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Convergent Evolution in Tooth Morphology of Filter Feeding Lamniform Sharks

Mitchell, Michaela Grace
http://rave.ohiolink.edu/etdc/view?acc_num=wright1478543402652077

Abstract Details

2016, Master of Science (MS), Wright State University, Earth and Environmental Sciences.
The basking shark (Cetorhinus maximus) and megamouth shark (Megachasma pelagios) are two species of filter feeding sharks, both belonging to the order Lamniformes. There are two conflicting hypotheses regarding the origins of filter feeding in Lamniform sharks; that there is a single origin of filter feeding within Lamniformes, or conversely, the filter feeding adaptations have been developed independently due to different ancestral conditions. Evidence obtained from several studies strongly supports the latter hypothesis. Because evidence suggests that C. maximus and M. pelagios have developed their filter feeding adaptations independently, we expect to see convergent evolution taking place within these two lineages. Geometric morphometric analyses were performed on fossil and Recent teeth of megamouth and basking sharks to determine if there is commonality among tooth shape. The results of the analyses support independently derived filter feeding morphologies and convergent evolution within these two lineages.
Charles Ciampaglio, Ph.D. (Committee Chair)
Stephen Jacquemin, Ph.D. (Committee Member)
Stacey Hundley, Ph.D. (Committee Member)
David Schmidt, Ph.D. (Committee Member)
89 p.
Evolution and Development; Morphology; Paleontology
paleontology; morphology; evolution and development

Recommended Citations

Citations

  • Mitchell, M. G. (2016). Convergent Evolution in Tooth Morphology of Filter Feeding Lamniform Sharks [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1478543402652077

    APA Style (7th edition)

  • Mitchell, Michaela. Convergent Evolution in Tooth Morphology of Filter Feeding Lamniform Sharks. 2016. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1478543402652077.

    MLA Style (8th edition)

  • Mitchell, Michaela. "Convergent Evolution in Tooth Morphology of Filter Feeding Lamniform Sharks." Master's thesis, Wright State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1478543402652077

    Chicago Manual of Style (17th edition)

wright1478543402652077
998
© 2016, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.