New early Cambrian sclerites of Lapworthella schodakensis from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization
The Cambrian Stage 4 upper Bastion Formation of Albert Heim Bjerge and CH Ostenfeld Nunatak, NE Greenland, yielded 34 excellently preserved sclerites of Lapworthella schodackensis among other small shelly fossils. Lapworthellids have been interpreted as members of the camenellans,a basal tommotiid g...
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Naturhistoriska riksmuseet, Enheten för paleobiologi
2017
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2467 https://doi.org/10.1017/S0016756816000698 |
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ftnrm:oai:DiVA.org:nrm-2467 2024-09-15T18:09:07+00:00 New early Cambrian sclerites of Lapworthella schodakensis from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization Devaere, Lea Skovsted, Christian 2017 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2467 https://doi.org/10.1017/S0016756816000698 eng eng Naturhistoriska riksmuseet, Enheten för paleobiologi Geological Magazine, 0016-7568, 2017, 154:5, s. 1061-1072 info:eu-repo/grantAgreement/EC/FP7/SYNTHESYSgrant SE-TAF-4164 orcid:0000-0001-7366-7680 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2467 doi:10.1017/S0016756816000698 info:eu-repo/semantics/openAccess Lapworthellid tommotiid sclerite Cambrian Laurentia Geology Geologi Article in journal info:eu-repo/semantics/article text 2017 ftnrm https://doi.org/10.1017/S0016756816000698 2024-07-05T03:00:55Z The Cambrian Stage 4 upper Bastion Formation of Albert Heim Bjerge and CH Ostenfeld Nunatak, NE Greenland, yielded 34 excellently preserved sclerites of Lapworthella schodackensis among other small shelly fossils. Lapworthellids have been interpreted as members of the camenellans,a basal tommotiid group. Little is known about this group although the morphological andultrastructural features of their sclerites allow a potential reconstruction of a lophophorate body plan.The exquisite material from Greenland provides significant new data for the revision of the species taxonomy, but also for the comprehension of the scleritome structure of lapworthellids and the modeof formation of their sclerites. Two morphotypes of L. schodackensis sclerites are identified: one with asimple apex, occurring in sinistral and dextral forms; and one bilaterally symmetrical sclerite with twoapices. All bear a similar ornamentation constructed of repeated growth sets consisting of a reticulate inter-rib groove with tubercles, a densely denticulate rib and a striated sub-rib area. The new data onthe ornamentation and observations of the laminar shell microstructure of L. schodackensis enable us to improve the reconstruction of growth in lapworthellids. Finally, the morphological features of the two types of sclerites provide new information for the reconstruction of the bilaterally symmetrical multi-component lapworthellid scleritome with evidence of the fusion of adjacent sclerites duringearly ontogeny. Ett grunt ursprung Article in Journal/Newspaper Greenland Swedish Museum of Natural History: Publications (DiVA) Geological Magazine 154 5 1061 1072 |
institution |
Open Polar |
collection |
Swedish Museum of Natural History: Publications (DiVA) |
op_collection_id |
ftnrm |
language |
English |
topic |
Lapworthellid tommotiid sclerite Cambrian Laurentia Geology Geologi |
spellingShingle |
Lapworthellid tommotiid sclerite Cambrian Laurentia Geology Geologi Devaere, Lea Skovsted, Christian New early Cambrian sclerites of Lapworthella schodakensis from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization |
topic_facet |
Lapworthellid tommotiid sclerite Cambrian Laurentia Geology Geologi |
description |
The Cambrian Stage 4 upper Bastion Formation of Albert Heim Bjerge and CH Ostenfeld Nunatak, NE Greenland, yielded 34 excellently preserved sclerites of Lapworthella schodackensis among other small shelly fossils. Lapworthellids have been interpreted as members of the camenellans,a basal tommotiid group. Little is known about this group although the morphological andultrastructural features of their sclerites allow a potential reconstruction of a lophophorate body plan.The exquisite material from Greenland provides significant new data for the revision of the species taxonomy, but also for the comprehension of the scleritome structure of lapworthellids and the modeof formation of their sclerites. Two morphotypes of L. schodackensis sclerites are identified: one with asimple apex, occurring in sinistral and dextral forms; and one bilaterally symmetrical sclerite with twoapices. All bear a similar ornamentation constructed of repeated growth sets consisting of a reticulate inter-rib groove with tubercles, a densely denticulate rib and a striated sub-rib area. The new data onthe ornamentation and observations of the laminar shell microstructure of L. schodackensis enable us to improve the reconstruction of growth in lapworthellids. Finally, the morphological features of the two types of sclerites provide new information for the reconstruction of the bilaterally symmetrical multi-component lapworthellid scleritome with evidence of the fusion of adjacent sclerites duringearly ontogeny. Ett grunt ursprung |
format |
Article in Journal/Newspaper |
author |
Devaere, Lea Skovsted, Christian |
author_facet |
Devaere, Lea Skovsted, Christian |
author_sort |
Devaere, Lea |
title |
New early Cambrian sclerites of Lapworthella schodakensis from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization |
title_short |
New early Cambrian sclerites of Lapworthella schodakensis from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization |
title_full |
New early Cambrian sclerites of Lapworthella schodakensis from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization |
title_fullStr |
New early Cambrian sclerites of Lapworthella schodakensis from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization |
title_full_unstemmed |
New early Cambrian sclerites of Lapworthella schodakensis from NE Greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization |
title_sort |
new early cambrian sclerites of lapworthella schodakensis from ne greenland: advancements in knowledge of lapworthellid taxonomy, sclerite growth and scleritome organization |
publisher |
Naturhistoriska riksmuseet, Enheten för paleobiologi |
publishDate |
2017 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2467 https://doi.org/10.1017/S0016756816000698 |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
Geological Magazine, 0016-7568, 2017, 154:5, s. 1061-1072 info:eu-repo/grantAgreement/EC/FP7/SYNTHESYSgrant SE-TAF-4164 orcid:0000-0001-7366-7680 http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2467 doi:10.1017/S0016756816000698 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1017/S0016756816000698 |
container_title |
Geological Magazine |
container_volume |
154 |
container_issue |
5 |
container_start_page |
1061 |
op_container_end_page |
1072 |
_version_ |
1810446529504215040 |