Morphological variability of peteinoid acritarchs from the Middle Ordovician of Öland, Sweden, and implications for acritarch classification
(2021) In Palynology 45(4). p.705-715- Abstract
Investigation of large populations of peteinoid acritarchs recovered from Middle Ordovician strata of the Hälludden and Horns Udde quarry sections (Öland, Sweden) allows for statistical analyses based on morphometric measurements. The results indicate the presence of assemblages with a continuous variability of morphotypes, thus a distinction of different peteinoid acritarch taxa in the sections proved to be impossible. This challenges the currently accepted classification based on a differentiation into the three genera Peteinosphaeridium, Cycloposphaeridium and Liliosphaeridium, and a multitude of different species; individual taxa are essentially arbitrary as morphotypes intergrade. Investigations on modern dinoflagellates show that... (More)
Investigation of large populations of peteinoid acritarchs recovered from Middle Ordovician strata of the Hälludden and Horns Udde quarry sections (Öland, Sweden) allows for statistical analyses based on morphometric measurements. The results indicate the presence of assemblages with a continuous variability of morphotypes, thus a distinction of different peteinoid acritarch taxa in the sections proved to be impossible. This challenges the currently accepted classification based on a differentiation into the three genera Peteinosphaeridium, Cycloposphaeridium and Liliosphaeridium, and a multitude of different species; individual taxa are essentially arbitrary as morphotypes intergrade. Investigations on modern dinoflagellates show that these can develop variable cyst morphologies depending on environmental factors. By analogy, it can be hypothesised that the different morphologies observed among the peteinoid acritarchs from Öland are cysts produced by only very few phytoplanktic organisms (or even a single species) with high morphological variability.
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- author
- Kroeck, David M. ; Eriksson, Mats E. LU ; Lindskog, Anders LU ; Munnecke, Axel ; Dubois, Michel ; Régnier, Sylvie and Servais, Thomas
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- ecophenotypism, Palaeozoic Darriwilian, Phytoplankton, taxonomy
- in
- Palynology
- volume
- 45
- issue
- 4
- pages
- 11 pages
- publisher
- Taylor & Francis
- external identifiers
-
- scopus:85106213213
- ISSN
- 0191-6122
- DOI
- 10.1080/01916122.2021.1916785
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2021 AASP–The Palynological Society.
- id
- 5f71be11-f33d-4fce-a450-9b1fe551b0df
- date added to LUP
- 2021-12-07 16:54:46
- date last changed
- 2023-02-02 08:00:51
@article{5f71be11-f33d-4fce-a450-9b1fe551b0df, abstract = {{<p>Investigation of large populations of peteinoid acritarchs recovered from Middle Ordovician strata of the Hälludden and Horns Udde quarry sections (Öland, Sweden) allows for statistical analyses based on morphometric measurements. The results indicate the presence of assemblages with a continuous variability of morphotypes, thus a distinction of different peteinoid acritarch taxa in the sections proved to be impossible. This challenges the currently accepted classification based on a differentiation into the three genera Peteinosphaeridium, Cycloposphaeridium and Liliosphaeridium, and a multitude of different species; individual taxa are essentially arbitrary as morphotypes intergrade. Investigations on modern dinoflagellates show that these can develop variable cyst morphologies depending on environmental factors. By analogy, it can be hypothesised that the different morphologies observed among the peteinoid acritarchs from Öland are cysts produced by only very few phytoplanktic organisms (or even a single species) with high morphological variability.</p>}}, author = {{Kroeck, David M. and Eriksson, Mats E. and Lindskog, Anders and Munnecke, Axel and Dubois, Michel and Régnier, Sylvie and Servais, Thomas}}, issn = {{0191-6122}}, keywords = {{ecophenotypism; Palaeozoic Darriwilian; Phytoplankton; taxonomy}}, language = {{eng}}, number = {{4}}, pages = {{705--715}}, publisher = {{Taylor & Francis}}, series = {{Palynology}}, title = {{Morphological variability of peteinoid acritarchs from the Middle Ordovician of Öland, Sweden, and implications for acritarch classification}}, url = {{http://dx.doi.org/10.1080/01916122.2021.1916785}}, doi = {{10.1080/01916122.2021.1916785}}, volume = {{45}}, year = {{2021}}, }