Data from: Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea
Triassic megaspore assemblages from Svalbard, Arctic Norway, are described for the first time based on the analysis of the Upper Triassic (Carnian–Norian/Rhaetian) Kapp Toscana Group on the island of Hopen. Two megaspore zones are described: the late Carnian ‘Dijkstraisporites beutleri Zone’ (undiff...
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ftdryad:oai:v1.datadryad.org:10255/dryad.185466 2023-05-15T15:00:43+02:00 Data from: Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea Paterson, Niall Morris, Peter Mangerud, Gunn Svalbard Barents Sea Arctic Norway Hopen Triassic Carnian Norian Rhaetian 2019-02-15T17:57:26Z http://hdl.handle.net/10255/dryad.185466 https://doi.org/10.5061/dryad.1mn51s6 unknown doi:10.5061/dryad.1mn51s6/1 doi:10.5061/dryad.1mn51s6/2 doi:10.5061/dryad.1mn51s6/3 doi:10.5061/dryad.1mn51s6/4 doi:10.5061/dryad.1mn51s6/5 doi:10.5061/dryad.1mn51s6/6 doi:10.5061/dryad.1mn51s6/7 doi:10.1002/spp2.1251 doi:10.5061/dryad.1mn51s6 Paterson NW, Morris PH, Mangerud G (2019) Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea. Papers in Palaeontology, online in advance of print. http://hdl.handle.net/10255/dryad.185466 megaspores palynology micro-biofacies Article 2019 ftdryad https://doi.org/10.5061/dryad.1mn51s6 https://doi.org/10.5061/dryad.1mn51s6/1 https://doi.org/10.5061/dryad.1mn51s6/2 https://doi.org/10.5061/dryad.1mn51s6/3 https://doi.org/10.5061/dryad.1mn51s6/4 https://doi.org/10.5061/dryad.1mn51s6/5 https 2020-01-01T16:12:05Z Triassic megaspore assemblages from Svalbard, Arctic Norway, are described for the first time based on the analysis of the Upper Triassic (Carnian–Norian/Rhaetian) Kapp Toscana Group on the island of Hopen. Two megaspore zones are described: the late Carnian ‘Dijkstraisporites beutleri Zone’ (undifferentiated De Geerdalen Formation), and the Norian/Rhaetian ‘D. beutleri – Verrutriletes preutilis Zone’ (Svenskøya Formation). Megaspores are attributed to heterosporous lycopsids, and likely correspond to the microspore Aratrisporites, which was observed in palynological preparations. Megaspore occurrence was highest in delta-plain and associated with lake-mire deposits. However, their close association with marine microfossils suggests episodic marine influence, and is consistent with previous interpretations that some Triassic lycopsids occupied marginal marine habitats. The absence of megaspores in the overlying Hopen Member and Flatsalen Formation is likely related to a marine transgression during the early Norian, as indicated by the recovery of low diversity assemblages of agglutinated foraminifera. The transition to ostracod-dominated microfaunas in the middle part of the formation is consistent with a regionally extensive maximum flooding surface, prior to a return to megaspore-dominated assemblages in the fluvio-deltaic deposits of the Svenskøya Formation. Despite the abundance of their mega- and microspores, lycopsid fossils are almost entirely absent within palaeobotanical collections from the island, which we ascribe to their herbaceous habit and consequent low preservation potential. The results of this study show lycopsids to be an important component of the local ecosystem and thus contribute to a more complete understanding of the Late Triassic floras of northern-most Pangaea. Article in Journal/Newspaper Arctic Barents Sea Foraminifera* Hopen Svalbard Svenskøya Hopen Dryad Digital Repository (Duke University) Arctic Barents Sea De Geerdalen ENVELOPE(16.368,16.368,78.296,78.296) Flatsalen ENVELOPE(25.500,25.500,76.700,76.700) Hopen ENVELOPE(9.279,9.279,63.379,63.379) Kapp Toscana ENVELOPE(15.075,15.075,77.553,77.553) Norway Svalbard |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
megaspores palynology micro-biofacies |
spellingShingle |
megaspores palynology micro-biofacies Paterson, Niall Morris, Peter Mangerud, Gunn Data from: Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea |
topic_facet |
megaspores palynology micro-biofacies |
description |
