Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes
Molgolaimus is a genus of free-living marine nematodes which is found in high densities (10–35% of the total community) up to 2000 m depth. Its occurrence is often associated with organically enriched and recently disturbed areas. Currently, only 16 species have been described, mainly from shallow w...
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crcambridgeupr:10.1017/s0954102006000034 2024-09-30T14:27:17+00:00 Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes Fonseca, Gustavo Vanreusel, Ann Decraemer, Wilfrieda 2006 http://dx.doi.org/10.1017/s0954102006000034 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000034 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 18, issue 1, page 23-50 ISSN 0954-1020 1365-2079 journal-article 2006 crcambridgeupr https://doi.org/10.1017/s0954102006000034 2024-09-18T04:04:00Z Molgolaimus is a genus of free-living marine nematodes which is found in high densities (10–35% of the total community) up to 2000 m depth. Its occurrence is often associated with organically enriched and recently disturbed areas. Currently, only 16 species have been described, mainly from shallow waters. The present study contributes 17 new species mainly from the Weddell Sea but also from the Pacific Ocean, and provides an illustrated polytomous identification key to species level. The 33 Molgolaimus species described can be identified based on just a few morphometric features: spicule length, body length, anal body diameter, tail length and pharynx length. A first insight into the biogeography of this deep sea genus at species level is presented. A comparison of morphometric characteristics between species suggests that the most similar species co-occur in the same geographical region, rather than within the same bathymetric zones or similar ecosystems separated over long distances. These observations suggest that deep sea nematodes may not have a common origin but might have derived “recently” from shallow water taxa. Therefore, global distribution of nematodes could be explained by means of palaeogeographical events. Article in Journal/Newspaper Antarctic Science Weddell Sea Cambridge University Press Pacific Weddell Weddell Sea Antarctic Science 18 1 23 50 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Molgolaimus is a genus of free-living marine nematodes which is found in high densities (10–35% of the total community) up to 2000 m depth. Its occurrence is often associated with organically enriched and recently disturbed areas. Currently, only 16 species have been described, mainly from shallow waters. The present study contributes 17 new species mainly from the Weddell Sea but also from the Pacific Ocean, and provides an illustrated polytomous identification key to species level. The 33 Molgolaimus species described can be identified based on just a few morphometric features: spicule length, body length, anal body diameter, tail length and pharynx length. A first insight into the biogeography of this deep sea genus at species level is presented. A comparison of morphometric characteristics between species suggests that the most similar species co-occur in the same geographical region, rather than within the same bathymetric zones or similar ecosystems separated over long distances. These observations suggest that deep sea nematodes may not have a common origin but might have derived “recently” from shallow water taxa. Therefore, global distribution of nematodes could be explained by means of palaeogeographical events. |
format |
Article in Journal/Newspaper |
author |
Fonseca, Gustavo Vanreusel, Ann Decraemer, Wilfrieda |
spellingShingle |
Fonseca, Gustavo Vanreusel, Ann Decraemer, Wilfrieda Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes |
author_facet |
Fonseca, Gustavo Vanreusel, Ann Decraemer, Wilfrieda |
author_sort |
Fonseca, Gustavo |
title |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes |
title_short |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes |
title_full |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes |
title_fullStr |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes |
title_full_unstemmed |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes |
title_sort |
taxonomy and biogeography of molgolaimus ditlevsen, 1921 (nematoda: chromadoria) with reference to the origins of deep sea nematodes |
publisher |
Cambridge University Press (CUP) |
publishDate |
2006 |
url |
http://dx.doi.org/10.1017/s0954102006000034 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102006000034 |
geographic |
Pacific Weddell Weddell Sea |
geographic_facet |
Pacific Weddell Weddell Sea |
genre |
Antarctic Science Weddell Sea |
genre_facet |
Antarctic Science Weddell Sea |
op_source |
Antarctic Science volume 18, issue 1, page 23-50 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102006000034 |
container_title |
Antarctic Science |
container_volume |
18 |
container_issue |
1 |
container_start_page |
23 |
op_container_end_page |
50 |
_version_ |
1811633425125212160 |