A late Coniacian ceratioid dinoflagellate cyst, Odontochitina octopus sp.nov., from the Kanguk Formation, Canadian Arctic
Anew species of dinoflagellate cyst, Odontochitina octopus sp.nov., is described from the Upper Cretaceous Kanguk Formation of the Sverdrup Basin, Canadian Arctic Islands. The features that support the proposal of this new species also necessitate the emendation of the genus. Odontochitina octopus i...
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1998
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Online Access: | http://dx.doi.org/10.1139/e98-044 http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-044 |
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crcansciencepubl:10.1139/e98-044 2024-05-12T07:59:39+00:00 A late Coniacian ceratioid dinoflagellate cyst, Odontochitina octopus sp.nov., from the Kanguk Formation, Canadian Arctic Núñez-Betelu, K Hills, L V 1998 http://dx.doi.org/10.1139/e98-044 http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-044 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 35, issue 8, page 923-930 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1998 crcansciencepubl https://doi.org/10.1139/e98-044 2024-04-18T06:54:52Z Anew species of dinoflagellate cyst, Odontochitina octopus sp.nov., is described from the Upper Cretaceous Kanguk Formation of the Sverdrup Basin, Canadian Arctic Islands. The features that support the proposal of this new species also necessitate the emendation of the genus. Odontochitina octopus is a large, cornucavate, and ceratioid cyst with four finger-like terminations on the apical horns and two terminations on both the postcingular and antapical horns. These finger-like terminations are unique to this new species and are formed by the detachment of the paraplates at mid-length of each horn. All other features of O. octopus conform with the previous description of the genus. In the Family Ceratiaceae four plates form the apical horn, whereas two plates are involved in both the postcingular and antapical horns. In O. octopus the mid-length detachment of the horn-forming paraplates seems to have developed the finger-like terminations. Since the nature and amount of pores and perforations in other species of Odontochitina are variable and possibly linked to changes in the environment, the presence of the multiple-fingered O. octopus in a single widespread horizon might also be indicative of short-lived unusual environmental conditions. At this horizon, which has been dated as late Coniacian by the ammonite Scaphites depressus Reeside, the palynomorph assemblage is highly dominated by marine species. Article in Journal/Newspaper Arctic sverdrup basin Canadian Science Publishing Arctic Canadian Journal of Earth Sciences 35 8 923 930 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Núñez-Betelu, K Hills, L V A late Coniacian ceratioid dinoflagellate cyst, Odontochitina octopus sp.nov., from the Kanguk Formation, Canadian Arctic |
topic_facet |
General Earth and Planetary Sciences |
description |
Anew species of dinoflagellate cyst, Odontochitina octopus sp.nov., is described from the Upper Cretaceous Kanguk Formation of the Sverdrup Basin, Canadian Arctic Islands. The features that support the proposal of this new species also necessitate the emendation of the genus. Odontochitina octopus is a large, cornucavate, and ceratioid cyst with four finger-like terminations on the apical horns and two terminations on both the postcingular and antapical horns. These finger-like terminations are unique to this new species and are formed by the detachment of the paraplates at mid-length of each horn. All other features of O. octopus conform with the previous description of the genus. In the Family Ceratiaceae four plates form the apical horn, whereas two plates are involved in both the postcingular and antapical horns. In O. octopus the mid-length detachment of the horn-forming paraplates seems to have developed the finger-like terminations. Since the nature and amount of pores and perforations in other species of Odontochitina are variable and possibly linked to changes in the environment, the presence of the multiple-fingered O. octopus in a single widespread horizon might also be indicative of short-lived unusual environmental conditions. At this horizon, which has been dated as late Coniacian by the ammonite Scaphites depressus Reeside, the palynomorph assemblage is highly dominated by marine species. |
format |
Article in Journal/Newspaper |
author |
Núñez-Betelu, K Hills, L V |
author_facet |
Núñez-Betelu, K Hills, L V |
author_sort |
Núñez-Betelu, K |
title |
A late Coniacian ceratioid dinoflagellate cyst, Odontochitina octopus sp.nov., from the Kanguk Formation, Canadian Arctic |
title_short |
A late Coniacian ceratioid dinoflagellate cyst, Odontochitina octopus sp.nov., from the Kanguk Formation, Canadian Arctic |
title_full |
A late Coniacian ceratioid dinoflagellate cyst, Odontochitina octopus sp.nov., from the Kanguk Formation, Canadian Arctic |
title_fullStr |
A late Coniacian ceratioid dinoflagellate cyst, Odontochitina octopus sp.nov., from the Kanguk Formation, Canadian Arctic |
title_full_unstemmed |
A late Coniacian ceratioid dinoflagellate cyst, Odontochitina octopus sp.nov., from the Kanguk Formation, Canadian Arctic |
title_sort |
late coniacian ceratioid dinoflagellate cyst, odontochitina octopus sp.nov., from the kanguk formation, canadian arctic |
publisher |
Canadian Science Publishing |
publishDate |
1998 |
url |
http://dx.doi.org/10.1139/e98-044 http://www.nrcresearchpress.com/doi/pdf/10.1139/e98-044 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic sverdrup basin |
genre_facet |
Arctic sverdrup basin |
op_source |
Canadian Journal of Earth Sciences volume 35, issue 8, page 923-930 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e98-044 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
35 |
container_issue |
8 |
container_start_page |
923 |
op_container_end_page |
930 |
_version_ |
1798841228384534528 |