The Jurassic flora of Andøya, northern Norway
The Jurassic flora from Andøya, northern Norway, is described based on bulk maceration of leaf-bearing material and reexamination of all available specimens described earlier; in addition, palynology is used for biostratigraphic and floristic evaluation. Three new species are described: Nilssoniopte...
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1991
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ftindianacasci:oai:repository.ias.ac.in:6104 2023-05-15T13:25:36+02:00 The Jurassic flora of Andøya, northern Norway Manum, S. B. Bose, M. N. Vigran, J. Os 1991-07-10 http://repository.ias.ac.in/6104/ http://linkinghub.elsevier.com/retrieve/pii/003466679190026Y unknown Elsevier Science Manum, S. B. Bose, M. N. Vigran, J. Os (1991) The Jurassic flora of Andøya, northern Norway Review of Palaeobotany and Palynology, 68 (1-4). pp. 233-256. ISSN 0034-6667 Article PeerReviewed 1991 ftindianacasci 2013-01-20T09:41:56Z The Jurassic flora from Andøya, northern Norway, is described based on bulk maceration of leaf-bearing material and reexamination of all available specimens described earlier; in addition, palynology is used for biostratigraphic and floristic evaluation. Three new species are described: Nilssoniopteris norvegicus n. sp., Ginkgo dahllii n. sp. and the leafy conifer stem Ramsaia ednyana n. gen., n. sp. In connection with Ramsaia, the status of the genera Allocladus Townrow and Cyparissidium Heer is discussed and it is concluded that both should be reserved for impression fossils. Previously described species of Allocladus based on cuticles have been transferred to Ramsaia. Two floras are comprised in the material, which are of Middle Jurassic (probably Bajocian) and Late Jurassic (Kimmeridgian) age, respectively. The older and better known is dominated by the "Sciadopitys-like" conifer leaves Oswaldheeria macrophylla (Florin) Bose et Manum, followed by ginkgoalean leaves (Ginkgo, Pseudotorellia), while bennettites and other conifers are rare and cycads appear to be missing. This composition differs from Middle Jurassic floras of lower palaeolatitudes, suggesting the existence of a boreal phytogeographic province in Middle Jurassic times. The younger flora is known only from casual specimens of poorly documented stratigraphic provenance, the most significant components being two species of Mirovia, conifer leaves with Sciadopitys-like stomatal distribution. Article in Journal/Newspaper Andøya Northern Norway Indian Academy of Sciences: Publication of Fellows Andøya ENVELOPE(13.982,13.982,68.185,68.185) Heer ENVELOPE(-62.952,-62.952,-73.320,-73.320) Norway |
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Open Polar |
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Indian Academy of Sciences: Publication of Fellows |
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ftindianacasci |
language |
unknown |
description |
The Jurassic flora from Andøya, northern Norway, is described based on bulk maceration of leaf-bearing material and reexamination of all available specimens described earlier; in addition, palynology is used for biostratigraphic and floristic evaluation. Three new species are described: Nilssoniopteris norvegicus n. sp., Ginkgo dahllii n. sp. and the leafy conifer stem Ramsaia ednyana n. gen., n. sp. In connection with Ramsaia, the status of the genera Allocladus Townrow and Cyparissidium Heer is discussed and it is concluded that both should be reserved for impression fossils. Previously described species of Allocladus based on cuticles have been transferred to Ramsaia. Two floras are comprised in the material, which are of Middle Jurassic (probably Bajocian) and Late Jurassic (Kimmeridgian) age, respectively. The older and better known is dominated by the "Sciadopitys-like" conifer leaves Oswaldheeria macrophylla (Florin) Bose et Manum, followed by ginkgoalean leaves (Ginkgo, Pseudotorellia), while bennettites and other conifers are rare and cycads appear to be missing. This composition differs from Middle Jurassic floras of lower palaeolatitudes, suggesting the existence of a boreal phytogeographic province in Middle Jurassic times. The younger flora is known only from casual specimens of poorly documented stratigraphic provenance, the most significant components being two species of Mirovia, conifer leaves with Sciadopitys-like stomatal distribution. |
format |
Article in Journal/Newspaper |
author |
Manum, S. B. Bose, M. N. Vigran, J. Os |
spellingShingle |
Manum, S. B. Bose, M. N. Vigran, J. Os The Jurassic flora of Andøya, northern Norway |
author_facet |
Manum, S. B. Bose, M. N. Vigran, J. Os |
author_sort |
Manum, S. B. |
title |
The Jurassic flora of Andøya, northern Norway |
title_short |
The Jurassic flora of Andøya, northern Norway |
title_full |
The Jurassic flora of Andøya, northern Norway |
title_fullStr |
The Jurassic flora of Andøya, northern Norway |
title_full_unstemmed |
The Jurassic flora of Andøya, northern Norway |
title_sort |
jurassic flora of andøya, northern norway |
publisher |
Elsevier Science |
publishDate |
1991 |
url |
http://repository.ias.ac.in/6104/ http://linkinghub.elsevier.com/retrieve/pii/003466679190026Y |
long_lat |
ENVELOPE(13.982,13.982,68.185,68.185) ENVELOPE(-62.952,-62.952,-73.320,-73.320) |
geographic |
Andøya Heer Norway |
geographic_facet |
Andøya Heer Norway |
genre |
Andøya Northern Norway |
genre_facet |
Andøya Northern Norway |
op_relation |
Manum, S. B. Bose, M. N. Vigran, J. Os (1991) The Jurassic flora of Andøya, northern Norway Review of Palaeobotany and Palynology, 68 (1-4). pp. 233-256. ISSN 0034-6667 |
_version_ |
1766386597214814208 |