A new Oligocene Calocedrus from South China and its implications for transpacific floristic exchanges
• Premise of the Study: Calocedrus is among the genera with a typical eastern Asian–western North American disjunct distribution today. The origin of its modern distribution pattern can be better understood by examining its fossil record. • Methods: The present article reports for the first time a n...
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crwiley:10.3732/ajb.1100331 2023-12-03T10:20:17+01:00 A new Oligocene Calocedrus from South China and its implications for transpacific floristic exchanges Shi, Gongle Zhou, Zhiyan Xie, Zhiming National Natural Science Foundation of China 2012 http://dx.doi.org/10.3732/ajb.1100331 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.1100331 http://onlinelibrary.wiley.com/wol1/doi/10.3732/ajb.1100331/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 99, issue 1, page 108-120 ISSN 0002-9122 1537-2197 Plant Science Genetics Ecology, Evolution, Behavior and Systematics journal-article 2012 crwiley https://doi.org/10.3732/ajb.1100331 2023-11-09T13:46:54Z • Premise of the Study: Calocedrus is among the genera with a typical eastern Asian–western North American disjunct distribution today. The origin of its modern distribution pattern can be better understood by examining its fossil record. • Methods: The present article reports for the first time a new fossil species of this genus based on compressed material from the Oligocene Ningming Formation of Guangxi, South China, in its present major distribution area in eastern Asia. • Key Results: Calocedrus huashanensis sp. nov. is most similar to the two extant eastern Asian species, C. macrolepis and C . formosana , in gross morphology of foliage shoots and bears a close resemblance to the latter in cuticle structure. It shows a general similarity to the North American fossil representatives of the genus in alternately branched foliage shoots but is clearly different from the European Paleogene species characterized by oppositely branched leafy shoots. • Conclusions: This discovery provides new evidence for the floristic exchange of this genus between eastern Asia and North America before the Oligocene (most likely in the Eocene), presumably via the Bering land bridge. The flattened leafy shoots and dimorphic leaves with thin cuticle, open stomatal pits, and shallowly sunken guard cells of the present fossils suggest a rather humid climate during the Oligocene in the Ningming area, South China. Article in Journal/Newspaper Bering Land Bridge Wiley Online Library (via Crossref) American Journal of Botany 99 1 108 120 |
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Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Plant Science Genetics Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Plant Science Genetics Ecology, Evolution, Behavior and Systematics Shi, Gongle Zhou, Zhiyan Xie, Zhiming A new Oligocene Calocedrus from South China and its implications for transpacific floristic exchanges |
topic_facet |
Plant Science Genetics Ecology, Evolution, Behavior and Systematics |
description |
• Premise of the Study: Calocedrus is among the genera with a typical eastern Asian–western North American disjunct distribution today. The origin of its modern distribution pattern can be better understood by examining its fossil record. • Methods: The present article reports for the first time a new fossil species of this genus based on compressed material from the Oligocene Ningming Formation of Guangxi, South China, in its present major distribution area in eastern Asia. • Key Results: Calocedrus huashanensis sp. nov. is most similar to the two extant eastern Asian species, C. macrolepis and C . formosana , in gross morphology of foliage shoots and bears a close resemblance to the latter in cuticle structure. It shows a general similarity to the North American fossil representatives of the genus in alternately branched foliage shoots but is clearly different from the European Paleogene species characterized by oppositely branched leafy shoots. • Conclusions: This discovery provides new evidence for the floristic exchange of this genus between eastern Asia and North America before the Oligocene (most likely in the Eocene), presumably via the Bering land bridge. The flattened leafy shoots and dimorphic leaves with thin cuticle, open stomatal pits, and shallowly sunken guard cells of the present fossils suggest a rather humid climate during the Oligocene in the Ningming area, South China. |
author2 |
National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Shi, Gongle Zhou, Zhiyan Xie, Zhiming |
author_facet |
Shi, Gongle Zhou, Zhiyan Xie, Zhiming |
author_sort |
Shi, Gongle |
title |
A new Oligocene Calocedrus from South China and its implications for transpacific floristic exchanges |
title_short |
A new Oligocene Calocedrus from South China and its implications for transpacific floristic exchanges |
title_full |
A new Oligocene Calocedrus from South China and its implications for transpacific floristic exchanges |
title_fullStr |
A new Oligocene Calocedrus from South China and its implications for transpacific floristic exchanges |
title_full_unstemmed |
A new Oligocene Calocedrus from South China and its implications for transpacific floristic exchanges |
title_sort |
new oligocene calocedrus from south china and its implications for transpacific floristic exchanges |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.3732/ajb.1100331 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.1100331 http://onlinelibrary.wiley.com/wol1/doi/10.3732/ajb.1100331/fullpdf |
genre |
Bering Land Bridge |
genre_facet |
Bering Land Bridge |
op_source |
American Journal of Botany volume 99, issue 1, page 108-120 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.3732/ajb.1100331 |
container_title |
American Journal of Botany |
container_volume |
99 |
container_issue |
1 |
container_start_page |
108 |
op_container_end_page |
120 |
_version_ |
1784267705506856960 |