Taxonomy and species distribution of the genus Manganonema Bussau, 1993 (Nematoda: Monhysterida)
Different deep-sea sites are frequently characterized by a high number of species belonging to the same genus. In addition, some deep-sea genera (e.g. Acantholaimus, Monhystera, Halalaimus) seem to be dominant and present world- wide. The genus Manganonema is present in all oceans in low to medium d...
| Main Authors: | , , |
|---|---|
| Format: | Text |
| Language: | unknown |
| Published: |
Station Biologique de Roscoff (SBR)
2006
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.21411/cbm.a.1e594193 http://application.sb-roscoff.fr/cbm/doi/10.21411/CBM.A.1E594193 |
| Summary: | Different deep-sea sites are frequently characterized by a high number of species belonging to the same genus. In addition, some deep-sea genera (e.g. Acantholaimus, Monhystera, Halalaimus) seem to be dominant and present world- wide. The genus Manganonema is present in all oceans in low to medium densities (< 2%) and, apparently, restricted to the deep sea (600 m and deeper). The present study deals with a revision of the genus Manganonema based upon known species and nine new species, where only 5 were named due to the lack of males (M. media sp. nov., M. pitilica sp. nov., M. robus- tus sp. nov., M. antarctica sp. nov., M. bussauensis sp. nov.). For the species identification, important characters are sum- marized in a pictorial key. The material studied was collected from six different sites: two in the North Atlantic (Europe), two in the Southern Ocean (Antarctic), one in the South-western Atlantic (Brazil), and one in Western Indian Ocean (Kenya). The species distribution suggests a high turnover of species between sites. Only one Manganonema species is recorded from two different sites in the Atlantic Ocean. These results suggest a high degree of endemism of species within the genus. |
|---|