Welkom op het expertplatform!
Dit platform verschaft informatie en kennis omtrent de WL expertisedomeinen 'hydraulica en sediment', 'havens en waterwegen', 'waterbouwkundige constructies', 'waterbeheer' en 'kustbescherming' - gaande van WL medewerkers met hun expertise, het curriculum van deze instelling, tot publicaties, projecten, data (op termijn) en evenementen waarin het WL betrokken is.
Het WL onderschrijft het belang van "open access" voor de ontsluiting van haar onderzoeksresultaten. Lees er meer over in ons openaccessbeleid.
Integrative taxonomy in two free-living nematode species complexes
In: Biological Journal of the Linnean Society. Academic Press: London; New York. ISSN 0024-4066; e-ISSN 1095-8312
|  |
| Trefwoorden |
Biology > Organism morphology > Animal morphology
Classification > Taxonomy
Halomonhystera disjuncta (Bastian, 1865) Andrássy, 2006 [WoRMS]; Nematoda [WoRMS]; Rhabditis (Pellioditis) marina (Bastian, 1865) Dougherty, 1955 [WoRMS]
Marien/Kust |
| Author keywords |
COI; D2D3; ITS; marine nematodes; morphology |
| Auteurs | | Top |
- Fonseca, G.
- Derycke, S.
- Moens, T.
|
|
|
| Abstract |
Integrative taxonomy considers species boundaries from multiple, complementary perspectives, with the main objective being to compare the observed data against the predictions of the methodologies used. In the present study we used three methods for delineating species boundaries within the cosmopolitan nematode species Rhabditis (Pellioditis) marina and Halomonhystera disjuncta. First, phylogenetic relationships among molecular sequences from the mitochondrial cytochrome oxidase c subunit 1 gene (COI), and from two nuclear regions, internal transcribed spacer (ITS) and D2D3, were analysed. Subsequently, multivariate morphometric analysis was used to investigate whether concordant molecular lineages were also morphologically distinct. When morphological differences were found, typological taxonomy was performed to identify fixed or non-overlapping characters between lineages. Interbreeding experiments were conducted between the two closest related lineages of R. (P.) marina to investigate potential reproductive isolation. This integrative approach confirmed the presence of several species within each nominal species: molecular lineages were concordant across two independent loci (COI and ITS), and were characterized by significant morphological divergence. Most lineages were also detectable in the D2D3 region, but were less resolved. The two lineages investigated in our study did not produce offspring. Our results highlight that classical taxonomy grossly underestimates species diversity within the phylum Nematoda. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
