Ontogeny of Parabolinella panosa (Olenidae, Trilobita) from the uppermost Furongian (Upper Cambrian) of northwestern Canada, with discussion of olenid protaspides
The ontogeny of Parabolinella panosa (the Family Olenidae) from the uppermost Furongian (Upper Cambrian) of the Rabbitkettle Formation, MacKenzie Mountains, northwestern Canada, is described. The protaspides are characterized by a highly convex lateral profile, parallel-sided axial furrows, and thre...
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crcansciencepubl:10.1139/e07-032 2023-12-17T10:33:15+01:00 Ontogeny of Parabolinella panosa (Olenidae, Trilobita) from the uppermost Furongian (Upper Cambrian) of northwestern Canada, with discussion of olenid protaspides Lee, Dong-Chan Chatterton, Brian D.E. 2007 http://dx.doi.org/10.1139/e07-032 http://www.nrcresearchpress.com/doi/pdf/10.1139/e07-032 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 44, issue 12, page 1695-1711 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2007 crcansciencepubl https://doi.org/10.1139/e07-032 2023-11-19T13:38:32Z The ontogeny of Parabolinella panosa (the Family Olenidae) from the uppermost Furongian (Upper Cambrian) of the Rabbitkettle Formation, MacKenzie Mountains, northwestern Canada, is described. The protaspides are characterized by a highly convex lateral profile, parallel-sided axial furrows, and three pairs of fixigenal spines. Protaspid morphologies of eight olenid species, including P. panosa, demonstrate that the Olenidae, a widely accepted monophyletic group, displays surprisingly disparate morphologies during the protaspid period. The olenid protaspides show morphologic differences according to oxygenation conditions; the olenid protaspides from poorly oxygenated environments are smaller in size, and have a spindle-shaped axis, distinct anterior pits, and a smaller protopygidium, but lack anterior and mid-fixigenal spine pairs, while the other protaspides which lived in better oxygenated condition are larger, have three pairs of fixigenal spines and a larger protopygidium, and lack distinct anterior pits. Olenimorph form is retained by most, if not all, olenid holaspides, even by those which inhabited better oxygenated conditions, suggesting greater morphological plasticity in the protaspid period. Article in Journal/Newspaper Mackenzie mountains Canadian Science Publishing (via Crossref) Canada Canadian Journal of Earth Sciences 44 12 1695 1711 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Lee, Dong-Chan Chatterton, Brian D.E. Ontogeny of Parabolinella panosa (Olenidae, Trilobita) from the uppermost Furongian (Upper Cambrian) of northwestern Canada, with discussion of olenid protaspides |
topic_facet |
General Earth and Planetary Sciences |
description |
The ontogeny of Parabolinella panosa (the Family Olenidae) from the uppermost Furongian (Upper Cambrian) of the Rabbitkettle Formation, MacKenzie Mountains, northwestern Canada, is described. The protaspides are characterized by a highly convex lateral profile, parallel-sided axial furrows, and three pairs of fixigenal spines. Protaspid morphologies of eight olenid species, including P. panosa, demonstrate that the Olenidae, a widely accepted monophyletic group, displays surprisingly disparate morphologies during the protaspid period. The olenid protaspides show morphologic differences according to oxygenation conditions; the olenid protaspides from poorly oxygenated environments are smaller in size, and have a spindle-shaped axis, distinct anterior pits, and a smaller protopygidium, but lack anterior and mid-fixigenal spine pairs, while the other protaspides which lived in better oxygenated condition are larger, have three pairs of fixigenal spines and a larger protopygidium, and lack distinct anterior pits. Olenimorph form is retained by most, if not all, olenid holaspides, even by those which inhabited better oxygenated conditions, suggesting greater morphological plasticity in the protaspid period. |
format |
Article in Journal/Newspaper |
author |
Lee, Dong-Chan Chatterton, Brian D.E. |
author_facet |
Lee, Dong-Chan Chatterton, Brian D.E. |
author_sort |
Lee, Dong-Chan |
title |
Ontogeny of Parabolinella panosa (Olenidae, Trilobita) from the uppermost Furongian (Upper Cambrian) of northwestern Canada, with discussion of olenid protaspides |
title_short |
Ontogeny of Parabolinella panosa (Olenidae, Trilobita) from the uppermost Furongian (Upper Cambrian) of northwestern Canada, with discussion of olenid protaspides |
title_full |
Ontogeny of Parabolinella panosa (Olenidae, Trilobita) from the uppermost Furongian (Upper Cambrian) of northwestern Canada, with discussion of olenid protaspides |
title_fullStr |
Ontogeny of Parabolinella panosa (Olenidae, Trilobita) from the uppermost Furongian (Upper Cambrian) of northwestern Canada, with discussion of olenid protaspides |
title_full_unstemmed |
Ontogeny of Parabolinella panosa (Olenidae, Trilobita) from the uppermost Furongian (Upper Cambrian) of northwestern Canada, with discussion of olenid protaspides |
title_sort |
ontogeny of parabolinella panosa (olenidae, trilobita) from the uppermost furongian (upper cambrian) of northwestern canada, with discussion of olenid protaspides |
publisher |
Canadian Science Publishing |
publishDate |
2007 |
url |
http://dx.doi.org/10.1139/e07-032 http://www.nrcresearchpress.com/doi/pdf/10.1139/e07-032 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Mackenzie mountains |
genre_facet |
Mackenzie mountains |
op_source |
Canadian Journal of Earth Sciences volume 44, issue 12, page 1695-1711 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e07-032 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
44 |
container_issue |
12 |
container_start_page |
1695 |
op_container_end_page |
1711 |
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1785587182524694528 |