Triassic megaspore assemblages from Svalbard, Arctic Norway, are described for the first time based on the analysis of the Upper Triassic (Carnian–Norian/Rhaetian) Kapp Toscana Group on the island of Hopen. Two megaspore zones are described: the late Carnian ‘Dijkstraisporites beutleri Zone’ (undifferentiated De Geerdalen Formation), and the Norian/Rhaetian ‘D. beutleri – Verrutriletes preutilis Zone’ (Svenskøya Formation). Megaspores are attributed to heterosporous lycopsids, and likely correspond to the microspore Aratrisporites, which was observed in palynological preparations. Megaspore occurrence was highest in delta-plain and associated with lake-mire deposits. However, their close association with marine microfossils suggests episodic marine influence, and is consistent with previous interpretations that some Triassic lycopsids occupied marginal marine habitats. The absence of megaspores in the overlying Hopen Member and Flatsalen Formation is likely related to a marine transgression during the early Norian, as indicated by the recovery of low diversity assemblages of agglutinated foraminifera. The transition to ostracod-dominated microfaunas in the middle part of the formation is consistent with a regionally extensive maximum flooding surface, prior to a return to megaspore-dominated assemblages in the fluvio-deltaic deposits of the Svenskøya Formation. Despite the abundance of their mega- and microspores, lycopsid fossils are almost entirely absent within palaeobotanical collections from the island, which we ascribe to their herbaceous habit and consequent low preservation potential. The results of this study show lycopsids to be an important component of the local ecosystem and thus contribute to a more complete understanding of the Late Triassic floras of northern-most Pangaea. |
format |
Article in Journal/Newspaper |
author |
Paterson, Niall Morris, Peter Mangerud, Gunn |
author_facet |
Paterson, Niall Morris, Peter Mangerud, Gunn |
author_sort |
Paterson, Niall |
title |
Data from: Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea |
title_short |
Data from: Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea |
title_full |
Data from: Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea |
title_fullStr |
Data from: Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea |
title_full_unstemmed |
Data from: Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea |
title_sort |
data from: lycopsid megaspores from the upper triassic of svalbard and their relationship to the floras and palaeoenvironments of northern pangaea |
publishDate |
2019 |
url |
http://hdl.handle.net/10255/dryad.185466 https://doi.org/10.5061/dryad.1mn51s6 |
op_coverage |
Svalbard Barents Sea Arctic Norway Hopen Triassic Carnian Norian Rhaetian |
long_lat |
ENVELOPE(16.368,16.368,78.296,78.296) ENVELOPE(25.500,25.500,76.700,76.700) ENVELOPE(9.279,9.279,63.379,63.379) ENVELOPE(15.075,15.075,77.553,77.553) |
geographic |
Arctic Barents Sea De Geerdalen Flatsalen Hopen Kapp Toscana Norway Svalbard |
geographic_facet |
Arctic Barents Sea De Geerdalen Flatsalen Hopen Kapp Toscana Norway Svalbard |
genre |
Arctic Barents Sea Foraminifera* Hopen Svalbard Svenskøya Hopen |
genre_facet |
Arctic Barents Sea Foraminifera* Hopen Svalbard Svenskøya Hopen |
op_relation |
doi:10.5061/dryad.1mn51s6/1 doi:10.5061/dryad.1mn51s6/2 doi:10.5061/dryad.1mn51s6/3 doi:10.5061/dryad.1mn51s6/4 doi:10.5061/dryad.1mn51s6/5 doi:10.5061/dryad.1mn51s6/6 doi:10.5061/dryad.1mn51s6/7 doi:10.1002/spp2.1251 doi:10.5061/dryad.1mn51s6 Paterson NW, Morris PH, Mangerud G (2019) Lycopsid megaspores from the Upper Triassic of Svalbard and their relationship to the floras and palaeoenvironments of northern Pangaea. Papers in Palaeontology, online in advance of print. http://hdl.handle.net/10255/dryad.185466 |
op_doi |
https://doi.org/10.5061/dryad.1mn51s6 https://doi.org/10.5061/dryad.1mn51s6/1 https://doi.org/10.5061/dryad.1mn51s6/2 https://doi.org/10.5061/dryad.1mn51s6/3 https://doi.org/10.5061/dryad.1mn51s6/4 https://doi.org/10.5061/dryad.1mn51s6/5 https |
_version_ |
1766332793968656384 |