FIRST FINDINGS OF FRESHWATER ALGAE <i>HILDENBRANDIA RIVULARIS</i> (LIEBMANN) J. AGARDH IN KALININGRAD REGION
The present paper documents the ﬁrst ﬁndings of freshwater red algae Hildenbrandia rivularis (Liebmann) J. Agardh in Kaliningrad region in shallow rocky areas of small rivers of the Pregolya River system (Pissa, Angrapa, Krasnaya). It is shown that the species is found not only in pure waters, since the studied rivers are in terms of saprobity from oligo- to mesosaprobic.