Abstract
Most ribborn worms (phylum Nemertea) are marine and only 22 of the currently named around 1,200 species are known from freshwater habitats (mainly lakes/ponds). They are all free-living benthic forms found in all continents except Antarctica. The vast majority of species have been recorded from the Palearctic region, but this may reflect sampling efforts rather than biogeography.
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Guest editors: E.V. Balian, C. Lévêque, H. Segers & K. Martens
Freshwater Animal Diversity Assessment
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Sundberg, P., Gibson, R. Global diversity of nemerteans (Nemertea) in freshwater. Hydrobiologia 595, 61–66 (2008). https://doi.org/10.1007/s10750-007-9004-6
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DOI: https://doi.org/10.1007/s10750-007-9004-6