Appearance and Adaptations
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- Diural during the summer and hibernates during the winter
- Skull: sciurognathous and sciuromorphous
Sciurognathous: lower jaw is v-shaped
Sciuromorphous: anterior to the orbit where the lateral masseter arises is a large zygomatic plate- Postorbital process
- Infraorbital foramen is small and shifted forward
- Teeth: lack canines, has continuously growing incisors with enamel only covering the front and sides that needed to be kept at a reasonable size by gnawing, a large diastema separates the incisors and cheek teeth
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