Two species of Haskinsia Grierson & Banks (Lycopsida) from the Middle Devonian of Xinjiang, China, and consideration of their palaeogeographical significance
Two species of the Devonian herbaceous lycopsid Haskinsia Grierson & Banks, H. hastata Berry & Edwards and H. sagittata Edwards & Benedetto, are reported from the Hujiersite Formation (Givetian-Middle Devonian), Xinjiang, north-west China. Both species were first described from Venezuela...
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BLACKWELL PUBLISHING
2008
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ftchinacscnigpas:oai:ir.nigpas.ac.cn:332004/19305 2023-05-15T14:04:23+02:00 Two species of Haskinsia Grierson & Banks (Lycopsida) from the Middle Devonian of Xinjiang, China, and consideration of their palaeogeographical significance Xu, Hong-He Wang, Yi Berry, Christopher M. Cai, Chong-Yang 2008-08-01 http://ir.nigpas.ac.cn/handle/332004/19305 英语 eng BLACKWELL PUBLISHING BOTANICAL JOURNAL OF THE LINNEAN SOCIETY http://ir.nigpas.ac.cn/handle/332004/19305 fossil Kazakhstan plate leaf morphology phytogeography MARIE-BYRD-LAND NEW-YORK-STATE WEST ANTARCTICA RUPPERT COAST VENEZUELA LECLERCQIA MORPHOLOGY LYCOPOD SPECIMENS GONDWANA Plant Sciences 期刊论文 2008 ftchinacscnigpas 2019-08-14T12:44:12Z Two species of the Devonian herbaceous lycopsid Haskinsia Grierson & Banks, H. hastata Berry & Edwards and H. sagittata Edwards & Benedetto, are reported from the Hujiersite Formation (Givetian-Middle Devonian), Xinjiang, north-west China. Both species were first described from Venezuela. Haskinsia hastata from Xinjiang has hastate leaves with toothed margins, and a pair of basal narrow lateral segments which curve distally. It is assigned to a new subspecies because of the toothed margins which cannot be demonstrated in Venezuelan material. The scar of the sporangium stalk is observed for the first time in specimens of H. sagittata, on the leaves of which a possible ligule structure is also shown. On the basis of our observations on both Xinjiang and Venezuelan specimens, the diagnosis of Haskinsia is enlarged to accommodate plants whose lamina has entire or toothed margins. The palaeophytogeography of the genus, otherwise known from South and North America, is discussed. (C) 2008 The Linnean Society of London. Report Antarc* Antarctica Marie Byrd Land Ruppert coast West Antarctica Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) Byrd Marie Byrd Land ENVELOPE(-130.000,-130.000,-78.000,-78.000) Ruppert Coast ENVELOPE(-144.000,-144.000,-76.000,-76.000) West Antarctica |
institution |
Open Polar |
collection |
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacscnigpas |
language |
English |
topic |
fossil Kazakhstan plate leaf morphology phytogeography MARIE-BYRD-LAND NEW-YORK-STATE WEST ANTARCTICA RUPPERT COAST VENEZUELA LECLERCQIA MORPHOLOGY LYCOPOD SPECIMENS GONDWANA Plant Sciences |
spellingShingle |
fossil Kazakhstan plate leaf morphology phytogeography MARIE-BYRD-LAND NEW-YORK-STATE WEST ANTARCTICA RUPPERT COAST VENEZUELA LECLERCQIA MORPHOLOGY LYCOPOD SPECIMENS GONDWANA Plant Sciences Xu, Hong-He Wang, Yi Berry, Christopher M. Cai, Chong-Yang Two species of Haskinsia Grierson & Banks (Lycopsida) from the Middle Devonian of Xinjiang, China, and consideration of their palaeogeographical significance |
topic_facet |
fossil Kazakhstan plate leaf morphology phytogeography MARIE-BYRD-LAND NEW-YORK-STATE WEST ANTARCTICA RUPPERT COAST VENEZUELA LECLERCQIA MORPHOLOGY LYCOPOD SPECIMENS GONDWANA Plant Sciences |
description |
Two species of the Devonian herbaceous lycopsid Haskinsia Grierson & Banks, H. hastata Berry & Edwards and H. sagittata Edwards & Benedetto, are reported from the Hujiersite Formation (Givetian-Middle Devonian), Xinjiang, north-west China. Both species were first described from Venezuela. Haskinsia hastata from Xinjiang has hastate leaves with toothed margins, and a pair of basal narrow lateral segments which curve distally. It is assigned to a new subspecies because of the toothed margins which cannot be demonstrated in Venezuelan material. The scar of the sporangium stalk is observed for the first time in specimens of H. sagittata, on the leaves of which a possible ligule structure is also shown. On the basis of our observations on both Xinjiang and Venezuelan specimens, the diagnosis of Haskinsia is enlarged to accommodate plants whose lamina has entire or toothed margins. The palaeophytogeography of the genus, otherwise known from South and North America, is discussed. (C) 2008 The Linnean Society of London. |
format |
Report |
author |
Xu, Hong-He Wang, Yi Berry, Christopher M. Cai, Chong-Yang |
author_facet |
Xu, Hong-He Wang, Yi Berry, Christopher M. Cai, Chong-Yang |
author_sort |
Xu, Hong-He |
title |
Two species of Haskinsia Grierson & Banks (Lycopsida) from the Middle Devonian of Xinjiang, China, and consideration of their palaeogeographical significance |
title_short |
Two species of Haskinsia Grierson & Banks (Lycopsida) from the Middle Devonian of Xinjiang, China, and consideration of their palaeogeographical significance |
title_full |
Two species of Haskinsia Grierson & Banks (Lycopsida) from the Middle Devonian of Xinjiang, China, and consideration of their palaeogeographical significance |
title_fullStr |
Two species of Haskinsia Grierson & Banks (Lycopsida) from the Middle Devonian of Xinjiang, China, and consideration of their palaeogeographical significance |
title_full_unstemmed |
Two species of Haskinsia Grierson & Banks (Lycopsida) from the Middle Devonian of Xinjiang, China, and consideration of their palaeogeographical significance |
title_sort |
two species of haskinsia grierson & banks (lycopsida) from the middle devonian of xinjiang, china, and consideration of their palaeogeographical significance |
publisher |
BLACKWELL PUBLISHING |
publishDate |
2008 |
url |
http://ir.nigpas.ac.cn/handle/332004/19305 |
long_lat |
ENVELOPE(-130.000,-130.000,-78.000,-78.000) ENVELOPE(-144.000,-144.000,-76.000,-76.000) |
geographic |
Byrd Marie Byrd Land Ruppert Coast West Antarctica |
geographic_facet |
Byrd Marie Byrd Land Ruppert Coast West Antarctica |
genre |
Antarc* Antarctica Marie Byrd Land Ruppert coast West Antarctica |
genre_facet |
Antarc* Antarctica Marie Byrd Land Ruppert coast West Antarctica |
op_relation |
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY http://ir.nigpas.ac.cn/handle/332004/19305 |
_version_ |
1766275434596532224 |