EARTH 7 Lecture Notes - Lecture 8: Tianyulong, Ornithischia, Predentary
Document Summary
Earth 7: dinosaurs | lecture: introduction to ornithischia and the. Note taker: deanna coughlin (714) 235-7896; deannajasmine@yahoo. com lecture 9: Predentary bone- lacks teeth like a beak for cropping vegetation (most are herbivores) Higher jaw joint than in other dinosaurs for grinding vegetation rather than cutting: laquintasaura. About 200 ma, one of oldest known ornithischians. Different ages found together; herds: tianyulong confuciusi. Traces of feathers all over the body: evolutionary trends. Difference between evolutionary trend and novelty: many different evolutionary novelties lead to a evolutionary trend; more like behaviors. Novelty is a specific piece of morphology we can label. Solution: large belly, gastroliths (stomach+stones), lots of chewing. Released methane by farting; equal to all methane released today: armored dinosaurs (thyreophora) Range: early jurrasic to late cretaceous (~130 million years: landmark discoveries. 1833: gideon mantell (hylaeosaurs); used to coin dinosauria. 1861: richard owen (scelidosaurus); one of earliest complete dinosaurs discovered. Large size and quadrupedal; convergent with other dinosaur groups.
