High-latitude tertiary migrations of an exclusively tropical clade: Evidence from Malpighiaceae
Explanations of tropical intercontinental disjunctions involving South America and Africa typically invoke vicariance of western Gondwanan biotas or long-distance dispersal. However, many plant groups originated and diversified well after the last direct connection between Africa and South America (...
Published in: | International Journal of Plant Sciences |
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ftlouisianastuir:oai:repository.lsu.edu:biosci_pubs-3663 2024-09-15T18:24:04+00:00 High-latitude tertiary migrations of an exclusively tropical clade: Evidence from Malpighiaceae Davis, Charles C. Fritsch, Peter W. Bell, Charles D. Mathews, Sarah 2004-01-01T08:00:00Z application/pdf https://repository.lsu.edu/biosci_pubs/2664 https://doi.org/10.1086/383337 https://repository.lsu.edu/context/biosci_pubs/article/3663/viewcontent/2664.pdf unknown LSU Scholarly Repository https://repository.lsu.edu/biosci_pubs/2664 doi:10.1086/383337 https://repository.lsu.edu/context/biosci_pubs/article/3663/viewcontent/2664.pdf Faculty Publications Africa Biogeography Long-distance dispersal Nonparametric rate smoothing Penalized likelihood South America Vicariance Western Gondwana text 2004 ftlouisianastuir https://doi.org/10.1086/383337 2024-08-08T04:27:15Z Explanations of tropical intercontinental disjunctions involving South America and Africa typically invoke vicariance of western Gondwanan biotas or long-distance dispersal. However, many plant groups originated and diversified well after the last direct connection between Africa and South America (ca. 105 million years before the present [mybp]), and it is unlikely that long-distance dispersal accounts for the distribution of all of these. A less commonly invoked explanation, the boreotropics hypothesis, indicates that some tropical disjunctions arose during the Tertiary via high-latitude land connections when northern forests supported tropical vegetation. Malpighiaceae are widely distributed across Africa and South America and have been explained as ancient "Gondwanian aborigines" (i.e., vicariants of western Gondwanan biotas) or more recent "American colonists" (i.e., long-distance dispersalists from South America into the Old World). Fossil and phylogenetic evidence from clock-independent estimates of molecular divergence times indicate that Malpighiaceae originated in South America during the latest Cretaceous (ca. 68 mybp), in isolation from Africa, and that six amphi-Atlantic disjunctions within the family occurred during three major episodes: late Paleocene (ca. 60 mybp), latest Eocene-earliest Oligocene (ca. 34-31 mybp), and early Miocene (ca. 21-17 mybp). These age estimates reject a Gondwanan origin for Malpighiaceae, and strict dispersal scenarios ignore paleoclimate, paleoland configurations, and fossil evidence that indicates that the family once inhabited northern latitudes. Instead, these data suggest that Paleocene-Oligocene amphi-Atlantic disjunct groups in Malpighiaceae moved into North America from South America via the Caribbean Basin, crossed the North Atlantic into Eurasia, and subsequently reached the Old World Tropics during warm intervals when land configurations would have facilitated this migration. Whether Miocene migrations of evergreen thermophilic Malpighiaceae proceeded via ... Text North Atlantic LSU Digital Commons (Louisiana State University) International Journal of Plant Sciences 165 S4 S107 S121 |
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Open Polar |
collection |
LSU Digital Commons (Louisiana State University) |
op_collection_id |
ftlouisianastuir |
language |
unknown |
topic |
Africa Biogeography Long-distance dispersal Nonparametric rate smoothing Penalized likelihood South America Vicariance Western Gondwana |
spellingShingle |
Africa Biogeography Long-distance dispersal Nonparametric rate smoothing Penalized likelihood South America Vicariance Western Gondwana Davis, Charles C. Fritsch, Peter W. Bell, Charles D. Mathews, Sarah High-latitude tertiary migrations of an exclusively tropical clade: Evidence from Malpighiaceae |
topic_facet |
Africa Biogeography Long-distance dispersal Nonparametric rate smoothing Penalized likelihood South America Vicariance Western Gondwana |
description |
Explanations of tropical intercontinental disjunctions involving South America and Africa typically invoke vicariance of western Gondwanan biotas or long-distance dispersal. However, many plant groups originated and diversified well after the last direct connection between Africa and South America (ca. 105 million years before the present [mybp]), and it is unlikely that long-distance dispersal accounts for the distribution of all of these. A less commonly invoked explanation, the boreotropics hypothesis, indicates that some tropical disjunctions arose during the Tertiary via high-latitude land connections when northern forests supported tropical vegetation. Malpighiaceae are widely distributed across Africa and South America and have been explained as ancient "Gondwanian aborigines" (i.e., vicariants of western Gondwanan biotas) or more recent "American colonists" (i.e., long-distance dispersalists from South America into the Old World). Fossil and phylogenetic evidence from clock-independent estimates of molecular divergence times indicate that Malpighiaceae originated in South America during the latest Cretaceous (ca. 68 mybp), in isolation from Africa, and that six amphi-Atlantic disjunctions within the family occurred during three major episodes: late Paleocene (ca. 60 mybp), latest Eocene-earliest Oligocene (ca. 34-31 mybp), and early Miocene (ca. 21-17 mybp). These age estimates reject a Gondwanan origin for Malpighiaceae, and strict dispersal scenarios ignore paleoclimate, paleoland configurations, and fossil evidence that indicates that the family once inhabited northern latitudes. Instead, these data suggest that Paleocene-Oligocene amphi-Atlantic disjunct groups in Malpighiaceae moved into North America from South America via the Caribbean Basin, crossed the North Atlantic into Eurasia, and subsequently reached the Old World Tropics during warm intervals when land configurations would have facilitated this migration. Whether Miocene migrations of evergreen thermophilic Malpighiaceae proceeded via ... |
format |
Text |
author |
Davis, Charles C. Fritsch, Peter W. Bell, Charles D. Mathews, Sarah |
author_facet |
Davis, Charles C. Fritsch, Peter W. Bell, Charles D. Mathews, Sarah |
author_sort |
Davis, Charles C. |
title |
High-latitude tertiary migrations of an exclusively tropical clade: Evidence from Malpighiaceae |
title_short |
High-latitude tertiary migrations of an exclusively tropical clade: Evidence from Malpighiaceae |
title_full |
High-latitude tertiary migrations of an exclusively tropical clade: Evidence from Malpighiaceae |
title_fullStr |
High-latitude tertiary migrations of an exclusively tropical clade: Evidence from Malpighiaceae |
title_full_unstemmed |
High-latitude tertiary migrations of an exclusively tropical clade: Evidence from Malpighiaceae |
title_sort |
high-latitude tertiary migrations of an exclusively tropical clade: evidence from malpighiaceae |
publisher |
LSU Scholarly Repository |
publishDate |
2004 |
url |
https://repository.lsu.edu/biosci_pubs/2664 https://doi.org/10.1086/383337 https://repository.lsu.edu/context/biosci_pubs/article/3663/viewcontent/2664.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Faculty Publications |
op_relation |
https://repository.lsu.edu/biosci_pubs/2664 doi:10.1086/383337 https://repository.lsu.edu/context/biosci_pubs/article/3663/viewcontent/2664.pdf |
op_doi |
https://doi.org/10.1086/383337 |
container_title |
International Journal of Plant Sciences |
container_volume |
165 |
container_issue |
S4 |
container_start_page |
S107 |
op_container_end_page |
S121 |
_version_ |
1810464370922094592 |