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NameFONSECA, G.; VANREUSEL, A. AND DECRAEMER, W. (2006). Taxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes Antarctic Science 18 (1), 23–50 (2006)
DOI10.1017/S0954102006000034
AuthorsFONSECA, G.; VANREUSEL, A. AND DECRAEMER, W.
Year2006
TitleTaxonomy and biogeography of Molgolaimus Ditlevsen, 1921 (Nematoda: Chromadoria) with reference to the origins of deep sea nematodes
JournalAntarctic Science 18 (1), 23–50 (2006)
Type Publication
NoteNeMys doc_id: 16476
Full textAvailable for editors  PDF available
AbstractMolgolaimus 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.
Taxa
(4)
Unreviewed: has not been verified by a taxonomic editorMetepsilonema Steiner, 1927 (additional source)
Unreviewed: has not been verified by a taxonomic editorMolgolaimus Ditlevsen, 1921 (additional source)
Checked: verified by a taxonomic editorMolgolaimus minutus Jensen, 1978 (additional source)
Checked: verified by a taxonomic editorMolgolaimus turgofrons Lorenzen, 1972 (additional source)
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2014-06-18 16:05:08Z  created  Vanaverbeke, Jan
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