Abstract
A total of 102 taxa, distributed among 25 genera, were recorded in an epilithic sample. The community was predominated by Navicula veneta and significant diatoms were as follows: Cyclotella ocellata, C. orientalis, C. rossii, Cyclostephanos tholiformis, Stephanodiscus aff. vestibulis, Achnanthes alteragracillima, A. flexella, Eunotia aff. botuliformis, Gomphonema hedinii, Navicula schubartii, N wildii, N. aff. novaesiberica, Simonsenia aff. delognei.