ANTHR-140 Lecture Notes - Lecture 32: Ectotympanic, Treeshrew, Toe
23 Sep 2020
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Document Summary
Forward facing eyes with stereoscopic and binocular vision. Stereoscopic vision is when images are superimposed, allowing perception of 3 dimensional objects. Binocular vision is the overlapping of visual fields (depth perception) Reduced rostrum (a result of emphasizing vision, not olfactory) Ethmoid [a dynastic trait] exposed in eye orbit (hidden in other mammals) Petrosal bulla is (infused ectotympanic is free within the ear tube, not observed in scandentia or treeshrew ) the bone at the bottom of the skull that sticks out. Postorbital bar or postorbital closure that protects the eyes. Large cerebellum, cerebral hemispheres, and frontal lobe. Pentadactyl or having 5 digits on each hand and foot. Descriptive traits are ones that might go beyond classification they help. Flash out one understanding of the biology of an organism. A taxonomic group that has a single common ancestor and includes all decedents.
