Little is known on the biogeography of Rotifera, particularly regarding the littoral taxa . Here, the biogeography of the most specious group of littoral Rotifera, Lecane, is discussed based on a recent revision of the group, and considering only verified records .Only 41 .3% of all 167 Lecane morphospecies are widely distributed . Of these, 21 (12 .6%) are cosmopolitan (sensu strictu), 26 (15 .6%) are Tropicopolitan. There are 6 (3 .6%) Arctic-temperate and Pantropical taxa . These categories of widely distributed taxa are not clear-cut, as differences in latitudinal distribution are largely gradual .