Quaternary colonization or Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna
Seven endemic species of skates (Chondrichthyes: Rajidae) represent the only family of elasmobranchs currently known to live in Antarctic continental waters. Many previous authors believed skates colonized Antarctic waters from Patagonia during interglacial periods in the Quaternary. However, recent...
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Cambridge University Press (CUP)
1994
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Online Access: | http://dx.doi.org/10.1017/s0094837300012690 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300012690 |
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crcambridgeupr:10.1017/s0094837300012690 2024-06-23T07:45:51+00:00 Quaternary colonization or Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna Long, Douglas J. 1994 http://dx.doi.org/10.1017/s0094837300012690 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300012690 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Paleobiology volume 20, issue 2, page 215-228 ISSN 0094-8373 1938-5331 journal-article 1994 crcambridgeupr https://doi.org/10.1017/s0094837300012690 2024-06-12T04:04:17Z Seven endemic species of skates (Chondrichthyes: Rajidae) represent the only family of elasmobranchs currently known to live in Antarctic continental waters. Many previous authors believed skates colonized Antarctic waters from Patagonia during interglacial periods in the Quaternary. However, recent fossil material collected from the middle Eocene La Meseta Formation of Seymour Island, Antarctic Peninsula, indicates that they may have persisted in Antarctic waters since the Paleogene. Additionally, oceanographic barriers present in the Neogene and Quaternary would have prevented dispersal from southern continents to Antarctica. A revised dispersal scenario, based on skate fossils, biology, paleogeography, and present centers of skate diversity, suggests that skates evolved in the western Tethys and North Boreal seas of western Europe in the Late Cretaceous and early Paleogene and emigrated into Antarctica during the early to middle Eocene via a dispersal corridor along the continental margins of the western Atlantic Ocean. Skates probably populated the Pacific Basin by passing from this dispersal corridor through the Arctic Ocean. Vicariant events, such as opening of the Drake Passage, the development of the Circum-Antarctic Current, and formation of deep and wide basins around Antarctica in the late Paleogene, created barriers that isolated some species of skates in Antarctica and prevented movement of other species of skates into Antarctica from northern areas. Skates are the only group of fishes known to have survived the Oligocene cooling of Antarctica that killed or extirpated the Paleogene ichthyofauna; they persisted by a combination of cold-tolerance, generalized diet, and unspecialized bathymetric and habitat preferences. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Arctic Ocean Drake Passage Seymour Island Cambridge University Press Antarctic Antarctic Peninsula Arctic Arctic Ocean Drake Passage Pacific Patagonia Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) The Antarctic Paleobiology 20 2 215 228 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Seven endemic species of skates (Chondrichthyes: Rajidae) represent the only family of elasmobranchs currently known to live in Antarctic continental waters. Many previous authors believed skates colonized Antarctic waters from Patagonia during interglacial periods in the Quaternary. However, recent fossil material collected from the middle Eocene La Meseta Formation of Seymour Island, Antarctic Peninsula, indicates that they may have persisted in Antarctic waters since the Paleogene. Additionally, oceanographic barriers present in the Neogene and Quaternary would have prevented dispersal from southern continents to Antarctica. A revised dispersal scenario, based on skate fossils, biology, paleogeography, and present centers of skate diversity, suggests that skates evolved in the western Tethys and North Boreal seas of western Europe in the Late Cretaceous and early Paleogene and emigrated into Antarctica during the early to middle Eocene via a dispersal corridor along the continental margins of the western Atlantic Ocean. Skates probably populated the Pacific Basin by passing from this dispersal corridor through the Arctic Ocean. Vicariant events, such as opening of the Drake Passage, the development of the Circum-Antarctic Current, and formation of deep and wide basins around Antarctica in the late Paleogene, created barriers that isolated some species of skates in Antarctica and prevented movement of other species of skates into Antarctica from northern areas. Skates are the only group of fishes known to have survived the Oligocene cooling of Antarctica that killed or extirpated the Paleogene ichthyofauna; they persisted by a combination of cold-tolerance, generalized diet, and unspecialized bathymetric and habitat preferences. |
format |
Article in Journal/Newspaper |
author |
Long, Douglas J. |
spellingShingle |
Long, Douglas J. Quaternary colonization or Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna |
author_facet |
Long, Douglas J. |
author_sort |
Long, Douglas J. |
title |
Quaternary colonization or Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna |
title_short |
Quaternary colonization or Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna |
title_full |
Quaternary colonization or Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna |
title_fullStr |
Quaternary colonization or Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna |
title_full_unstemmed |
Quaternary colonization or Paleogene persistence?: historical biogeography of skates (Chondrichthyes: Rajidae) in the Antarctic ichthyofauna |
title_sort |
quaternary colonization or paleogene persistence?: historical biogeography of skates (chondrichthyes: rajidae) in the antarctic ichthyofauna |
publisher |
Cambridge University Press (CUP) |
publishDate |
1994 |
url |
http://dx.doi.org/10.1017/s0094837300012690 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300012690 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula Arctic Arctic Ocean Drake Passage Pacific Patagonia Seymour Seymour Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Arctic Arctic Ocean Drake Passage Pacific Patagonia Seymour Seymour Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Arctic Ocean Drake Passage Seymour Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Arctic Ocean Drake Passage Seymour Island |
op_source |
Paleobiology volume 20, issue 2, page 215-228 ISSN 0094-8373 1938-5331 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0094837300012690 |
container_title |
Paleobiology |
container_volume |
20 |
container_issue |
2 |
container_start_page |
215 |
op_container_end_page |
228 |
_version_ |
1802642647090724864 |