The fossil alga Chaetocladus gracilis revisited : new material from the Silurian of Sweden
(2020) In GFF 142(4). p.304-308- Abstract
In 2006, a new species of non-calcified dasycladalean alga, Chaetocladus gracilis, from the upper Silurian of Skåne (Scania), southernmost Sweden, was erected. The original description was based on a single incomplete fossil recovered from the abandoned limestone quarry at Bjärsjölagård, a classic geologic locality in Scania. Here we present four additional and, importantly, more complete specimens from this same site and type stratum. This new material largely corroborates the general anatomical features of C. gracilis, but also adds some intricate details, most notably with regards to the external sheet-like phytoleim and organisation of the laterals. Elemental mapping confirmed an expected carbonaceous composition of the fossils,... (More)
In 2006, a new species of non-calcified dasycladalean alga, Chaetocladus gracilis, from the upper Silurian of Skåne (Scania), southernmost Sweden, was erected. The original description was based on a single incomplete fossil recovered from the abandoned limestone quarry at Bjärsjölagård, a classic geologic locality in Scania. Here we present four additional and, importantly, more complete specimens from this same site and type stratum. This new material largely corroborates the general anatomical features of C. gracilis, but also adds some intricate details, most notably with regards to the external sheet-like phytoleim and organisation of the laterals. Elemental mapping confirmed an expected carbonaceous composition of the fossils, which are embedded in a calcareous mudstone. These additional fossils show that the originally described specimen was not a singular occurrence at this locality. Based on the state of preservation of our algal fossils, we note that the mudstone facies of the Ludlow Bjärsjölagård Limestone Member of the Klinta Formation (Öved-Ramsåsa Group), from which all C. gracilis have been recovered, share characteristics with deposits typically referred to as “algal-Lagerstätten”.
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- author
- Pettersson, Johan LU ; Ahlberg, Per LU ; Lindskog, Anders LU ; Lindgren, Johan LU and Eriksson, Mats E. LU
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- algal-Lagerstätte, Bjärsjölagård Limestone, Dasycladalean algae, Klinta Formation, Lau Event
- in
- GFF
- volume
- 142
- issue
- 4
- pages
- 5 pages
- publisher
- Taylor & Francis
- external identifiers
-
- scopus:85091306684
- ISSN
- 1103-5897
- DOI
- 10.1080/11035897.2020.1819408
- language
- English
- LU publication?
- yes
- id
- 472bfb42-2488-4acc-8361-ced9681af3a7
- date added to LUP
- 2020-10-28 13:38:44
- date last changed
- 2022-04-19 01:37:16
@article{472bfb42-2488-4acc-8361-ced9681af3a7,
abstract = {{<p>In 2006, a new species of non-calcified dasycladalean alga, Chaetocladus gracilis, from the upper Silurian of Skåne (Scania), southernmost Sweden, was erected. The original description was based on a single incomplete fossil recovered from the abandoned limestone quarry at Bjärsjölagård, a classic geologic locality in Scania. Here we present four additional and, importantly, more complete specimens from this same site and type stratum. This new material largely corroborates the general anatomical features of C. gracilis, but also adds some intricate details, most notably with regards to the external sheet-like phytoleim and organisation of the laterals. Elemental mapping confirmed an expected carbonaceous composition of the fossils, which are embedded in a calcareous mudstone. These additional fossils show that the originally described specimen was not a singular occurrence at this locality. Based on the state of preservation of our algal fossils, we note that the mudstone facies of the Ludlow Bjärsjölagård Limestone Member of the Klinta Formation (Öved-Ramsåsa Group), from which all C. gracilis have been recovered, share characteristics with deposits typically referred to as “algal-Lagerstätten”.</p>}},
author = {{Pettersson, Johan and Ahlberg, Per and Lindskog, Anders and Lindgren, Johan and Eriksson, Mats E.}},
issn = {{1103-5897}},
keywords = {{algal-Lagerstätte; Bjärsjölagård Limestone; Dasycladalean algae; Klinta Formation; Lau Event}},
language = {{eng}},
number = {{4}},
pages = {{304--308}},
publisher = {{Taylor & Francis}},
series = {{GFF}},
title = {{The fossil alga Chaetocladus gracilis revisited : new material from the Silurian of Sweden}},
url = {{http://dx.doi.org/10.1080/11035897.2020.1819408}},
doi = {{10.1080/11035897.2020.1819408}},
volume = {{142}},
year = {{2020}},
}