New insights into the anatomy, development, and affinities of corystosperm trees from the Triassic of Antarctica
International audience Anatomically preserved trunks and young stems of corystosperm seed ferns are described from the Triassic of Fremouw Peak, Beardmore Glacier area, Antarctica. Based on characters of the primary and secondary vascular system, these new specimens are assigned to Kykloxylon, a gen...
Published in: | Review of Palaeobotany and Palynology |
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Online Access: | https://hal.science/halsde-00961820 https://doi.org/10.1016/j.revpalbo.2014.01.002 |
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ftciradhal:oai:HAL:halsde-00961820v1 2024-02-11T09:58:28+01:00 New insights into the anatomy, development, and affinities of corystosperm trees from the Triassic of Antarctica Decombeix, Anne-Laure Bomfleur, Benjamin Taylor, Edith L. Taylor, Thomas N. Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) Department of Ecology and Evolutionary Biology, University of Kansas University of Kansas Lawrence (KU) National Science Foundation (grant OPP-10943934 to ELT and TNT) Alexander von Humboldt-Foundation (Feodor Lynen fellowship to BB) 2014 https://hal.science/halsde-00961820 https://doi.org/10.1016/j.revpalbo.2014.01.002 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2014.01.002 halsde-00961820 https://hal.science/halsde-00961820 doi:10.1016/j.revpalbo.2014.01.002 PRODINRA: 314532 WOS: 000334008300005 ISSN: 0034-6667 Review of Palaeobotany and Palynology https://hal.science/halsde-00961820 Review of Palaeobotany and Palynology, 2014, 203 (1), pp.22-34. ⟨10.1016/j.revpalbo.2014.01.002⟩ secondary growth Kykloxylon Jeffersonioxylon Triassic Antarctica Corystospermales [SDV]Life Sciences [q-bio] [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2014 ftciradhal https://doi.org/10.1016/j.revpalbo.2014.01.002 2024-01-24T17:25:49Z International audience Anatomically preserved trunks and young stems of corystosperm seed ferns are described from the Triassic of Fremouw Peak, Beardmore Glacier area, Antarctica. Based on characters of the primary and secondary vascular system, these new specimens are assigned to Kykloxylon, a genus that was established based on young stems with attached Dicroidium leaf bases. The largest specimens illustrate how some secondary growth characters, such as unequal cambial activity, appeared during later development, which enables a better comparison of Kykloxylon with trunks assigned to other corystosperm genera. Jeffersonioxylon from the Gordon Valley, Antarctica, and Cuneumxylon from South America show strong similarities with the newly described larger Kykloxylon trunks from Fremouw Peak, and might be considered congeneric. Our results provide further support for the presence of two anatomically and morphologically distinct kinds of Dicroidium-bearing trees in the Triassic vegetation of Gondwana, one with a palm-like habit and Rhexoxylon stems and the other with a more Ginkgo-like habit and Kykloxylon/Cuneumxylon-type stems Article in Journal/Newspaper Antarc* Antarctica Beardmore Glacier CIRAD: HAL (Agricultural Research for Development) Beardmore ENVELOPE(174.900,174.900,-83.350,-83.350) Beardmore Glacier ENVELOPE(170.000,170.000,-84.500,-84.500) Gordon Valley ENVELOPE(164.000,164.000,-84.383,-84.383) Fremouw Peak ENVELOPE(164.333,164.333,-84.283,-84.283) Review of Palaeobotany and Palynology 203 22 34 |
institution |
Open Polar |
collection |
CIRAD: HAL (Agricultural Research for Development) |
op_collection_id |
ftciradhal |
language |
English |
topic |
secondary growth Kykloxylon Jeffersonioxylon Triassic Antarctica Corystospermales [SDV]Life Sciences [q-bio] [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDE]Environmental Sciences |
spellingShingle |
secondary growth Kykloxylon Jeffersonioxylon Triassic Antarctica Corystospermales [SDV]Life Sciences [q-bio] [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDE]Environmental Sciences Decombeix, Anne-Laure Bomfleur, Benjamin Taylor, Edith L. Taylor, Thomas N. New insights into the anatomy, development, and affinities of corystosperm trees from the Triassic of Antarctica |
