Phosphatised olenid trilobites and associated fauna from the Upper Cambrian of Vastergotland, Sweden
(2005) In Acta Palaeontologica Polonica 50(3). p.429-440- Abstract
- Secondarily phosphatised olenid trilobites from organic-rich limestones (orsten) in the Furongian (Upper Cambrian) of Vastergotland, south-central Sweden, are described and illustrated. All trilobites originate from the Peltura scarabaeoides Zone and were collected on the western slope of Kinnekulle. Only the dorsal exoskeletons have become secondarily phosphatised, and the ventral appendages are not preserved. Yet the material is otherwise remarkably well preserved and reveals the morphology of the olenid trilobites in greater detail than hitherto known. Species belonging to the genera Ctenopyge, Sphaerophthalmus, Parabolina, and Peltura are identified, and several juvenile specimens are present in the material. The material is... (More)
- Secondarily phosphatised olenid trilobites from organic-rich limestones (orsten) in the Furongian (Upper Cambrian) of Vastergotland, south-central Sweden, are described and illustrated. All trilobites originate from the Peltura scarabaeoides Zone and were collected on the western slope of Kinnekulle. Only the dorsal exoskeletons have become secondarily phosphatised, and the ventral appendages are not preserved. Yet the material is otherwise remarkably well preserved and reveals the morphology of the olenid trilobites in greater detail than hitherto known. Species belonging to the genera Ctenopyge, Sphaerophthalmus, Parabolina, and Peltura are identified, and several juvenile specimens are present in the material. The material is disarticulated and fragmentary, and it has only been possible to identify a few specimens to species level. In addition to chaetognaths and conodonts, the trilobites are associated with pelmatozoan columnals, a possible camaroid, and fossils of uncertain affinities. These fossils, along with a probable conulariid fragment from the Peltura minor Zone, are also described and discussed. The presence of a benthic fauna of pelmatozoans, and possible conulariids and camaroids, indicates that at least parts of the Peltura zones were deposited during dysoxic rather than anoxic periods. Moreover, the sea floor must have been firm enough to allow colonisation by sessile organisms. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/222407
- author
- Ahlberg, Per LU ; Szaniawski, H ; Clarkson, ENK and Bengtson, S
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- trilobita, olenidae, problematica, phosphatisation, Cambrian, Shales, Alum, Sweden, Vastergotland
- in
- Acta Palaeontologica Polonica
- volume
- 50
- issue
- 3
- pages
- 429 - 440
- publisher
- Instytut Paleobiologii PAN
- external identifiers
-
- wos:000232242100002
- scopus:26244433881
- ISSN
- 0567-7920
- language
- English
- LU publication?
- yes
- id
- 885fa492-ceca-44ab-bdfb-917021010592 (old id 222407)
- alternative location
- http://app.pan.pl/acta50/app50-429.pdf
- date added to LUP
- 2016-04-01 16:39:43
- date last changed
- 2022-01-28 21:12:20
@article{885fa492-ceca-44ab-bdfb-917021010592,
abstract = {{Secondarily phosphatised olenid trilobites from organic-rich limestones (orsten) in the Furongian (Upper Cambrian) of Vastergotland, south-central Sweden, are described and illustrated. All trilobites originate from the Peltura scarabaeoides Zone and were collected on the western slope of Kinnekulle. Only the dorsal exoskeletons have become secondarily phosphatised, and the ventral appendages are not preserved. Yet the material is otherwise remarkably well preserved and reveals the morphology of the olenid trilobites in greater detail than hitherto known. Species belonging to the genera Ctenopyge, Sphaerophthalmus, Parabolina, and Peltura are identified, and several juvenile specimens are present in the material. The material is disarticulated and fragmentary, and it has only been possible to identify a few specimens to species level. In addition to chaetognaths and conodonts, the trilobites are associated with pelmatozoan columnals, a possible camaroid, and fossils of uncertain affinities. These fossils, along with a probable conulariid fragment from the Peltura minor Zone, are also described and discussed. The presence of a benthic fauna of pelmatozoans, and possible conulariids and camaroids, indicates that at least parts of the Peltura zones were deposited during dysoxic rather than anoxic periods. Moreover, the sea floor must have been firm enough to allow colonisation by sessile organisms.}},
author = {{Ahlberg, Per and Szaniawski, H and Clarkson, ENK and Bengtson, S}},
issn = {{0567-7920}},
keywords = {{trilobita; olenidae; problematica; phosphatisation; Cambrian; Shales; Alum; Sweden; Vastergotland}},
language = {{eng}},
number = {{3}},
pages = {{429--440}},
publisher = {{Instytut Paleobiologii PAN}},
series = {{Acta Palaeontologica Polonica}},
title = {{Phosphatised olenid trilobites and associated fauna from the Upper Cambrian of Vastergotland, Sweden}},
url = {{http://app.pan.pl/acta50/app50-429.pdf}},
volume = {{50}},
year = {{2005}},
}