Draw a cladogram of the major groups of dinosaurs discussed within your textbook (Google might be helpful for this question!!). Label and identify each group and provide a brief description. Draw label and describe the pelvic structure of the Saurischian group. Draw label and identify the pelvic structure of the Ornithischian group. The diapsid reptiles consist of two large groups. Name and describe these two groups. How do the ankle structures of the archosaur provide an insight to their phylogenetic relationship? Describe what features distinguish saurischians from Ornithischia dinosaurs. Briefly summarize the where when and what of the origin of dinosaurs.
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