A new species of Thuja (Cupressaceae) from the Late Cretaceous of Alaska: implications of being evergreen in a polar environment
A branch bearing a number of seed cones of Thuja L. (Cupressaceae) has been recovered from a Late Cretaceous (Turonian) deposit from the North Slope of Alaska. This reproductive material is the oldest known for the genus and is indistinguishable from the seed cones of most of the extant species of T...
Published in: | American Journal of Botany |
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Online Access: | http://dx.doi.org/10.3732/ajb.90.2.167 https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.90.2.167 |
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crwiley:10.3732/ajb.90.2.167 2024-06-02T08:11:52+00:00 A new species of Thuja (Cupressaceae) from the Late Cretaceous of Alaska: implications of being evergreen in a polar environment LePage, Ben A. Andrew W. Mellon Foundation 2003 http://dx.doi.org/10.3732/ajb.90.2.167 https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.90.2.167 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 90, issue 2, page 167-174 ISSN 0002-9122 1537-2197 journal-article 2003 crwiley https://doi.org/10.3732/ajb.90.2.167 2024-05-06T07:01:13Z A branch bearing a number of seed cones of Thuja L. (Cupressaceae) has been recovered from a Late Cretaceous (Turonian) deposit from the North Slope of Alaska. This reproductive material is the oldest known for the genus and is indistinguishable from the seed cones of most of the extant species of Thuja , indicating that the seed cones of this Alaskan fossil Thuja had attained a modern morphological appearance early in the evolutionary history of the genus. From a physiological standpoint, the ability of modern species of Thuja to tolerate cold to freezing conditions and the ability of fossil representatives of the genus to survive periods of extended darkness during the polar winters supports the contention that the polar winters during the Late Mesozoic and early Cenozoic were cold. Article in Journal/Newspaper north slope Alaska Wiley Online Library American Journal of Botany 90 2 167 174 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
A branch bearing a number of seed cones of Thuja L. (Cupressaceae) has been recovered from a Late Cretaceous (Turonian) deposit from the North Slope of Alaska. This reproductive material is the oldest known for the genus and is indistinguishable from the seed cones of most of the extant species of Thuja , indicating that the seed cones of this Alaskan fossil Thuja had attained a modern morphological appearance early in the evolutionary history of the genus. From a physiological standpoint, the ability of modern species of Thuja to tolerate cold to freezing conditions and the ability of fossil representatives of the genus to survive periods of extended darkness during the polar winters supports the contention that the polar winters during the Late Mesozoic and early Cenozoic were cold. |
author2 |
Andrew W. Mellon Foundation |
format |
Article in Journal/Newspaper |
author |
LePage, Ben A. |
spellingShingle |
LePage, Ben A. A new species of Thuja (Cupressaceae) from the Late Cretaceous of Alaska: implications of being evergreen in a polar environment |
author_facet |
LePage, Ben A. |
author_sort |
LePage, Ben A. |
title |
A new species of Thuja (Cupressaceae) from the Late Cretaceous of Alaska: implications of being evergreen in a polar environment |
title_short |
A new species of Thuja (Cupressaceae) from the Late Cretaceous of Alaska: implications of being evergreen in a polar environment |
title_full |
A new species of Thuja (Cupressaceae) from the Late Cretaceous of Alaska: implications of being evergreen in a polar environment |
title_fullStr |
A new species of Thuja (Cupressaceae) from the Late Cretaceous of Alaska: implications of being evergreen in a polar environment |
title_full_unstemmed |
A new species of Thuja (Cupressaceae) from the Late Cretaceous of Alaska: implications of being evergreen in a polar environment |
title_sort |
new species of thuja (cupressaceae) from the late cretaceous of alaska: implications of being evergreen in a polar environment |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.3732/ajb.90.2.167 https://onlinelibrary.wiley.com/doi/full/10.3732/ajb.90.2.167 |
genre |
north slope Alaska |
genre_facet |
north slope Alaska |
op_source |
American Journal of Botany volume 90, issue 2, page 167-174 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.3732/ajb.90.2.167 |
container_title |
American Journal of Botany |
container_volume |
90 |
container_issue |
2 |
container_start_page |
167 |
op_container_end_page |
174 |
_version_ |
1800758151359758336 |