Uncompressed specimens of Monograptus turriculatus (Barrande, 1850) from Cornwallis Island, Arctic Canada
Isolated specimens of Monograptus turriculatus (Barrande, 1850) have been recovered from calcite concretions of the turriculatus Zone (late Llandovery) from the Cape Phillips Formation, Canadian Arctic Islands. The sicula shows ventral as well as dextral lateral curvature, and the thecae show a pron...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1986
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e86-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/e86-057 |
id |
crcansciencepubl:10.1139/e86-057 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e86-057 2023-12-17T10:24:54+01:00 Uncompressed specimens of Monograptus turriculatus (Barrande, 1850) from Cornwallis Island, Arctic Canada Melchin, M. J. Lenz, A. C. 1986 http://dx.doi.org/10.1139/e86-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/e86-057 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 23, issue 4, page 579-582 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1986 crcansciencepubl https://doi.org/10.1139/e86-057 2023-11-19T13:39:30Z Isolated specimens of Monograptus turriculatus (Barrande, 1850) have been recovered from calcite concretions of the turriculatus Zone (late Llandovery) from the Cape Phillips Formation, Canadian Arctic Islands. The sicula shows ventral as well as dextral lateral curvature, and the thecae show a pronounced lateral asymmetry. This asymmetry is manifest as a tear-shaped aperture, a long, laterally directed spine on the outer apertural margin, and a shorter, ventrally directed spine on the inner apertural margin. The latter spine is totally absent on the proximal thecae.Monograptus sedgwickii (Portlock, 1853) is suggested as a possible ancestor to M. turriculatus. Article in Journal/Newspaper Arctic Cornwallis Island Canadian Science Publishing (via Crossref) Arctic Canada Cornwallis ENVELOPE(-54.464,-54.464,-61.072,-61.072) Cape Phillips ENVELOPE(-62.600,-62.600,-84.750,-84.750) Cornwallis Island ENVELOPE(-95.001,-95.001,75.135,75.135) Canadian Journal of Earth Sciences 23 4 579 582 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Melchin, M. J. Lenz, A. C. Uncompressed specimens of Monograptus turriculatus (Barrande, 1850) from Cornwallis Island, Arctic Canada |
topic_facet |
General Earth and Planetary Sciences |
description |
Isolated specimens of Monograptus turriculatus (Barrande, 1850) have been recovered from calcite concretions of the turriculatus Zone (late Llandovery) from the Cape Phillips Formation, Canadian Arctic Islands. The sicula shows ventral as well as dextral lateral curvature, and the thecae show a pronounced lateral asymmetry. This asymmetry is manifest as a tear-shaped aperture, a long, laterally directed spine on the outer apertural margin, and a shorter, ventrally directed spine on the inner apertural margin. The latter spine is totally absent on the proximal thecae.Monograptus sedgwickii (Portlock, 1853) is suggested as a possible ancestor to M. turriculatus. |
format |
Article in Journal/Newspaper |
author |
Melchin, M. J. Lenz, A. C. |
author_facet |
Melchin, M. J. Lenz, A. C. |
author_sort |
Melchin, M. J. |
title |
Uncompressed specimens of Monograptus turriculatus (Barrande, 1850) from Cornwallis Island, Arctic Canada |
title_short |
Uncompressed specimens of Monograptus turriculatus (Barrande, 1850) from Cornwallis Island, Arctic Canada |
title_full |
Uncompressed specimens of Monograptus turriculatus (Barrande, 1850) from Cornwallis Island, Arctic Canada |
title_fullStr |
Uncompressed specimens of Monograptus turriculatus (Barrande, 1850) from Cornwallis Island, Arctic Canada |
title_full_unstemmed |
Uncompressed specimens of Monograptus turriculatus (Barrande, 1850) from Cornwallis Island, Arctic Canada |
title_sort |
uncompressed specimens of monograptus turriculatus (barrande, 1850) from cornwallis island, arctic canada |
publisher |
Canadian Science Publishing |
publishDate |
1986 |
url |
http://dx.doi.org/10.1139/e86-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/e86-057 |
long_lat |
ENVELOPE(-54.464,-54.464,-61.072,-61.072) ENVELOPE(-62.600,-62.600,-84.750,-84.750) ENVELOPE(-95.001,-95.001,75.135,75.135) |
geographic |
Arctic Canada Cornwallis Cape Phillips Cornwallis Island |
geographic_facet |
Arctic Canada Cornwallis Cape Phillips Cornwallis Island |
genre |
Arctic Cornwallis Island |
genre_facet |
Arctic Cornwallis Island |
op_source |
Canadian Journal of Earth Sciences volume 23, issue 4, page 579-582 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e86-057 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
23 |
container_issue |
4 |
container_start_page |
579 |
op_container_end_page |
582 |
_version_ |
1785571307113414656 |