Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes
Molgolaimus is a genus of free-living marine nematodes which is found in high densities (1035% 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 wa...
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ftawi:oai:epic.awi.de:14936 2023-05-15T14:14:52+02:00 Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes Fonseca, Gustavo Vanreusel, A. Wilfrieda, D. 2006 https://epic.awi.de/id/eprint/14936/ https://doi.org/10.1017/S0950102006000034 https://hdl.handle.net/10013/epic.25143 unknown Fonseca, G. , Vanreusel, A. and Wilfrieda, D. (2006) Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes , Antarctic science, 18 (1), pp. 23-50 . doi:10.1017/S0950102006000034 <https://doi.org/10.1017/S0950102006000034> , hdl:10013/epic.25143 EPIC3Antarctic science, 18(1), pp. 23-50 Article isiRev 2006 ftawi https://doi.org/10.1017/S0950102006000034 2021-12-24T15:31:03Z Molgolaimus is a genus of free-living marine nematodes which is found in high densities (1035% 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Pacific Weddell Weddell Sea |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
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description |
Molgolaimus is a genus of free-living marine nematodes which is found in high densities (1035% 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, A. Wilfrieda, D. |
spellingShingle |
Fonseca, Gustavo Vanreusel, A. Wilfrieda, D. Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes |
author_facet |
Fonseca, Gustavo Vanreusel, A. Wilfrieda, D. |
author_sort |
Fonseca, Gustavo |
title |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes |
title_short |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes |
title_full |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes |
title_fullStr |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes |
title_full_unstemmed |
Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes |
title_sort |
taxonomy and biogeography of molgolaimus ditlevsen, 1921 (nematoda: chromadoria) with references to the origins of deep sea nematodes |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/14936/ https://doi.org/10.1017/S0950102006000034 https://hdl.handle.net/10013/epic.25143 |
geographic |
Pacific Weddell Weddell Sea |
geographic_facet |
Pacific Weddell Weddell Sea |
genre |
Antarctic Science Weddell Sea |
genre_facet |
Antarctic Science Weddell Sea |
op_source |
EPIC3Antarctic science, 18(1), pp. 23-50 |
op_relation |
Fonseca, G. , Vanreusel, A. and Wilfrieda, D. (2006) Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with references to the origins of deep sea nematodes , Antarctic science, 18 (1), pp. 23-50 . doi:10.1017/S0950102006000034 <https://doi.org/10.1017/S0950102006000034> , hdl:10013/epic.25143 |
op_doi |
https://doi.org/10.1017/S0950102006000034 |
_version_ |
1766287233460994048 |