ANTA01H3 Study Guide - Sexual Dimorphism, Sterkfontein, Foramen Magnum
Document Summary
Species: anamensis, bahrelghazali, afarensis (lucy, africanus (taung child, mrs. ples, rubustus, aethiopicus (black skull), garhi, p. boisei (dear boy/zinj/ South africa: 3. 5-2. 3 mya (location of taung child, mrs. ples) Note: dating methods from south africa is less precise because cannot use potassium-argon dating. Note: large molar teeth are generally found in australopithecines. Chimpanzees have rectangular shaped jaws, humans have parabolic shaped jaws (u-shaped) Comparable to that of a chimpanzee? of a chimpanzee of a chimpanzee. Small braincase 520cc: boisei: 500-530cc, aethiopicus: 410cc, garhi: 450cc. Sagittal crest and flaring cheek shaped dental pattern like humans constriction which gives evidence that prefrontal cortex has not developed. Canine teeth and shape of jaw is intermediate between apes and humans. Dental arcade is a rounded rectangle, intermediate shape between chimpanzees and humans. Foramen magnum in middle of skull cheek bones bones. Relatively small front teeth area and thick enamel good for crushing hard objects and resisting abrasion.