EARTH 7 Lecture Notes - Lecture 12: Herrerasaurus, Theropoda, Tetanurae
Document Summary
Earth 7: dinosaurs | lecture: into to theropods. Note taker: deanna coughlin (714) 235-7896; deannajasmine@yahoo. com lecture 13: Hollow bones: lighter for more efficient running and later flight. Birds are theropod dinosaurs knife-like teeth lost in living birds but present in early birds hollow bones (still present) ~230 ma (midtriassic), argentina small, bipedal like all early dinosaurs. Herrerasaurus and coelophysis probably look quite similar to the ancestor of all dinosaurs. Although there are important changes throughout theropod evolution, many later theropods maintain the form of herrerasaurus. Horned lizard iclicker: considering scaling principles, brachiosaurus probably ate less food than this ceratosarus. Birds are tetanurans stiff tails present but reduced. 3-digit hands present, fused complex branching air sacs. ~50 ft long likely ate lots of different animals, lots of huge fish semi-aquatic with limited mobility on land (think crocodile) Allosaurus abundant remains suggest that it was the dominant large predator in n.
