Possible causes of amphi-Atlantic distribution of Orchestia gammarellus (Pallas, 1776) (Crustacea, Amphipoda, Talitridae) in the North Atlantic: a review
Hypotheses concerning the modern distribution of Orchestia gammarellus (Crustacea, Amphipoda, Talitridae) and its causes in the North Atlantic are discussed. The synanthropic dispersal hypothesis of Henzler and Ingólfsson (2008) considers O. gammarellus as originating on the eastern shore of the Nor...
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2023
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ftzenodo:oai:zenodo.org:7524458 2024-09-15T18:13:35+00:00 Possible causes of amphi-Atlantic distribution of Orchestia gammarellus (Pallas, 1776) (Crustacea, Amphipoda, Talitridae) in the North Atlantic: a review Wildish, David J. McDonald, John H. 2023-01-09 https://doi.org/10.3897/zse.99.95980 unknown Pensoft Publishers https://doi.org/10.3897/zse.99.95980.figure1 https://zenodo.org/communities/biosyslit https://doi.org/10.3897/zse.99.95980 oai:zenodo.org:7524458 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Zoosystematics and Evolution, 99((1)), 55-62, (2023-01-09) Biota Animalia Arthropoda Malacostraca Amphipoda Senticaudata Talitrida Talitridira Talitroidea Talitroidae Talitridae Talitrinae Orchestia Orchestia gammarellus evolution dispersal North Atlantic O. gammarellus zoogeography info:eu-repo/semantics/article 2023 ftzenodo https://doi.org/10.3897/zse.99.9598010.3897/zse.99.95980.figure1 2024-07-26T17:39:34Z Hypotheses concerning the modern distribution of Orchestia gammarellus (Crustacea, Amphipoda, Talitridae) and its causes in the North Atlantic are discussed. The synanthropic dispersal hypothesis of Henzler and Ingólfsson (2008) considers O. gammarellus as originating on the eastern shore of the North Atlantic and being transported by humans to Iceland and the western Atlantic shore (Newfoundland and the Maritime Provinces of Canada). The Eocene and natural dispersal hypothesis of Myers and Lowry (2020) proposes a geologically earlier origin of O. gammarellus when the west and east shores of the North Atlantic were still connected. Present day amphi-Atlantic distribution was explained by vicariance, with the vicariant event causing separation of O. gammarellus being continental drift drawing apart the west and east shores of the North Atlantic. A post-glacial natural dispersal hypothesis proposed herein, involves transport on ice floes or in driftwood from European shores to Iceland and the Atlantic Provinces of Canada. The small genetic distances amongst populations found by Henzler and Ingólfsson (2008) at the COI gene are inconsistent with the Eocene vicariance hypothesis. On evolutionary grounds, we question Myers and Lowry's (2020) designation of the Icelandic and Canadian populations as a new species of Orchestia. Existing molecular and morphological data are insufficient to distinguish between human-aided dispersal and natural rafting. Article in Journal/Newspaper Iceland Newfoundland North Atlantic Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Biota Animalia Arthropoda Malacostraca Amphipoda Senticaudata Talitrida Talitridira Talitroidea Talitroidae Talitridae Talitrinae Orchestia Orchestia gammarellus evolution dispersal North Atlantic O. gammarellus zoogeography |
spellingShingle |
Biota Animalia Arthropoda Malacostraca Amphipoda Senticaudata Talitrida Talitridira Talitroidea Talitroidae Talitridae Talitrinae Orchestia Orchestia gammarellus evolution dispersal North Atlantic O. gammarellus zoogeography Wildish, David J. McDonald, John H. Possible causes of amphi-Atlantic distribution of Orchestia gammarellus (Pallas, 1776) (Crustacea, Amphipoda, Talitridae) in the North Atlantic: a review |
topic_facet |
Biota Animalia Arthropoda Malacostraca Amphipoda Senticaudata Talitrida Talitridira Talitroidea Talitroidae Talitridae Talitrinae Orchestia Orchestia gammarellus evolution dispersal North Atlantic O. gammarellus zoogeography |
description |
Hypotheses concerning the modern distribution of Orchestia gammarellus (Crustacea, Amphipoda, Talitridae) and its causes in the North Atlantic are discussed. The synanthropic dispersal hypothesis of Henzler and Ingólfsson (2008) considers O. gammarellus as originating on the eastern shore of the North Atlantic and being transported by humans to Iceland and the western Atlantic shore (Newfoundland and the Maritime Provinces of Canada). The Eocene and natural dispersal hypothesis of Myers and Lowry (2020) proposes a geologically earlier origin of O. gammarellus when the west and east shores of the North Atlantic were still connected. Present day amphi-Atlantic distribution was explained by vicariance, with the vicariant event causing separation of O. gammarellus being continental drift drawing apart the west and east shores of the North Atlantic. A post-glacial natural dispersal hypothesis proposed herein, involves transport on ice floes or in driftwood from European shores to Iceland and the Atlantic Provinces of Canada. The small genetic distances amongst populations found by Henzler and Ingólfsson (2008) at the COI gene are inconsistent with the Eocene vicariance hypothesis. On evolutionary grounds, we question Myers and Lowry's (2020) designation of the Icelandic and Canadian populations as a new species of Orchestia. Existing molecular and morphological data are insufficient to distinguish between human-aided dispersal and natural rafting. |
format |
Article in Journal/Newspaper |
author |
Wildish, David J. McDonald, John H. |
author_facet |
Wildish, David J. McDonald, John H. |
author_sort |
Wildish, David J. |
title |
Possible causes of amphi-Atlantic distribution of Orchestia gammarellus (Pallas, 1776) (Crustacea, Amphipoda, Talitridae) in the North Atlantic: a review |
title_short |
Possible causes of amphi-Atlantic distribution of Orchestia gammarellus (Pallas, 1776) (Crustacea, Amphipoda, Talitridae) in the North Atlantic: a review |
title_full |
Possible causes of amphi-Atlantic distribution of Orchestia gammarellus (Pallas, 1776) (Crustacea, Amphipoda, Talitridae) in the North Atlantic: a review |
title_fullStr |
Possible causes of amphi-Atlantic distribution of Orchestia gammarellus (Pallas, 1776) (Crustacea, Amphipoda, Talitridae) in the North Atlantic: a review |
title_full_unstemmed |
Possible causes of amphi-Atlantic distribution of Orchestia gammarellus (Pallas, 1776) (Crustacea, Amphipoda, Talitridae) in the North Atlantic: a review |
title_sort |
possible causes of amphi-atlantic distribution of orchestia gammarellus (pallas, 1776) (crustacea, amphipoda, talitridae) in the north atlantic: a review |
publisher |
Pensoft Publishers |
publishDate |
2023 |
url |
https://doi.org/10.3897/zse.99.95980 |
genre |
Iceland Newfoundland North Atlantic |
genre_facet |
Iceland Newfoundland North Atlantic |
op_source |
Zoosystematics and Evolution, 99((1)), 55-62, (2023-01-09) |
op_relation |
https://doi.org/10.3897/zse.99.95980.figure1 https://zenodo.org/communities/biosyslit https://doi.org/10.3897/zse.99.95980 oai:zenodo.org:7524458 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.3897/zse.99.9598010.3897/zse.99.95980.figure1 |
_version_ |
1810451342953545728 |