BIOL 4334 Lecture Notes - Lecture 8: Cricetidae, Flying Squirrel, Castoridae
30 Sep 2016
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Document Summary
Enamel is restricted to the front of the teeth, not on the back. Softer dentine on back of the tooth wears more rapidly = chisel like cutting edge. Nictitating membrane is the extra layer over the eye so they can keep them open while swimming. Valvular nostrils and ears flap to close them off and keep water out. Possess a cloaca reproductive and waste ducts are together. Castor oil (castoreum): smells like vanilla and is safe to east. Ecosystem engineers modify, change, or maintain and ecosystem. Massive skulls to allow for big jaw bone. Basioccipital region depressed area in the back middle of the skull (between the auditory bullae) 4 digits on front feet, 5 digits on hind. Rounded in profile with sharp post orbital processes (picture in slides) Can tell apart from southern because of a two colored belly when you rub fur the wrong direction. Nocturnal, and goes into torpor during cold weather.
