A Taxodiaceous Seed Cone from the Triassic of Antarctica
A silicified seed cone is described from the lower Middle Triassic of Antarctica. The cone measures up to 3.4 cm long and 1.4 cm wide, and consists of helically arranged cone scales attached to a eustelic axis. Bract and ovuliferous scale are approximately of equal length and fused at the base. The...
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crwiley:10.2307/2446008 2024-09-15T17:41:57+00:00 A Taxodiaceous Seed Cone from the Triassic of Antarctica Yao, Xuanli Taylor, Thomas N. Taylor, Edith L. National Science Foundation 1997 http://dx.doi.org/10.2307/2446008 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F2446008 https://onlinelibrary.wiley.com/doi/pdf/10.2307/2446008 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.2307%2F2446008 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 84, issue 3, page 343-354 ISSN 0002-9122 1537-2197 journal-article 1997 crwiley https://doi.org/10.2307/2446008 2024-07-25T04:24:04Z A silicified seed cone is described from the lower Middle Triassic of Antarctica. The cone measures up to 3.4 cm long and 1.4 cm wide, and consists of helically arranged cone scales attached to a eustelic axis. Bract and ovuliferous scale are approximately of equal length and fused at the base. The bract is entire and vascularized by a single trace. The ovuliferous scale contains five distal lobes, each vascularized by a terete strand that divides to form a smaller trace to each of the five inverted ovules. Ovules are small and flattened with the three‐parted integument attenuated into oppositely positioned lateral wings. The Triassic specimens are compared with both extant and fossil conifer seed cones and believed to have their closest affinities within the Taxodiaceae. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library American Journal of Botany 84 3 343 354 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
A silicified seed cone is described from the lower Middle Triassic of Antarctica. The cone measures up to 3.4 cm long and 1.4 cm wide, and consists of helically arranged cone scales attached to a eustelic axis. Bract and ovuliferous scale are approximately of equal length and fused at the base. The bract is entire and vascularized by a single trace. The ovuliferous scale contains five distal lobes, each vascularized by a terete strand that divides to form a smaller trace to each of the five inverted ovules. Ovules are small and flattened with the three‐parted integument attenuated into oppositely positioned lateral wings. The Triassic specimens are compared with both extant and fossil conifer seed cones and believed to have their closest affinities within the Taxodiaceae. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Yao, Xuanli Taylor, Thomas N. Taylor, Edith L. |
spellingShingle |
Yao, Xuanli Taylor, Thomas N. Taylor, Edith L. A Taxodiaceous Seed Cone from the Triassic of Antarctica |
author_facet |
Yao, Xuanli Taylor, Thomas N. Taylor, Edith L. |
author_sort |
Yao, Xuanli |
title |
A Taxodiaceous Seed Cone from the Triassic of Antarctica |
title_short |
A Taxodiaceous Seed Cone from the Triassic of Antarctica |
title_full |
A Taxodiaceous Seed Cone from the Triassic of Antarctica |
title_fullStr |
A Taxodiaceous Seed Cone from the Triassic of Antarctica |
title_full_unstemmed |
A Taxodiaceous Seed Cone from the Triassic of Antarctica |
title_sort |
taxodiaceous seed cone from the triassic of antarctica |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.2307/2446008 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F2446008 https://onlinelibrary.wiley.com/doi/pdf/10.2307/2446008 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.2307%2F2446008 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
American Journal of Botany volume 84, issue 3, page 343-354 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2307/2446008 |
container_title |
American Journal of Botany |
container_volume |
84 |
container_issue |
3 |
container_start_page |
343 |
op_container_end_page |
354 |
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1810488279957504000 |