ANTH 4060 Lecture Notes - Lecture 6: Postorbital Bar, Stereopsis, Shoulder Joint
Document Summary
The shoulder joint is characterized (cid:271)(cid:455) a(cid:374) ellipti(cid:272)all(cid:455) shaped gle(cid:374)oid fossa o(cid:374) the s(cid:272)apula . There is no single trait that distinguishes primates from other mammals, rather a constellation of traits. Traits that characterize order primates: no single trait distinguishes primates from other orders of mammals, primates are characterized by having the following: Slow life histories (e. g. , long period of juvenile development) Short snout (reduced olfactory acuity) although there are exceptions to this. Prehensile (i. e. , grasping) hands and feet humans are the e(cid:454)(cid:272)petio(cid:374), (cid:449)e do(cid:374)"t ha(cid:448)e prehe(cid:374)sile feet. Nails, not claws some exceptions to this, lemurs, lorises, tarsiers, etc. Postorbital bar is a strut of bone to the side of the orbit, and is present in all living primates. Mobility of arm mobility of arm depends on position of scapula (shoulder blade) Negative allometry between body and brain weights in primates. Allometry relationship between two traits, typically between body size and some other variable.
