ERTH 2401 Lecture Notes - Lecture 5: Synapsid, Anapsid, Diapsid

• School: Carleton University
• Department: Earth Sciences
• Course: ERTH 2401
• Professor: Claudia Schröder-Adams

Document Summary

Importance of skull features: synapsida: opening behind the eye lower temporal fenestra. Either are chewing a lot before swallowing or swallowing without chewing that much: lower temporal opening provides visibility to the brain case, which paleontologists look at size of in comparison to the size of the animal. If small brain case but small animal, the animal can be really intelligent. Large number of bones allows for flexibility for grabbing prey and chewing: foramen magnum is where the vertical column is attached, brain case is not round, is irregular shape. Ischium and pubis are going backwards: bird pelvis(cid:859) the(cid:373)sel(cid:448)es are most closely related to sauropods which have. Saurischian type pelvis structure: saurischian have lizard hip type pelvis. Joints only allow a linear articulation: forward and backwards, no rotation as in humans, metatarsal joint, cursorial locomotion moving on land. Joints allow animals to move on land: two groups of dinosaurs, proposed by h. g.