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Bauer & Stigall, 2014

Phylogenetic paleobiogeography of Late Ordovician Laurentian brachiopods

Bauer, J. E., Stigall, A. L.
DOI10.3176/earth.2014.17
Aasta2014
AjakiriEstonian Journal of Earth Sciences
Köide63
Number4
Leheküljed189-194
Tüüpartikkel ajakirjas
Joonised3
OpenAccess
LitsentsCC BY 4.0
Keelinglise
Id4127

Abstrakt

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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