New species of Camptochlamys and Chlamys (Mollusca: Bivalvia: Pectinidae) from near the Cretaceous/Tertiary boundary at Ocean Point, North Slope, Alaska
Two new species of pectinid bivalves, Camptochlamys alaskensis and Chlamys aquilonia , are present in shallow-marine deposits near Ocean Point, northeastern Alaska, at about 70°N latitude. The precise age of these deposits is debatable, but paleontological and isotopic age estimates indicate placeme...
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Language: | English |
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Cambridge University Press (CUP)
1992
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Online Access: | http://dx.doi.org/10.1017/s0022336000033746 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000033746 |
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crcambridgeupr:10.1017/s0022336000033746 2024-03-03T08:42:01+00:00 New species of Camptochlamys and Chlamys (Mollusca: Bivalvia: Pectinidae) from near the Cretaceous/Tertiary boundary at Ocean Point, North Slope, Alaska Waller, Thomas R. Marincovich, Louie 1992 http://dx.doi.org/10.1017/s0022336000033746 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000033746 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of Paleontology volume 66, issue 2, page 215-227 ISSN 0022-3360 1937-2337 Paleontology journal-article 1992 crcambridgeupr https://doi.org/10.1017/s0022336000033746 2024-02-08T08:39:04Z Two new species of pectinid bivalves, Camptochlamys alaskensis and Chlamys aquilonia , are present in shallow-marine deposits near Ocean Point, northeastern Alaska, at about 70°N latitude. The precise age of these deposits is debatable, but paleontological and isotopic age estimates indicate placement near the Cretaceous–Tertiary boundary. The occurrence of Camptochlamys extends the chronostratigraphic and geographic range of this genus, previously unknown from any strata above the uppermost Jurassic (Tithonian) of Europe and unknown from any strata in North America. In contrast, the new Chlamys species represents an evolutionary advance beyond its nearest relative in the Maastrichtian of northern Europe and resembles Cenozoic members of its clade in certain features of shell microstructure. These new species are thus a microcosm of the debate regarding the age of these deposits and strengthen the hypothesis that the Ocean Point fauna lived in an Arctic Ocean basin that was isolated from the world ocean. Article in Journal/Newspaper Arctic Arctic Ocean north slope Alaska Cambridge University Press Arctic Arctic Ocean Journal of Paleontology 66 2 215 227 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology |
spellingShingle |
Paleontology Waller, Thomas R. Marincovich, Louie New species of Camptochlamys and Chlamys (Mollusca: Bivalvia: Pectinidae) from near the Cretaceous/Tertiary boundary at Ocean Point, North Slope, Alaska |
topic_facet |
Paleontology |
description |
Two new species of pectinid bivalves, Camptochlamys alaskensis and Chlamys aquilonia , are present in shallow-marine deposits near Ocean Point, northeastern Alaska, at about 70°N latitude. The precise age of these deposits is debatable, but paleontological and isotopic age estimates indicate placement near the Cretaceous–Tertiary boundary. The occurrence of Camptochlamys extends the chronostratigraphic and geographic range of this genus, previously unknown from any strata above the uppermost Jurassic (Tithonian) of Europe and unknown from any strata in North America. In contrast, the new Chlamys species represents an evolutionary advance beyond its nearest relative in the Maastrichtian of northern Europe and resembles Cenozoic members of its clade in certain features of shell microstructure. These new species are thus a microcosm of the debate regarding the age of these deposits and strengthen the hypothesis that the Ocean Point fauna lived in an Arctic Ocean basin that was isolated from the world ocean. |
format |
Article in Journal/Newspaper |
author |
Waller, Thomas R. Marincovich, Louie |
author_facet |
Waller, Thomas R. Marincovich, Louie |
author_sort |
Waller, Thomas R. |
title |
New species of Camptochlamys and Chlamys (Mollusca: Bivalvia: Pectinidae) from near the Cretaceous/Tertiary boundary at Ocean Point, North Slope, Alaska |
title_short |
New species of Camptochlamys and Chlamys (Mollusca: Bivalvia: Pectinidae) from near the Cretaceous/Tertiary boundary at Ocean Point, North Slope, Alaska |
title_full |
New species of Camptochlamys and Chlamys (Mollusca: Bivalvia: Pectinidae) from near the Cretaceous/Tertiary boundary at Ocean Point, North Slope, Alaska |
title_fullStr |
New species of Camptochlamys and Chlamys (Mollusca: Bivalvia: Pectinidae) from near the Cretaceous/Tertiary boundary at Ocean Point, North Slope, Alaska |
title_full_unstemmed |
New species of Camptochlamys and Chlamys (Mollusca: Bivalvia: Pectinidae) from near the Cretaceous/Tertiary boundary at Ocean Point, North Slope, Alaska |
title_sort |
new species of camptochlamys and chlamys (mollusca: bivalvia: pectinidae) from near the cretaceous/tertiary boundary at ocean point, north slope, alaska |
publisher |
Cambridge University Press (CUP) |
publishDate |
1992 |
url |
http://dx.doi.org/10.1017/s0022336000033746 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336000033746 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean north slope Alaska |
genre_facet |
Arctic Arctic Ocean north slope Alaska |
op_source |
Journal of Paleontology volume 66, issue 2, page 215-227 ISSN 0022-3360 1937-2337 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0022336000033746 |
container_title |
Journal of Paleontology |
container_volume |
66 |
container_issue |
2 |
container_start_page |
215 |
op_container_end_page |
227 |
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1792497535535808512 |