STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA III. PERMIAN SEEDS
Small, anatomically preserved gymnospermous seeds are detailed from late Permian age silicified specimens collected in the Beardmore Glacier region of Antarctica. The seeds are platyspermic with prominent, sarcotestal wings and a simple pollen chamber. The integument consists of a narrow endotesta,...
Published in: | American Journal of Botany |
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Language: | English |
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1987
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Online Access: | http://dx.doi.org/10.1002/j.1537-2197.1987.tb08694.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1987.tb08694.x https://onlinelibrary.wiley.com/doi/pdf/10.1002/j.1537-2197.1987.tb08694.x http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fj.1537-2197.1987.tb08694.x |
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crwiley:10.1002/j.1537-2197.1987.tb08694.x 2024-06-02T07:57:33+00:00 STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA III. PERMIAN SEEDS Taylor, Thomas N. Taylor, Edith L. National Science Foundation 1987 http://dx.doi.org/10.1002/j.1537-2197.1987.tb08694.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1987.tb08694.x https://onlinelibrary.wiley.com/doi/pdf/10.1002/j.1537-2197.1987.tb08694.x http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fj.1537-2197.1987.tb08694.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 74, issue 6, page 904-913 ISSN 0002-9122 1537-2197 journal-article 1987 crwiley https://doi.org/10.1002/j.1537-2197.1987.tb08694.x 2024-05-03T11:09:34Z Small, anatomically preserved gymnospermous seeds are detailed from late Permian age silicified specimens collected in the Beardmore Glacier region of Antarctica. The seeds are platyspermic with prominent, sarcotestal wings and a simple pollen chamber. The integument consists of a narrow endotesta, a two‐parted sclerotesta and a complex sarcotesta. In mature seeds, the nucellus is present as a papery layer, separated from the endotesta by a nucellar and endotestal cuticle. Cellular megagametophytes are present in many of the seeds and commonly contain two archegonia. A multicellular embryo is present within each archegonium. The embryos are at a similar stage of development and provide evidence of simple polyembryony in these seeds. Although the affinities of the seeds are not presently known, they are discussed in the context of other seeds described from Gondwana deposits, as well as the known flora from the Beardmore Glacier area. Article in Journal/Newspaper Antarc* Antarctica Beardmore Glacier Wiley Online Library Beardmore ENVELOPE(174.900,174.900,-83.350,-83.350) Beardmore Glacier ENVELOPE(170.000,170.000,-84.500,-84.500) American Journal of Botany 74 6 904 913 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Small, anatomically preserved gymnospermous seeds are detailed from late Permian age silicified specimens collected in the Beardmore Glacier region of Antarctica. The seeds are platyspermic with prominent, sarcotestal wings and a simple pollen chamber. The integument consists of a narrow endotesta, a two‐parted sclerotesta and a complex sarcotesta. In mature seeds, the nucellus is present as a papery layer, separated from the endotesta by a nucellar and endotestal cuticle. Cellular megagametophytes are present in many of the seeds and commonly contain two archegonia. A multicellular embryo is present within each archegonium. The embryos are at a similar stage of development and provide evidence of simple polyembryony in these seeds. Although the affinities of the seeds are not presently known, they are discussed in the context of other seeds described from Gondwana deposits, as well as the known flora from the Beardmore Glacier area. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Taylor, Thomas N. Taylor, Edith L. |
spellingShingle |
Taylor, Thomas N. Taylor, Edith L. STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA III. PERMIAN SEEDS |
author_facet |
Taylor, Thomas N. Taylor, Edith L. |
author_sort |
Taylor, Thomas N. |
title |
STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA III. PERMIAN SEEDS |
title_short |
STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA III. PERMIAN SEEDS |
title_full |
STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA III. PERMIAN SEEDS |
title_fullStr |
STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA III. PERMIAN SEEDS |
title_full_unstemmed |
STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA III. PERMIAN SEEDS |
title_sort |
structurally preserved fossil plants from antarctica iii. permian seeds |
publisher |
Wiley |
publishDate |
1987 |
url |
http://dx.doi.org/10.1002/j.1537-2197.1987.tb08694.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1987.tb08694.x https://onlinelibrary.wiley.com/doi/pdf/10.1002/j.1537-2197.1987.tb08694.x http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fj.1537-2197.1987.tb08694.x |
long_lat |
ENVELOPE(174.900,174.900,-83.350,-83.350) ENVELOPE(170.000,170.000,-84.500,-84.500) |
geographic |
Beardmore Beardmore Glacier |
geographic_facet |
Beardmore Beardmore Glacier |
genre |
Antarc* Antarctica Beardmore Glacier |
genre_facet |
Antarc* Antarctica Beardmore Glacier |
op_source |
American Journal of Botany volume 74, issue 6, page 904-913 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/j.1537-2197.1987.tb08694.x |
container_title |
American Journal of Botany |
container_volume |
74 |
container_issue |
6 |
container_start_page |
904 |
op_container_end_page |
913 |
_version_ |
1800740715047682048 |