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Fonseca, G.; Derycke, S.; Moens, T. (2008). Integrative taxonomy in two free-living nematode species complexes. Biological Journal of the Linnean Society. 94(4): 737-753.
179304
10.1111/j.1095-8312.2008.01015.x [view]
Fonseca, G.; Derycke, S.; Moens, T.
2008
Integrative taxonomy in two free-living nematode species complexes
Biological Journal of the Linnean Society
94(4): 737-753
Publication
NeMys doc_id: 17894
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.
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Halomonhystera Andrássy, 2006 (additional source)
Halomonhystera ambiguoides (Bütschli, 1874) (additional source)
Halomonhystera chitwoodi (Steiner, 1958) Andrássy, 2006 (additional source)
Halomonhystera continentalis Andrássy, 2006 (additional source)
Halomonhystera disjuncta (Bastian, 1865) Andrássy, 2006 (additional source)
Halomonhystera glaciei (Blome & Riemann, 1999) Andrássy, 2006 (additional source)
Halomonhystera uniformis (Cobb, 1914) Andrássy, 2006 (additional source)
Rhabditis (Pellioditis) marina (Bastian, 1865) Dougherty, 1955 accepted as Litoditis marina (Bastian, 1865) Sudhaus, 2011 (additional source)
Rhabditis (Rhabditis) nidrosiensis Allgén, 1933 (additional source)
Rhabditis bengalensis Timm, 1956 accepted as Oscheius bengalensis (Timm, 1956) (additional source)
Rhabditis littorea Sudhaus & Nimrich, 1989 represented as Rhabditis (Pellioditis) littorea Sudhaus & Nimrich, 1989 accepted as Reiterina littorea (Sudhaus & Nimrich, 1989) Sudhaus, 2011 (additional source)
Rhabditis marina meditteranea represented as Rhabditis (Pellioditis) marina mediterranea Sudhaus, 1974 accepted as Rhabditis (Pellioditis) meditteranea (Sudhaus, 1974) Andrássy, 1983 (additional source)
Rhabditis typica Stefański, 1922 accepted as Reiterina typica (Stefanski, 1922) Sudhaus, 2011 (additional source)
Halomonhystera ambiguoides (Bütschli, 1874) (additional source)
Halomonhystera chitwoodi (Steiner, 1958) Andrássy, 2006 (additional source)
Halomonhystera continentalis Andrássy, 2006 (additional source)
Halomonhystera disjuncta (Bastian, 1865) Andrássy, 2006 (additional source)
Halomonhystera glaciei (Blome & Riemann, 1999) Andrássy, 2006 (additional source)
Halomonhystera uniformis (Cobb, 1914) Andrássy, 2006 (additional source)
Rhabditis (Pellioditis) marina (Bastian, 1865) Dougherty, 1955 accepted as Litoditis marina (Bastian, 1865) Sudhaus, 2011 (additional source)
Rhabditis (Rhabditis) nidrosiensis Allgén, 1933 (additional source)
Rhabditis bengalensis Timm, 1956 accepted as Oscheius bengalensis (Timm, 1956) (additional source)
Rhabditis littorea Sudhaus & Nimrich, 1989 represented as Rhabditis (Pellioditis) littorea Sudhaus & Nimrich, 1989 accepted as Reiterina littorea (Sudhaus & Nimrich, 1989) Sudhaus, 2011 (additional source)
Rhabditis marina meditteranea represented as Rhabditis (Pellioditis) marina mediterranea Sudhaus, 1974 accepted as Rhabditis (Pellioditis) meditteranea (Sudhaus, 1974) Andrássy, 1983 (additional source)
Rhabditis typica Stefański, 1922 accepted as Reiterina typica (Stefanski, 1922) Sudhaus, 2011 (additional source)