TY JOUR TI MORPHOLOGICAL VARIABILITY OF TWO SPECIES OF THE GENUS SURIRELLA (BACILLARIOPHYTA) FROM UDMURTIA KW Kilmez River (Udmurtia) KW phytobenthos KW Bacillariophyta KW Surirella KW morphology KW electron microscopy JO Transactions of Papanin Institute for Biology of Inland Waters RAS AU Genkal, S.I. AU Goskova, S.M. PY 2025 IS 0 PB Papanin Institute for Biology of Inland Waters Russian Academy of Sciences