Anatomically preserved leaves of the conifer notophytum krauselii (Podocarpaceae) from the Triassic of Antarctica
Permineralized leaves of the Triassic podocarpaceous conifer Notophytum krauselii are described from the Fremouw Formation of Antarctica. The leaves are elongate and apetiolate with 8–12 parallel veins. The adaxial epidermis consists of rows of rectangular to pentagonal cells; the abaxial epidermis...
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crwiley:10.2307/2446541 2024-10-13T14:01:54+00:00 Anatomically preserved leaves of the conifer notophytum krauselii (Podocarpaceae) from the Triassic of Antarctica Axsmith, Brian J. Taylor, Thomas N. Taylor, Edith L. National Science Foundation 1998 http://dx.doi.org/10.2307/2446541 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F2446541 https://onlinelibrary.wiley.com/doi/pdf/10.2307/2446541 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.2307%2F2446541 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 85, issue 5, page 704-713 ISSN 0002-9122 1537-2197 journal-article 1998 crwiley https://doi.org/10.2307/2446541 2024-09-17T04:48:54Z Permineralized leaves of the Triassic podocarpaceous conifer Notophytum krauselii are described from the Fremouw Formation of Antarctica. The leaves are elongate and apetiolate with 8–12 parallel veins. The adaxial epidermis consists of rows of rectangular to pentagonal cells; the abaxial epidermis is papillate. Longitudinally oriented stomata occur on both surfaces. An adaxial palisade layer is present and auxiliary sclereids are common in the mesophyll. The vascular bundles have a weakly defined sheath and are flanked by transfusion tracheids. Bundles in the basipetal area of the leaf are capped by sclerotic tissue and subtended by resin canals. These leaves are superficially similar to those of the extant podocarp genus Nageia, but probably represent a distinct acquisition of this leaf type within the Podocarpaceae. Notophytum leaves are similar to the common compression fossil Heidiphyllum elongatum and may be closely related or even conspecific. Evidence from Antarctica suggests that Heidiphyllum and the seed cone Telemachus were produced by the same plant, and may be closely related to several other early Mesozoic conifers with multiveined leaves. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library American Journal of Botany 85 5 704 713 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Permineralized leaves of the Triassic podocarpaceous conifer Notophytum krauselii are described from the Fremouw Formation of Antarctica. The leaves are elongate and apetiolate with 8–12 parallel veins. The adaxial epidermis consists of rows of rectangular to pentagonal cells; the abaxial epidermis is papillate. Longitudinally oriented stomata occur on both surfaces. An adaxial palisade layer is present and auxiliary sclereids are common in the mesophyll. The vascular bundles have a weakly defined sheath and are flanked by transfusion tracheids. Bundles in the basipetal area of the leaf are capped by sclerotic tissue and subtended by resin canals. These leaves are superficially similar to those of the extant podocarp genus Nageia, but probably represent a distinct acquisition of this leaf type within the Podocarpaceae. Notophytum leaves are similar to the common compression fossil Heidiphyllum elongatum and may be closely related or even conspecific. Evidence from Antarctica suggests that Heidiphyllum and the seed cone Telemachus were produced by the same plant, and may be closely related to several other early Mesozoic conifers with multiveined leaves. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Axsmith, Brian J. Taylor, Thomas N. Taylor, Edith L. |
spellingShingle |
Axsmith, Brian J. Taylor, Thomas N. Taylor, Edith L. Anatomically preserved leaves of the conifer notophytum krauselii (Podocarpaceae) from the Triassic of Antarctica |
author_facet |
Axsmith, Brian J. Taylor, Thomas N. Taylor, Edith L. |
author_sort |
Axsmith, Brian J. |
title |
Anatomically preserved leaves of the conifer notophytum krauselii (Podocarpaceae) from the Triassic of Antarctica |
title_short |
Anatomically preserved leaves of the conifer notophytum krauselii (Podocarpaceae) from the Triassic of Antarctica |
title_full |
Anatomically preserved leaves of the conifer notophytum krauselii (Podocarpaceae) from the Triassic of Antarctica |
title_fullStr |
Anatomically preserved leaves of the conifer notophytum krauselii (Podocarpaceae) from the Triassic of Antarctica |
title_full_unstemmed |
Anatomically preserved leaves of the conifer notophytum krauselii (Podocarpaceae) from the Triassic of Antarctica |
title_sort |
anatomically preserved leaves of the conifer notophytum krauselii (podocarpaceae) from the triassic of antarctica |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.2307/2446541 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F2446541 https://onlinelibrary.wiley.com/doi/pdf/10.2307/2446541 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.2307%2F2446541 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
American Journal of Botany volume 85, issue 5, page 704-713 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2307/2446541 |
container_title |
American Journal of Botany |
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85 |
container_issue |
5 |
container_start_page |
704 |
op_container_end_page |
713 |
_version_ |
1812813585487757312 |