MiniAssignment6Tail_CharleeWessels!

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Texas A&M University *

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207

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Anthropology

Date

Apr 3, 2024

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pdf

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Uploaded by PrivateThunder5144

Mini-Assignment 6: Prepare for the next excavation lab (caudal bones and trace fossils) To answer the questions below, read pages 226-231 about dinosaur trace fossils and see box 6.1 and page 341 for information about the skeletal regions you’ll seen in lab this week. 1. What trace fossil could serve as evidence that main dinosaur you are excavating was predated upon? (1 pt) - The vertebrae and rib bones are good indicators of theropods, sauropods, and hadrosaurs being preyed upon if they have tooth marks. 2. What evidence could you use to support that a given coprolite was made by a dinosaur? What might give you uncertainty about what animal made the coprolite? (2 pts) - Given evidence that the coprolite was created by a dinosaur is looking at the diet of the dinosaur. They can also produce the bones and teeth of some dinosaurs. The spinal groves can also indicate a fish-eater. The text book mentions that this is not always accurate so that can provide some uncertainty. 3. The ventral bones beneath the skeleton are called chevrons. What are the functions of chevrons? (1 pt) - The chevrons function as attachment sites for ventricle flexor muscles in the tail. 4. What are the two types of bones represented in the caudal region of the organism’s skeleton? (1pts)

- The bones represented in the caudal region of the organism’s skeleton include the caudal vertebrae and the chevrons. 5. Examine the figures of these dinosaur tails. You may need to be logged in to the library using your NetID and password to view some images. Describe the differences you see among the taxa using at least 5 of the following terms : centrum, neural arch, neural spine, transverse process, chevron, osteoderm, caudal, sacral (5 pts) Ankylosaur: https://journals.plos.org/plosone/article/figure/image?size=large&id=10.1371/j ournal.pone.0006738.g001 Titanosaur: https://media.springernature.com/full/springer static/image/art%3A10.1038%2Fsrep06196/MediaObjects/41598_2014_Article_BFsrep061 96_Fig1_HTML.jpg?as=webp Spinosaur: https://media.springernature.com/full/springer static/image/art%3A10.1038%2Fs41586-020-2190- 3/MediaObjects/41586_2020_2190_Fig1_HTML.png?as=webp - Based on the pictures provided it can be concluded that all three had a chevron. The spinosaur contains a neutral arch in its spine, just like the ankylosaur and titanosaur which also contain a neutral spine. ankylosaur and titanosaur seem to have more limited transverse and it can be concluded that all three contained a centrum.

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MiniAssignment6Tail_CharleeWessels!

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