Global diversity of nemerteans (Nemertea) in freshwater
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- Sundberg, P. & Gibson, R. Hydrobiologia (2008) 595: 61. doi:10.1007/s10750-007-9004-6
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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.