The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales
The origins of the five groups of living seed plants, including the single relictual species Ginkgo biloba, are poorly understood, in large part because of very imperfect knowledge of extinct seed plant diversity. Here we describe well-preserved material from the Early Cretaceous of Mongolia of the...
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NATL ACAD SCIENCES
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/20560 2023-05-15T14:04:23+02:00 The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales Herrera, Fabiany Shi, Gongle Ichinnorov, Niiden Takahashi, Masamichi Bugdaeva, Eugenia V. Herendeen, Patrick S. Crane, Peter R. 2017-03-21 http://ir.nigpas.ac.cn/handle/332004/20560 https://doi.org/10.1073/pnas.1621409114 英语 eng NATL ACAD SCIENCES PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA http://ir.nigpas.ac.cn/handle/332004/20560 doi:10.1073/pnas.1621409114 Umaltolepis Cretaceous Mongolia Ginkgo WHOLE-PLANT RECONSTRUCTION SP-NOV CORYSTOSPERMALES PHYLOGENY CONIFERS RUSSIA CUPRESSACEAE SYSTEMATICS ANTARCTICA Science & Technology - Other Topics Multidisciplinary Sciences 期刊论文 2017 ftchinacscnigpas https://doi.org/10.1073/pnas.1621409114 2019-08-14T12:44:42Z The origins of the five groups of living seed plants, including the single relictual species Ginkgo biloba, are poorly understood, in large part because of very imperfect knowledge of extinct seed plant diversity. Here we describe well-preserved material from the Early Cretaceous of Mongolia of the previously enigmatic Mesozoic seed plant reproductive structure Umaltolepis, which has been presumed to be a ginkgophyte. Abundant new material shows that Umaltolepis is a seed-bearing cupule that was borne on a stalk at the tip of a short shoot. Each cupule is umbrella-like with a central column that bears a thick, resinous, four-lobed outer covering, which opens from below. Four, pendulous, winged seeds are attached to the upper part of the column and are enclosed by the cupule. Evidence from morphology, anatomy, and field association suggests that the short shoots bore simple, elongate Pseudotorellia leaves that have similar venation and resin ducts to leaves of living Ginkgo. Umaltolepis seed-bearing structures are very different from those of Ginkgo but very similar to fossils described previously as Vladimaria. Umaltolepis and Vladimaria do not closely resemble the seed-bearing structures of any living or extinct plant, but are comparable in some respects to those of certain Peltaspermales and Umkomasiales (corystosperms). Vegetative similarities of the Umaltolepis plant to Ginkgo, and reproductive similarities to extinct peltasperms and corystosperms, support previous ideas that Ginkgo may be the last survivor of a once highly diverse group of extinct plants, several of which exhibited various degrees of ovule enclosure. Report Antarc* Antarctica Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Proceedings of the National Academy of Sciences 114 12 E2385 E2391 |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
Umaltolepis Cretaceous Mongolia Ginkgo WHOLE-PLANT RECONSTRUCTION SP-NOV CORYSTOSPERMALES PHYLOGENY CONIFERS RUSSIA CUPRESSACEAE SYSTEMATICS ANTARCTICA Science & Technology - Other Topics Multidisciplinary Sciences |
spellingShingle |
Umaltolepis Cretaceous Mongolia Ginkgo WHOLE-PLANT RECONSTRUCTION SP-NOV CORYSTOSPERMALES PHYLOGENY CONIFERS RUSSIA CUPRESSACEAE SYSTEMATICS ANTARCTICA Science & Technology - Other Topics Multidisciplinary Sciences Herrera, Fabiany Shi, Gongle Ichinnorov, Niiden Takahashi, Masamichi Bugdaeva, Eugenia V. Herendeen, Patrick S. Crane, Peter R. The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales |
topic_facet |
Umaltolepis Cretaceous Mongolia Ginkgo WHOLE-PLANT RECONSTRUCTION SP-NOV CORYSTOSPERMALES PHYLOGENY CONIFERS RUSSIA CUPRESSACEAE SYSTEMATICS ANTARCTICA Science & Technology - Other Topics Multidisciplinary Sciences |
description |
The origins of the five groups of living seed plants, including the single relictual species Ginkgo biloba, are poorly understood, in large part because of very imperfect knowledge of extinct seed plant diversity. Here we describe well-preserved material from the Early Cretaceous of Mongolia of the previously enigmatic Mesozoic seed plant reproductive structure Umaltolepis, which has been presumed to be a ginkgophyte. Abundant new material shows that Umaltolepis is a seed-bearing cupule that was borne on a stalk at the tip of a short shoot. Each cupule is umbrella-like with a central column that bears a thick, resinous, four-lobed outer covering, which opens from below. Four, pendulous, winged seeds are attached to the upper part of the column and are enclosed by the cupule. Evidence from morphology, anatomy, and field association suggests that the short shoots bore simple, elongate Pseudotorellia leaves that have similar venation and resin ducts to leaves of living Ginkgo. Umaltolepis seed-bearing structures are very different from those of Ginkgo but very similar to fossils described previously as Vladimaria. Umaltolepis and Vladimaria do not closely resemble the seed-bearing structures of any living or extinct plant, but are comparable in some respects to those of certain Peltaspermales and Umkomasiales (corystosperms). Vegetative similarities of the Umaltolepis plant to Ginkgo, and reproductive similarities to extinct peltasperms and corystosperms, support previous ideas that Ginkgo may be the last survivor of a once highly diverse group of extinct plants, several of which exhibited various degrees of ovule enclosure. |
format |
Report |
author |
Herrera, Fabiany Shi, Gongle Ichinnorov, Niiden Takahashi, Masamichi Bugdaeva, Eugenia V. Herendeen, Patrick S. Crane, Peter R. |
author_facet |
Herrera, Fabiany Shi, Gongle Ichinnorov, Niiden Takahashi, Masamichi Bugdaeva, Eugenia V. Herendeen, Patrick S. Crane, Peter R. |
author_sort |
Herrera, Fabiany |
title |
The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales |
title_short |
The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales |
title_full |
The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales |
title_fullStr |
The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales |
title_full_unstemmed |
The presumed ginkgophyte Umaltolepis has seed-bearing structures resembling those of Peltaspermales and Umkomasiales |
title_sort |
presumed ginkgophyte umaltolepis has seed-bearing structures resembling those of peltaspermales and umkomasiales |
publisher |
NATL ACAD SCIENCES |
publishDate |
2017 |
url |
http://ir.nigpas.ac.cn/handle/332004/20560 https://doi.org/10.1073/pnas.1621409114 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA http://ir.nigpas.ac.cn/handle/332004/20560 doi:10.1073/pnas.1621409114 |
op_doi |
https://doi.org/10.1073/pnas.1621409114 |
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Proceedings of the National Academy of Sciences |
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114 |
container_issue |
12 |
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E2385 |
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E2391 |
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1766275437185466368 |