ANT100Y1 Lecture Notes - Lecture 5: Laetoli, Arboreal Locomotion, Homo Habilis

• School: UTSG
• Department: Anthropology
• Course: ANT100Y1
• Professor: (3differentprofs)

Document Summary

Partial tibia provides strong evidence for bipediality (locomotive on hind limbs) Ethiopia (hadar, omo, and fejej) and tanzania (laetoli) Complex morphology exhibiting some ape-like traits (e. g. large sagittal crests, shallow face, long snout) and hominin-like traits (e. g. valgus knee) Sagittal crest = ridge of bone that runs lengthwise from front to back along top of skill, where strong chewing muscles attach. Canines and incisors larger and more sexually dimorphic than modern humans, but smaller and less sexually dimorphic than extant apes. Long finger bones (trait associated with suspensory locomotion) Laetoli footprints (can"t say for sure if afarensis, but operated in the same place and time) Big toes hardly diverged from the rest of the foot, unlike chimpanzees. Gait was heel-strike followed by toe-off (heel-toe-push); the way modern humans walk. Their feet are like a human hand; the thumb toe is at the side. Was given the name selam(means peace): fossilized skull and skeletal remains of.