EARTH 7 Lecture Notes - Lecture 13: Anzu (Dinosaur), Caudipteryx, Maniraptora
Document Summary
Note taker: deanna coughlin (714) 235-7896; deannajasmine@yahoo. com lecture 14: Maniraptors and bird evolution birds are maniraptors maniraptor diversity: therizinosaurians and oviraptorosarians birds and deinonychosaurians have advanced feathers feathers and the link between development and evolution archaeopteryx, iconic flying dinosaur (bird) an overview of early bird evolution. Evolutionary novelties maniraptors= hand snatchers semi-lunate carpal bowed ulna. Allowed maniraptors to rotate their wrists more effectively; becomes important for flight highly stabilized tail reversed pubis- convergent in maniraptors and ornithischians. Beipiaosaurus possesses an interesting mix of intermediate feather types. Unlike the rest of the theropods, skeletal and dental features suggest. Caudipteryx zoui another specimen from liaoning (early cretaceous) one of several species of oviraptors with evidence of multiple types of feathers peacock sized. Anzu wyliei late cretaceous of montana and s. dakota. Toothless beak= novelty of oviraptorosaurians and convergent with aves and ornithomimids. Gigantoraptor late cretaceous of china much larger than most oviraptosaurians. Deinonychosaurians include troodontids and dromaeosaurids; may be paraphyletic.