topic_facet |
secondary growth Kykloxylon Jeffersonioxylon Triassic Antarctica Corystospermales [SDV]Life Sciences [q-bio] [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE] [SDE]Environmental Sciences |
description |
International audience Anatomically preserved trunks and young stems of corystosperm seed ferns are described from the Triassic of Fremouw Peak, Beardmore Glacier area, Antarctica. Based on characters of the primary and secondary vascular system, these new specimens are assigned to Kykloxylon, a genus that was established based on young stems with attached Dicroidium leaf bases. The largest specimens illustrate how some secondary growth characters, such as unequal cambial activity, appeared during later development, which enables a better comparison of Kykloxylon with trunks assigned to other corystosperm genera. Jeffersonioxylon from the Gordon Valley, Antarctica, and Cuneumxylon from South America show strong similarities with the newly described larger Kykloxylon trunks from Fremouw Peak, and might be considered congeneric. Our results provide further support for the presence of two anatomically and morphologically distinct kinds of Dicroidium-bearing trees in the Triassic vegetation of Gondwana, one with a palm-like habit and Rhexoxylon stems and the other with a more Ginkgo-like habit and Kykloxylon/Cuneumxylon-type stems |
author2 |
Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Sud ) Department of Ecology and Evolutionary Biology, University of Kansas University of Kansas Lawrence (KU) National Science Foundation (grant OPP-10943934 to ELT and TNT) Alexander von Humboldt-Foundation (Feodor Lynen fellowship to BB) |
format |
Article in Journal/Newspaper |
author |
Decombeix, Anne-Laure Bomfleur, Benjamin Taylor, Edith L. Taylor, Thomas N. |
author_facet |
Decombeix, Anne-Laure Bomfleur, Benjamin Taylor, Edith L. Taylor, Thomas N. |
author_sort |
Decombeix, Anne-Laure |
title |
New insights into the anatomy, development, and affinities of corystosperm trees from the Triassic of Antarctica |
title_short |
New insights into the anatomy, development, and affinities of corystosperm trees from the Triassic of Antarctica |
title_full |
New insights into the anatomy, development, and affinities of corystosperm trees from the Triassic of Antarctica |
title_fullStr |
New insights into the anatomy, development, and affinities of corystosperm trees from the Triassic of Antarctica |
title_full_unstemmed |
New insights into the anatomy, development, and affinities of corystosperm trees from the Triassic of Antarctica |
title_sort |
new insights into the anatomy, development, and affinities of corystosperm trees from the triassic of antarctica |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/halsde-00961820 https://doi.org/10.1016/j.revpalbo.2014.01.002 |
long_lat |
ENVELOPE(174.900,174.900,-83.350,-83.350) ENVELOPE(170.000,170.000,-84.500,-84.500) ENVELOPE(164.000,164.000,-84.383,-84.383) ENVELOPE(164.333,164.333,-84.283,-84.283) |
geographic |
Beardmore Beardmore Glacier Gordon Valley Fremouw Peak |
geographic_facet |
Beardmore Beardmore Glacier Gordon Valley Fremouw Peak |
genre |
Antarc* Antarctica Beardmore Glacier |
genre_facet |
Antarc* Antarctica Beardmore Glacier |
op_source |
ISSN: 0034-6667 Review of Palaeobotany and Palynology https://hal.science/halsde-00961820 Review of Palaeobotany and Palynology, 2014, 203 (1), pp.22-34. ⟨10.1016/j.revpalbo.2014.01.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.revpalbo.2014.01.002 halsde-00961820 https://hal.science/halsde-00961820 doi:10.1016/j.revpalbo.2014.01.002 PRODINRA: 314532 WOS: 000334008300005 |
op_doi |
https://doi.org/10.1016/j.revpalbo.2014.01.002 |
container_title |
Review of Palaeobotany and Palynology |
container_volume |
203 |
container_start_page |
22 |
op_container_end_page |
34 |
_version_ |
1790594119402258432 |