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Paleobiogeographical and Evolutionary Analysis of Late Ordovician, C5 Sequence Brachiopod Species, with Special Reference to Rhynchonellid Taxa

Swisher, Robert E.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1245445583

Abstract Details

2009, Master of Science (MS), Ohio University, Geological Sciences (Arts and Sciences).
The record of Late Ordovician brachiopod species of Laurentia records interbasinal invasion and subsequent evolution of brachiopod fauna both taxonomically and ecologically. These patterns are assessed through environmental niche modeling of brachiopod species of the C5 sequence of the Cincinnati Arch region and through a phylogenetic analysis of the Laurentian rhynchonellid genera, Hiscobeccus, Lepidocyclus, and Hypsiptycha. Paleobiogeographic patterns are similar for both native taxa and Richmondian invaders throughout the C5 sequence. Brachiopod species closely track their preferred sets of environmental variables through time and space in a symmetrical pattern. In a regional context, the majority of species demonstrate a coordinated response to shifting environmental conditions through time. Phylogenetic analysis confirms the monophyly of Lepidocyclus and Hypsiptycha, while the traditional definition of Hiscobeccus comprised a paraphyletic grade. Two new genera, Eohiscobeccus and Parahiscobeccus, are erected to house basal braches within the traditional definition of Hiscobeccus, returning the genus to a monophyletic clade.
Alycia L. Stigall, PhD (Advisor)
Daniel Hembree, PhD (Committee Member)
David Kidder, PhD (Committee Member)
264 p.
Paleontology
paleobiogeography; brachiopod; niche modeling; phylogenetic; habitat tracking

Recommended Citations

Citations

  • Swisher, R. E. (2009). Paleobiogeographical and Evolutionary Analysis of Late Ordovician, C5 Sequence Brachiopod Species, with Special Reference to Rhynchonellid Taxa [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1245445583

    APA Style (7th edition)

  • Swisher, Robert. Paleobiogeographical and Evolutionary Analysis of Late Ordovician, C5 Sequence Brachiopod Species, with Special Reference to Rhynchonellid Taxa. 2009. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1245445583.

    MLA Style (8th edition)

  • Swisher, Robert. "Paleobiogeographical and Evolutionary Analysis of Late Ordovician, C5 Sequence Brachiopod Species, with Special Reference to Rhynchonellid Taxa." Master's thesis, Ohio University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1245445583

    Chicago Manual of Style (17th edition)

ohiou1245445583
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© 2009, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.