ENWC418 Lecture Notes - Lecture 3: Incus, Liaoning, Caudipteryx

• School: University of Delaware
• Department: Entomology and Wildlife Conservation
• Course: ENWC418
• Professor: Shriver

Document Summary

Enwc418 lecture 3 origins and evolution of birds: overview, mesozoic era: began 245 million years ago and lasted 180 million years. I(cid:374) hu(cid:373)a(cid:374)"s (cid:373)ale are xy and females are xx. It had 11 pairs of ribs but unlike modern birds, they were unjointed. Liaoning province, china: the lake bed formation dates to the early cretaceous (124-128 million years ago, Archeopteryx was 150 mya: ino auropteryx (cid:862)downy dino (cid:863, considered the first feathered dinosaur, was discovered in china in 1997. It was a small chick-sized coelurosaur dated to the late jurassic or early. Cretaceous and was non-flying: small tubular and perhaps branched structures emerged from its skin and were likely early feathers with hollow cylinders, caudipteryx, also discovered in china, these are the (cid:862)feathered di(cid:374)os(cid:863) of the popular press. Alvarezsauroids and illuminates incipient stages of the highly modified alvarezsaurid forelimb: summary, the evolution of birds from theropods dinosaurs was one of the greatest evolutionary transitions in the history of life.