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The Fossil Record and Adaptive Radiation

The Fossil Record and Adaptive Radiation. by Stefan Tassoulas Zach Herbst Caleb Jarriel Holden Lee Lambros Tassoulas. Introduction. Discovery of arthropods in amber droplets Inclusions from 230 mya (Schmidt et al. 2012) Amber from the Late Triassic

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The Fossil Record and Adaptive Radiation

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  1. The Fossil Record and Adaptive Radiation by Stefan Tassoulas Zach Herbst Caleb Jarriel Holden Lee Lambros Tassoulas

  2. Introduction • Discovery of arthropods in amber droplets • Inclusions from 230 mya (Schmidt et al. 2012) • Amber from the Late Triassic • Fossil record and adaptive radiation • Stratigraphy

  3. Data and Results • Worldwide amber deposition • 70,000 triassic amber droplets were examined (Schmidt et al. 2012) • 3 species of arthropods found

  4. Stratigraphy Analysis

  5. Discussion • 100 Ma before flowering plants appeared • Pegs conifer feeding as an ancestral trait • Eriophyidae group: adaptive radiation • 3500 species • Special body plan

  6. Conclusion • Three possible explanations for Carnian amber anomaly • Changes in sedimentation patterns • Increased resin production • Both factors together • Arthropod fossils in amber • Fossil record indicates adaptive radiation

  7. Literature Cited Schmidt, Alexander R., Saskia Jancke, and Evert E. Lindquist. "Arthropods in Amber from the Triassic Period." Proceedings of the National Academy of Sciences of the United States of America 109.37 (2012): 14796-4801. Print. Georg-August-Universität Göttingen. Courant Research Centre Geobiology. Discovery of the Earliest Arthropods Preserved in Amber. Georg-August-Universität Göttingen. N.p., 31 Aug. 2012. Web. 9 Sept. 2012. <http://www.uni-goettingen.de/en/3240.html?cid=4267>. Shanks, John. "230-Million-Year-Old Fly and Mites Found Preserved in Amber." Sci-news.com. Sci-News.com, 27 Aug. 2012. Web. 9 Sept. 2012. <http://www.sci-news.com/paleontology/article00551.html>.

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