ANATOMICALLY PRESERVED GLOSSOPTERIS STEMS WITH ATTACHED LEAVES FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA
Stems and buds of Glossopteris skaarensis Pigg and buds of G. schopfii Pigg from the Permian Skaar Ridge locality in the central Transantarctic Mountains, Antarctica demonstrate the first anatomically preserved glossopterids known with stem/leaf attachment. Stems of G. skaarensis are 1–12 mm in diam...
Published in: | American Journal of Botany |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Wiley
1993
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Online Access: | http://dx.doi.org/10.1002/j.1537-2197.1993.tb13833.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1993.tb13833.x https://onlinelibrary.wiley.com/doi/pdf/10.1002/j.1537-2197.1993.tb13833.x http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fj.1537-2197.1993.tb13833.x |
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crwiley:10.1002/j.1537-2197.1993.tb13833.x 2024-06-09T07:40:22+00:00 ANATOMICALLY PRESERVED GLOSSOPTERIS STEMS WITH ATTACHED LEAVES FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA Pigg, Kathleen B. Taylor, Thomas N. Arizona State University National Science Foundation 1993 http://dx.doi.org/10.1002/j.1537-2197.1993.tb13833.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1993.tb13833.x https://onlinelibrary.wiley.com/doi/pdf/10.1002/j.1537-2197.1993.tb13833.x http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fj.1537-2197.1993.tb13833.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 80, issue 5, page 500-516 ISSN 0002-9122 1537-2197 journal-article 1993 crwiley https://doi.org/10.1002/j.1537-2197.1993.tb13833.x 2024-05-16T14:28:37Z Stems and buds of Glossopteris skaarensis Pigg and buds of G. schopfii Pigg from the Permian Skaar Ridge locality in the central Transantarctic Mountains, Antarctica demonstrate the first anatomically preserved glossopterids known with stem/leaf attachment. Stems of G. skaarensis are 1–12 mm in diameter ( = 3.1 mm) with a broad pith, poorly defined primary xylem, and a zone of secondary xylem up to 6 mm thick. Pycnoxylic wood conforming to Araucarioxylon Kraus is composed of tracheids with uni‐ to biseriate oval to hexagonal bordered pits on radial walls, uniseriate rays one to a few cells high, and cupressoid to taxodioid cross‐field pitting. Stems have a narrow zone of secondary phloem, aerenchymatous cortex with scattered sclereids, and sometimes a narrow periderm. Two wedge‐shaped leaf traces each bifurcate to form four strands in the base of each petiole. Small axillary branches are vascularized by double branch traces that fuse at the margin of the main axis. Buds of G. skaarensis have leaves with narrow lateral laminae and a thickened midrib containing a wide lacuna, delicate vascular strands, and a prominent hypodermis. In contrast, buds of G. schopfii have uniformly thick leaves with prominent, circular vascular bundle sheaths. These anatomical details are used to reconstruct individual types of glossopterid plants, providing new information toward understanding the ecology and evolution of this important group of Permian seed plants. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Glossopteris ENVELOPE(-113.717,-113.717,-84.733,-84.733) Skaar Ridge ENVELOPE(163.250,163.250,-84.817,-84.817) Transantarctic Mountains American Journal of Botany 80 5 500 516 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Stems and buds of Glossopteris skaarensis Pigg and buds of G. schopfii Pigg from the Permian Skaar Ridge locality in the central Transantarctic Mountains, Antarctica demonstrate the first anatomically preserved glossopterids known with stem/leaf attachment. Stems of G. skaarensis are 1–12 mm in diameter ( = 3.1 mm) with a broad pith, poorly defined primary xylem, and a zone of secondary xylem up to 6 mm thick. Pycnoxylic wood conforming to Araucarioxylon Kraus is composed of tracheids with uni‐ to biseriate oval to hexagonal bordered pits on radial walls, uniseriate rays one to a few cells high, and cupressoid to taxodioid cross‐field pitting. Stems have a narrow zone of secondary phloem, aerenchymatous cortex with scattered sclereids, and sometimes a narrow periderm. Two wedge‐shaped leaf traces each bifurcate to form four strands in the base of each petiole. Small axillary branches are vascularized by double branch traces that fuse at the margin of the main axis. Buds of G. skaarensis have leaves with narrow lateral laminae and a thickened midrib containing a wide lacuna, delicate vascular strands, and a prominent hypodermis. In contrast, buds of G. schopfii have uniformly thick leaves with prominent, circular vascular bundle sheaths. These anatomical details are used to reconstruct individual types of glossopterid plants, providing new information toward understanding the ecology and evolution of this important group of Permian seed plants. |
author2 |
Arizona State University National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Pigg, Kathleen B. Taylor, Thomas N. |
spellingShingle |
Pigg, Kathleen B. Taylor, Thomas N. ANATOMICALLY PRESERVED GLOSSOPTERIS STEMS WITH ATTACHED LEAVES FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA |
author_facet |
Pigg, Kathleen B. Taylor, Thomas N. |
author_sort |
Pigg, Kathleen B. |
title |
ANATOMICALLY PRESERVED GLOSSOPTERIS STEMS WITH ATTACHED LEAVES FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA |
title_short |
ANATOMICALLY PRESERVED GLOSSOPTERIS STEMS WITH ATTACHED LEAVES FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA |
title_full |
ANATOMICALLY PRESERVED GLOSSOPTERIS STEMS WITH ATTACHED LEAVES FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA |
title_fullStr |
ANATOMICALLY PRESERVED GLOSSOPTERIS STEMS WITH ATTACHED LEAVES FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA |
title_full_unstemmed |
ANATOMICALLY PRESERVED GLOSSOPTERIS STEMS WITH ATTACHED LEAVES FROM THE CENTRAL TRANSANTARCTIC MOUNTAINS, ANTARCTICA |
title_sort |
anatomically preserved glossopteris stems with attached leaves from the central transantarctic mountains, antarctica |
publisher |
Wiley |
publishDate |
1993 |
url |
http://dx.doi.org/10.1002/j.1537-2197.1993.tb13833.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fj.1537-2197.1993.tb13833.x https://onlinelibrary.wiley.com/doi/pdf/10.1002/j.1537-2197.1993.tb13833.x http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.1002%2Fj.1537-2197.1993.tb13833.x |
long_lat |
ENVELOPE(-113.717,-113.717,-84.733,-84.733) ENVELOPE(163.250,163.250,-84.817,-84.817) |
geographic |
Glossopteris Skaar Ridge Transantarctic Mountains |
geographic_facet |
Glossopteris Skaar Ridge Transantarctic Mountains |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
American Journal of Botany volume 80, issue 5, page 500-516 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/j.1537-2197.1993.tb13833.x |
container_title |
American Journal of Botany |
container_volume |
80 |
container_issue |
5 |
container_start_page |
500 |
op_container_end_page |
516 |
_version_ |
1801383788622643200 |