Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula
To date, Cretaceous nautilids from the Antarctic Peninsula have received little attention and only a single species had been reported, Eutrephoceras simile Spath, from Seymour, Snow Hill, and James Ross islands. Currently, it is considered a synonym of Eutrephoceras subplicatum (Steinmann), which ha...
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Online Access: | http://dx.doi.org/10.1017/s0954102005002671 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002671 |
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crcambridgeupr:10.1017/s0954102005002671 2024-03-03T08:38:45+00:00 Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula CICHOWOLSKI, MARCELA AMBROSIO, ALFREDO CONCHEYRO, ANDREA 2005 http://dx.doi.org/10.1017/s0954102005002671 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002671 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 17, issue 2, page 267-280 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2005 crcambridgeupr https://doi.org/10.1017/s0954102005002671 2024-02-08T08:43:45Z To date, Cretaceous nautilids from the Antarctic Peninsula have received little attention and only a single species had been reported, Eutrephoceras simile Spath, from Seymour, Snow Hill, and James Ross islands. Currently, it is considered a synonym of Eutrephoceras subplicatum (Steinmann), which has also been described from the Upper Cretaceous of central Chile, southern Argentina and Angola. Here, we report and describe E. subplicatum in detail, based on specimens from the Lower Campanian–Maastrichtian of Vega, Seymour and James Ross islands, presenting, for the first time, embryonic conch features related to the palaeoecology of these organisms. The nauta of this species had a diameter of approximately 30 mm with 5–6 septa. In addition, we describe a new species, Eutrephoceras antarcticum , and one specimen assigned to the same genus in open nomenclature, both recovered from the Lower Campanian beds of James Ross Island. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctic Science James Ross Island Ross Island Cambridge University Press Antarctic The Antarctic Antarctic Peninsula Ross Island Argentina Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Snow Hill ENVELOPE(-57.183,-57.183,-64.466,-64.466) Antarctic Science 17 2 267 280 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography CICHOWOLSKI, MARCELA AMBROSIO, ALFREDO CONCHEYRO, ANDREA Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
To date, Cretaceous nautilids from the Antarctic Peninsula have received little attention and only a single species had been reported, Eutrephoceras simile Spath, from Seymour, Snow Hill, and James Ross islands. Currently, it is considered a synonym of Eutrephoceras subplicatum (Steinmann), which has also been described from the Upper Cretaceous of central Chile, southern Argentina and Angola. Here, we report and describe E. subplicatum in detail, based on specimens from the Lower Campanian–Maastrichtian of Vega, Seymour and James Ross islands, presenting, for the first time, embryonic conch features related to the palaeoecology of these organisms. The nauta of this species had a diameter of approximately 30 mm with 5–6 septa. In addition, we describe a new species, Eutrephoceras antarcticum , and one specimen assigned to the same genus in open nomenclature, both recovered from the Lower Campanian beds of James Ross Island. |
format |
Article in Journal/Newspaper |
author |
CICHOWOLSKI, MARCELA AMBROSIO, ALFREDO CONCHEYRO, ANDREA |
author_facet |
CICHOWOLSKI, MARCELA AMBROSIO, ALFREDO CONCHEYRO, ANDREA |
author_sort |
CICHOWOLSKI, MARCELA |
title |
Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula |
title_short |
Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula |
title_full |
Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula |
title_fullStr |
Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula |
title_full_unstemmed |
Nautilids from the Upper Cretaceous of the James Ross Basin, Antarctic Peninsula |
title_sort |
nautilids from the upper cretaceous of the james ross basin, antarctic peninsula |
publisher |
Cambridge University Press (CUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1017/s0954102005002671 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002671 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-57.183,-57.183,-64.466,-64.466) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Ross Island Argentina Seymour Snow Hill |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Ross Island Argentina Seymour Snow Hill |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctic Science James Ross Island Ross Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctic Science James Ross Island Ross Island |
op_source |
Antarctic Science volume 17, issue 2, page 267-280 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102005002671 |
container_title |
Antarctic Science |
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17 |
container_issue |
2 |
container_start_page |
267 |
op_container_end_page |
280 |
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1792507197896261632 |