Journal
ESTONIAN JOURNAL OF EARTH SCIENCES
Volume 63, Issue 4, Pages 189-194Publisher
ESTONIAN ACAD PUBLISHERS
DOI: 10.3176/earth.2014.17
Keywords
Lieberman-modified Brooks Parsimony Analysis; macroevolution; speciation; Katian; dispersal; vicariance; invasion
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Funding
- NSF [EF-1206750, EAR-0922067]
- Yale Peabody Museum's Schuchert and Dunbar
- Geological Society of America Student Research Grant
- Ohio University Geological Sciences Alumni Grant
- IGCP Project [591]
- Dry Dredgers Paleontological Research Award
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Phylogenetic biogeographic analysis of four brachiopod genera was used to uncover large-scale geologic drivers of Late Ordovician biogeographic differentiation in Laurentia. Previously generated phylogenetic hypotheses were converted into area cladograms, ancestral geographic ranges were optimized and speciation events characterized as via dispersal or vicariance, when possible. Area relationships were reconstructed using Lieberman-modified Brooks Parsimony Analysis. The resulting area cladograms indicate tectonic and oceanographic changes were the primary geologic drivers of biogeographic patterns within the focal taxa. The Taconic tectophase contributed to the separation of the Appalachian and Central basins as well as the two midcontinent basins, whereas sea level rise following the Boda Event promoted interbasinal dispersal. Three migration pathways into the Cincinnati Basin were recognized, which supports the multiple pathway hypothesis for the Richmondian Invasion.
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