TY JOUR TI MORPHOLOGY OF SEMIORBIS HEMICYCLUS (EHRENBERG) R. M. PATRICK (BACILLARIOPHYTA) — A RARE SPECIES FOR THE FLORA OF RUSSIA KW Republic of Karelia KW Lake Pizanets KW Bacillariophyta KW Semiorbis hemicyclus KW electron microscopy KW morphology JO Transactions of Papanin Institute for Biology of Inland Waters RAS AU Genkal, S.I. AU Komulaynen, S.F. PY 2025 IS 0 PB Papanin Institute for Biology of Inland Waters Russian Academy of Sciences