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An Asynchronous Mesozoic Marine Revolution: Drilling Versus Durophagy in Post-Paleozoic Echinoids

Lapic, Whitney Alexandra
http://orcid.org/0000-0003-1259-9391
http://rave.ohiolink.edu/etdc/view?acc_num=miami1619187876334553

Abstract Details

2021, Master of Science, Miami University, Geology and Environmental Earth Science.
In modern ecosystems, predation is known to influence ecosystem structure and dynamics. Although echinoids are common in the fossil record, they have not been as well studied relative to mollusks and offer a means of independently evaluating the hypothesis of Escalation. During the Mesozoic Marine Revolution (MMR), predation pressure is thought to have led to new evolutionary innovations and ecological expansions in marine ecosystems. The Mesozoic infaunalization of echinoids may have offered a means to escape increasing predation pressure. Here, we examine the relationship between durophagous predator diversity and both infaunal and epifaunal echinoid diversity. We have demonstrated an association between the emergence of infaunal echinoids and an increase in predator diversity during the Mesozoic, which appears to demonstrate the potential presence of an escalatory trend in echinoids. Among 81 genera of epifaunal echinoids, we identified five antipredatory morphologies including spine length, width, shape, ornamentation, and density of spines. While the proportion of genera with antipredatory morphologies were found to be dominant during the peak MMR, four of the five morphologies either emerged or reached a peak presence among new genera during the Early and Middle Jurassic, further suggesting that the MMR may be more asynchronous than originally thought.
Tyler Carrie, Dr. (Advisor)
McLeod Claire, Dr. (Committee Member)
Brudzinski Mike, Dr. (Committee Member)
Geology; Paleontology
Echinoids; Mesozoic Marine Revolution; antipredatory morphology; durophagy; predation

Recommended Citations

Citations

  • Lapic, W. A. (2021). An Asynchronous Mesozoic Marine Revolution: Drilling Versus Durophagy in Post-Paleozoic Echinoids [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1619187876334553

    APA Style (7th edition)

  • Lapic, Whitney. An Asynchronous Mesozoic Marine Revolution: Drilling Versus Durophagy in Post-Paleozoic Echinoids. 2021. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1619187876334553.

    MLA Style (8th edition)

  • Lapic, Whitney. "An Asynchronous Mesozoic Marine Revolution: Drilling Versus Durophagy in Post-Paleozoic Echinoids." Master's thesis, Miami University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1619187876334553

    Chicago Manual of Style (17th edition)

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This open access ETD is published by Miami University and OhioLINK.