.
diverse diet.
forest habitatnear lake.
Orrorin tugensis 6mya. tugen hills. kenya. bipedal curved phalanx. non honing complex.
Ardipithecus Kadabba & Ar. ramidus. (6-4 mya)
Awash valley Ethiopia. Tim White found. 1980s. 70 scientists. continuous record of hominin evolution. Mosaic evolution features. ardi = groud & ramid = root.
Hominin masticatory conplex. Non projecting canines. Thicker enamel. Big toe opposable. Curved phlanges and rigid foot so poor bipedalism.
No suspension bone type in elbow. Evolved pelvis. Forearm extraordinary long.
longforearm than humans - primitive. pelvis developed. lower limbs have elongated divergent toe for grasping but also for bipedality. Mosaic evolution in ardipithecus.
Enamel thinner than man. big toe opposable - unlike man. phlanges curved to grasp. So part time quadruped & part time biped.