TAXONOMIC COMPOSITION OF ROTIFERS IN LAKE-PEIPSI

161 rotifer taxa 46 of which are new records for Estonia were identifi ed in the north-western part of Lake Peipsi. The greatest number of ta xa occurred in August (93), followed by September (79). In all, 19 fam ilies (Monogononta) are represented with 41 genera. The dominant famil ies are Brachionidae (32 taxa) and Synchaetidae (16). The species of A nuraeopsis, Conochillus, Kellicottia, Keratella, Notholca, Polyarthra and Synchaeta are dominating. The taxonomic composition is analysed in the ecological aspect. Some species of zoogeographic interest, includ ing a supposedly endemic Ploesoma peipsiense, are reported.