New and rare in Ukraine species of Eunotia Ehrenb. from Ukrainian Polissya and the Lectotypes of two Eunotia species. 13, 13a Eunotia pseudoflexuosa Hust., arrow indicates rimoportula at the middle of pole where raphe slit distal end finishes on the outer valve surface, double arrow – position of terminal fissure distal end on the outer valve surface, between the arrows – hyaline field from inside valve surface where the terminal fissure is located on the outer valve surface 14 Eunotia ruzickae Bílý & Marvan 15, 16 Eunotia implicata Nörpel-Schempp et al. Lectotype: 15 = Eunotia impressa var. angusta Grunow in Van Heurck 1881: pl. 33/fig. 22, designated here 17, 17a Eunotia sp. 2 (cf. mongolica Kulikovskiy et al.) 18–20 Eunotia sp. 3 (cf. Eunotia paludosa Grunow) 21–23 Eunotia incisa W. Smith ex Gregory. Lectotype: 23 = Eunotia incisa W. Smith ex Gregory 1854: pl. 4/fig. 4, designated here 24 Eunotia sp. 4 (cf. Eunotia intermedia (Krasske ex Hustedt) Nörpel & Lange-Bert.) 25–27 Eunotia sp. 5 (cf. Eunotia meridiana Metzeltin & Lange-Bert.). Figs 13, 17, 18 SEM: 13, 13a inside valve surface 17, 17a, 18 outside valve surface; 19–28 LM. Scale bars: 10 µm (13–17, 19–27); 5 µm (18); 1 µm (13a, 17a).