Reinvestigation of the Late Devonian Shougangia bella and new insights into the evolution of fern-like plants
Shougangia bella from the Late Devonian (Famennian) of South China is a fern-like plant known for its morphology and now provided with anatomy and a reconstruction. Its stems contain a dissected stele with a four-ribbed and an elongate-curved primary xylem segments changing to three elongate and sli...
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Online Access: | http://ir.nigpas.ac.cn/handle/332004/18767 http://ir.nigpas.ac.cn/handle/332004/18768 https://doi.org/10.1080/14772019.2017.1289269 |
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/18768 2023-05-15T15:09:44+02:00 Reinvestigation of the Late Devonian Shougangia bella and new insights into the evolution of fern-like plants Wang, De-Ming Zhang, Ying-Ying Liu, Le Xu, Hong-He (徐洪河) Qin, Min Liu, Lu 2018 http://ir.nigpas.ac.cn/handle/332004/18767 http://ir.nigpas.ac.cn/handle/332004/18768 https://doi.org/10.1080/14772019.2017.1289269 英语 eng TAYLOR & FRANCIS LTD JOURNAL OF SYSTEMATIC PALAEONTOLOGY http://ir.nigpas.ac.cn/handle/332004/18767 http://ir.nigpas.ac.cn/handle/332004/18768 doi:10.1080/14772019.2017.1289269 Dissected Stele Fern-like Plants Leaf Evolution Monilophytes Secondary Xylem Wutong Formation New-york-state Sp-nov Denglongia-hubeiensis Southeastern Morocco Pietzschia-levis Arctic Canada West-virginia South China Anatomy Cladoxylopsida Evolutionary Biology Paleontology 期刊论文 2018 ftchinacscnigpas https://doi.org/10.1080/14772019.2017.1289269 2019-09-27T00:06:43Z Shougangia bella from the Late Devonian (Famennian) of South China is a fern-like plant known for its morphology and now provided with anatomy and a reconstruction. Its stems contain a dissected stele with a four-ribbed and an elongate-curved primary xylem segments changing to three elongate and slightly curved segments. Primary branches have a dissected stele with three similar primary xylem segments as in stems. The primary xylem of the stems and primary branches is mesarch, and individual primary xylem segments bear peripheral protoxylem strands and are surrounded by secondary xylem. Shougangia is anatomically compared with fern-like plants, zygopterid ferns and early seed plants, verifying its uncertain affinity at class and order levels as suggested by morphology, or representing a new order within the Cladoxylopsida. On the basis of anatomy and branching pattern, it is emphasized that most fern-like plants appear evolutionarily closely related to iridopteridaleans. Secondary xylem is involved not only in mechanical support, but also more likely in enhancing water supply for fern-like plants including Shougangia. By the Late Devonian, besides the abrupt drop of atmospheric CO2 levels, the presence of secondary xylem may correlate well with the primary radiation of leaves (megaphylls) of euphyllophytes (e.g. fern-like plants, sphenopsids, progymnosperms and seed plants). Report Arctic Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Arctic Canada Journal of Systematic Palaeontology 16 4 309 324 |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
Dissected Stele Fern-like Plants Leaf Evolution Monilophytes Secondary Xylem Wutong Formation New-york-state Sp-nov Denglongia-hubeiensis Southeastern Morocco Pietzschia-levis Arctic Canada West-virginia South China Anatomy Cladoxylopsida Evolutionary Biology Paleontology |
spellingShingle |
Dissected Stele Fern-like Plants Leaf Evolution Monilophytes Secondary Xylem Wutong Formation New-york-state Sp-nov Denglongia-hubeiensis Southeastern Morocco Pietzschia-levis Arctic Canada West-virginia South China Anatomy Cladoxylopsida Evolutionary Biology Paleontology Wang, De-Ming Zhang, Ying-Ying Liu, Le Xu, Hong-He (徐洪河) Qin, Min Liu, Lu Reinvestigation of the Late Devonian Shougangia bella and new insights into the evolution of fern-like plants |
topic_facet |
Dissected Stele Fern-like Plants Leaf Evolution Monilophytes Secondary Xylem Wutong Formation New-york-state Sp-nov Denglongia-hubeiensis Southeastern Morocco Pietzschia-levis Arctic Canada West-virginia South China Anatomy Cladoxylopsida Evolutionary Biology Paleontology |
description |
Shougangia bella from the Late Devonian (Famennian) of South China is a fern-like plant known for its morphology and now provided with anatomy and a reconstruction. Its stems contain a dissected stele with a four-ribbed and an elongate-curved primary xylem segments changing to three elongate and slightly curved segments. Primary branches have a dissected stele with three similar primary xylem segments as in stems. The primary xylem of the stems and primary branches is mesarch, and individual primary xylem segments bear peripheral protoxylem strands and are surrounded by secondary xylem. Shougangia is anatomically compared with fern-like plants, zygopterid ferns and early seed plants, verifying its uncertain affinity at class and order levels as suggested by morphology, or representing a new order within the Cladoxylopsida. On the basis of anatomy and branching pattern, it is emphasized that most fern-like plants appear evolutionarily closely related to iridopteridaleans. Secondary xylem is involved not only in mechanical support, but also more likely in enhancing water supply for fern-like plants including Shougangia. By the Late Devonian, besides the abrupt drop of atmospheric CO2 levels, the presence of secondary xylem may correlate well with the primary radiation of leaves (megaphylls) of euphyllophytes (e.g. fern-like plants, sphenopsids, progymnosperms and seed plants). |
format |
Report |
author |
Wang, De-Ming Zhang, Ying-Ying Liu, Le Xu, Hong-He (徐洪河) Qin, Min Liu, Lu |
author_facet |
Wang, De-Ming Zhang, Ying-Ying Liu, Le Xu, Hong-He (徐洪河) Qin, Min Liu, Lu |
author_sort |
Wang, De-Ming |
title |
Reinvestigation of the Late Devonian Shougangia bella and new insights into the evolution of fern-like plants |
title_short |
Reinvestigation of the Late Devonian Shougangia bella and new insights into the evolution of fern-like plants |
title_full |
Reinvestigation of the Late Devonian Shougangia bella and new insights into the evolution of fern-like plants |
title_fullStr |
Reinvestigation of the Late Devonian Shougangia bella and new insights into the evolution of fern-like plants |
title_full_unstemmed |
Reinvestigation of the Late Devonian Shougangia bella and new insights into the evolution of fern-like plants |
title_sort |
reinvestigation of the late devonian shougangia bella and new insights into the evolution of fern-like plants |
publisher |
TAYLOR & FRANCIS LTD |
publishDate |
2018 |
url |
http://ir.nigpas.ac.cn/handle/332004/18767 http://ir.nigpas.ac.cn/handle/332004/18768 https://doi.org/10.1080/14772019.2017.1289269 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
JOURNAL OF SYSTEMATIC PALAEONTOLOGY http://ir.nigpas.ac.cn/handle/332004/18767 http://ir.nigpas.ac.cn/handle/332004/18768 doi:10.1080/14772019.2017.1289269 |
op_doi |
https://doi.org/10.1080/14772019.2017.1289269 |
container_title |
Journal of Systematic Palaeontology |
container_volume |
16 |
container_issue |
4 |
container_start_page |
309 |
op_container_end_page |
324 |
_version_ |
1766340864350617600 |