Notes on the taxonomy and distribution of the interstitial Rotifera from a dune pool

A preliminary study of the interstitial Rotifera from a dune pool at the Belgian coast yielded several rare and insufficiently known species, namely Colurella salina Althaus, Encentrum? villosum Harring & Myers and Lecane psammophila (Wisziewski). Brief accounts are presented on these and on Colurella hindenburgi Steinecke (new synonym: C. geophila Donner) and Trichocerca taurocephala (Hauer). Of the twenty-five morphotaxa recorded, nine, all of which are psammobionts, are new to the Belgian fauna. Since, the rotifers inhabiting the psammon have not been studied sufficiently, their contribution to species diversity in freshwater habitats is not recognised.