REN R205 Lecture Notes - Lecture 5: Arctic Ground Squirrel, Zygomatic Arch, Foramen Magnum
6 Apr 2016
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Document Summary
Arctic ground squirrel has little white spots along the brown fur back. Bat ear has tragus: helps focus sound. Calcar: not a finger/part of wing membrane: raw cartilage. Frontals are paired (most features that follow are) Maxilla: lateral to nasals, ha teeth attached to it (fang looking ones) Zygomatic arch: kind of cup the eyes. Coronoid process (kind of on top of the lower jaw) Sagittal crest (not paired) line bump, for muscle attachment, in middle. Nuchal crest: little wall/edge at the end of head on each side. Temporal fenestra: the hole near the temporal bone (fenestra= means window) Foramen magnum: where the spinal cord joins the brain. Auditory (tympanic) bulla: where the ear is surrounded by the bone. Bigger the auditory bulla, the better the hearing. Occipital condyle: kind of surrounds the foramen magnum, or covers it slightly. Rodents have bands of hard enamel in their teeth. P4/m1 carnassial pair: for cutting through flesh (all carnivorous animals have.
