Data from: Morphometric analysis of Skiagia-plexus acritarchs from the early Cambrian of North Greenland ...
The Cambrian evolutionary radiations are marked by spectacular biotic turnovers and the establishment of increasingly tiered food chains. At their base are primary producers, which in the Cambrian fossil record are chiefly represented among organic-walled microfossils. The majority of these microfos...
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Online Access: | https://dx.doi.org/10.5061/dryad.zs7h44jbv https://datadryad.org/stash/dataset/doi:10.5061/dryad.zs7h44jbv |
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ftdatacite:10.5061/dryad.zs7h44jbv 2024-10-13T14:07:44+00:00 Data from: Morphometric analysis of Skiagia-plexus acritarchs from the early Cambrian of North Greenland ... Wallet, Elise Willman, Sebastian Slater, Ben J. 2022 https://dx.doi.org/10.5061/dryad.zs7h44jbv https://datadryad.org/stash/dataset/doi:10.5061/dryad.zs7h44jbv en eng Dryad https://dx.doi.org/10.5281/zenodo.6142046 Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 FOS: Earth and related environmental sciences Cambrian acritarchs Skiagia Taxonomy Phytoplankton Life cycles diversity Dataset dataset 2022 ftdatacite https://doi.org/10.5061/dryad.zs7h44jbv10.5281/zenodo.6142046 2024-10-01T11:09:16Z The Cambrian evolutionary radiations are marked by spectacular biotic turnovers and the establishment of increasingly tiered food chains. At their base are primary producers, which in the Cambrian fossil record are chiefly represented among organic-walled microfossils. The majority of these microfossil remains have traditionally been attributed to an informal category of incertae sedis called “acritarchs”, based entirely on form taxonomy. Acritarch form-taxa have been intensely used for biostratigraphy, and in large-scale studies of phytoplankton diversity. However, both prospects have been challenged by cases of taxonomic inconsistencies and over-splitting arising from the large phenotypic plasticity seen among these microfossils. The acritarch form-genus Skiagia stands as an ideal case-study to explore these taxonomic challenges, since it encompasses a number of form-species widely used in lower Cambrian biostratigraphy. Moreover, subtle morphological differences among Skiagia species were suggested to ... : Three fine-grained samples (labelled 184002, 184003, 184004) from the early Cambrian of North Greenland (Brillesø locality, Skiagia ciliosa‒Heliosphaeridium dissimilare Zone) have been collected by Grønlands Geologiske Undersøgelse in 1974. Nine palynological preparations were produced by Vidal and Peel (1993) using a standard HF acid maceration procedure (Vidal 1988). All 9 palynological preparations yielded acritarchs attributable to five species (S. scottica, S. ciliosa, S. orbiculare, S. compressa, S. ornata) that were counted and measured from photomicrographs by E. Wallet. A total of 10 continuous parameters capturing the shape of processes and size of the central body were measured for each Skiagia species. This dataset was used as a basis for principal component and discriminant analyses. A seprate dataset was compiled to include counts of discrete features related to various stages in the life cycle of Skiagia. Measurements were performed using the free software Image J; and multivariate analyses ... Dataset Greenland North Greenland DataCite Greenland Vidal ENVELOPE(19.625,19.625,69.461,69.461) |
institution |
Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
FOS: Earth and related environmental sciences Cambrian acritarchs Skiagia Taxonomy Phytoplankton Life cycles diversity |
spellingShingle |
FOS: Earth and related environmental sciences Cambrian acritarchs Skiagia Taxonomy Phytoplankton Life cycles diversity Wallet, Elise Willman, Sebastian Slater, Ben J. Data from: Morphometric analysis of Skiagia-plexus acritarchs from the early Cambrian of North Greenland ... |
topic_facet |
FOS: Earth and related environmental sciences Cambrian acritarchs Skiagia Taxonomy Phytoplankton Life cycles diversity |
description |
The Cambrian evolutionary radiations are marked by spectacular biotic turnovers and the establishment of increasingly tiered food chains. At their base are primary producers, which in the Cambrian fossil record are chiefly represented among organic-walled microfossils. The majority of these microfossil remains have traditionally been attributed to an informal category of incertae sedis called “acritarchs”, based entirely on form taxonomy. Acritarch form-taxa have been intensely used for biostratigraphy, and in large-scale studies of phytoplankton diversity. However, both prospects have been challenged by cases of taxonomic inconsistencies and over-splitting arising from the large phenotypic plasticity seen among these microfossils. The acritarch form-genus Skiagia stands as an ideal case-study to explore these taxonomic challenges, since it encompasses a number of form-species widely used in lower Cambrian biostratigraphy. Moreover, subtle morphological differences among Skiagia species were suggested to ... : Three fine-grained samples (labelled 184002, 184003, 184004) from the early Cambrian of North Greenland (Brillesø locality, Skiagia ciliosa‒Heliosphaeridium dissimilare Zone) have been collected by Grønlands Geologiske Undersøgelse in 1974. Nine palynological preparations were produced by Vidal and Peel (1993) using a standard HF acid maceration procedure (Vidal 1988). All 9 palynological preparations yielded acritarchs attributable to five species (S. scottica, S. ciliosa, S. orbiculare, S. compressa, S. ornata) that were counted and measured from photomicrographs by E. Wallet. A total of 10 continuous parameters capturing the shape of processes and size of the central body were measured for each Skiagia species. This dataset was used as a basis for principal component and discriminant analyses. A seprate dataset was compiled to include counts of discrete features related to various stages in the life cycle of Skiagia. Measurements were performed using the free software Image J; and multivariate analyses ... |
format |
Dataset |
author |
Wallet, Elise Willman, Sebastian Slater, Ben J. |
author_facet |
Wallet, Elise Willman, Sebastian Slater, Ben J. |
author_sort |
Wallet, Elise |
title |
Data from: Morphometric analysis of Skiagia-plexus acritarchs from the early Cambrian of North Greenland ... |
title_short |
Data from: Morphometric analysis of Skiagia-plexus acritarchs from the early Cambrian of North Greenland ... |
title_full |
Data from: Morphometric analysis of Skiagia-plexus acritarchs from the early Cambrian of North Greenland ... |
title_fullStr |
Data from: Morphometric analysis of Skiagia-plexus acritarchs from the early Cambrian of North Greenland ... |
title_full_unstemmed |
Data from: Morphometric analysis of Skiagia-plexus acritarchs from the early Cambrian of North Greenland ... |
title_sort |
data from: morphometric analysis of skiagia-plexus acritarchs from the early cambrian of north greenland ... |
publisher |
Dryad |
publishDate |
2022 |
url |
https://dx.doi.org/10.5061/dryad.zs7h44jbv https://datadryad.org/stash/dataset/doi:10.5061/dryad.zs7h44jbv |
long_lat |
ENVELOPE(19.625,19.625,69.461,69.461) |
geographic |
Greenland Vidal |
geographic_facet |
Greenland Vidal |
genre |
Greenland North Greenland |
genre_facet |
Greenland North Greenland |
op_relation |
https://dx.doi.org/10.5281/zenodo.6142046 |
op_rights |
Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 |
op_doi |
https://doi.org/10.5061/dryad.zs7h44jbv10.5281/zenodo.6142046 |
_version_ |
1812814250710663168 |