Morphology of the new for Ukraine Bacillariophyta from the hydrotopes of the Rightbank forest-steepe. I. Species of Gomphonema Ehrenb.

Two new for Ukraine territory species Gomphonema italicum Kütz. and G. pseudoaugur Lange-Bert. are found in the hydrotopes of the Rightbank forest-steepe. Morphological descriptions, microphotographs as well as common and local distribution are provided