Geos 308 Discussion Assignment 4 (4)

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University Of Arizona *

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Course

308

Subject

Anthropology

Date

Dec 6, 2023

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docx

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Uploaded by JusticeButterfly15735

For this assignment, you will read the following paper (found in the discussion readings folder): Carr, T. D., Napoli, J. G., Brusatte, S. L., Holtz, T. R., Hone, D. W., Williamson, T. E., & Zanno, L. E. (2022). Insufficient Evidence for Multiple Species of Tyrannosaurus in the Latest Cretaceous of North America: A Comment on “The Tyrant Lizard King, Queen and Emperor: Multiple Lines of Morphological and Stratigraphic Evidence Support Subtle Evolution and Probable Speciation Within the North American Genus Tyrannosaurus ”. Evolutionary Biology , 49 (3), 327-341. For some context on this paper, check out the NY Times coverage here: https://www.nytimes.com/2022/02/28/science/tyrannosaurus-rex-species.html https://www.nytimes.com/2022/07/25/science/tyrannosaurus-rex-dinosaurs.html Based on this paper, answer the following questions and bring them to class with you. 1. How did Paul et al. split Tyrannosaurus rex into three species? 2. Paul et al. define two chronospecies and one morphospecies. What are these and what lines of evidence do they give to justify these species? 3. How did Paul et al. diagnose the three species? Do you think these are sufficient diagnoses? 4. What was the basis of Carr et al.’s rebuttal? 5. How did Carr et al. use the bird data to support their point? 6. What is the problem, according to Carr et al., of using privately held specimens?

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