Eunotia pseudoflexuosa Hustedt, 1949: p. 71, pl. 2/figs 16-18. *^

Bukhtiyarova, Lyudmila N., 2019, The genus Eunotia Ehrenb. (Bacillariophyta) in the Cheremsky Nature Reserve, Ukrainian Polissya, and refined terminology relevant to the raphe system morphology, PhytoKeys 128, pp. 1-31 : 14

Eunotia pseudoflexuosa Hustedt, 1949: p. 71, pl. 2/figs 16-18. *^ Figs 13 , 13a

Illustrations.

Simonsen 1987: p. 340, pl. 522/figs 1-6; Kulikovskiy et al. 2010b: pl. 26/figs 1, 2, 4, 5 (LM), 3, 6, 7 (SEM); Kulikovskiy et al. 2016: pl. 26/figs 5-8; Bahls et al. 2018: pl. 83/fig. 1, pl. 112/fig. 6.

Diagnosis.

Morphometric data: length 112 µm, width 4 µm, striae density 11 in 10 µm.

Kulikovskiy et al. 2016: length 80-180 µm, width 4-6 µm, striae density c11-14, p15-20 in 10 µm.

Frustule bi-symmetric, bipolar, biraphid with mirror-symmetric, mantle-offset, brevisslit type of raphe. Valves dorsiventral, uniform in width, with subcapitate poles deflected to dorsal side. Striae basal, uniserial, distant, evenly spaced (Fig. 13a ). Areolae small with round outer foramina. Raphe system consists of two short filiform slits on ventral valve mantle; tr-fissures long, occupy 7-8 striae in the middle of valve width; helictoglossa average in size (Fig. 13a ).

Ecology.

Freshwater epiphytic species.

Distribution.

AFRICA: Type location: [Democratic Republic of the Congo, Virunga National Park], vulkan region, Lake Karisimbi. EUROPE: Russia ( Kulikovskiy et al. 2016); Ukraine (present paper). ASIA: Mongolia ( Kulikovskiy et al. 2010b); Russia ( Kulikovskiy et al. 2016). N. AMERICA: Canada ( Bahls et al. 2018); USA, Alaska (M. Gury in Guiry and Guiry 2019). In Ukraine. The Cheremsky Nature Reserve, tract Obkopane, ditch, epiphyton on Sphagnum sp.

Type information.

"Albert-National park in Belgisch-Kongo."

Figures

Figures 13 - 27. New and rare in Ukraine species of Eunotia Ehrenb. from Ukrainian Polissya and the Lectotypes of two Eunotia species. 13, 13 a 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 Bily & Marvan 15, 16 Eunotia implicata Noerpel-Schempp et al. Lectotype: 15 = Eunotia impressa var. angusta Grunow in Van Heurck 1881: pl. 33 / fig. 22, designated here 17, 17 a Eunotia sp. 2 (Eunotia 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) Noerpel & Lange-Bert.) 25 - 27 Eunotia sp. 5 (cf. Eunotia meridiana Metzeltin & Lange-Bert.). Figs 13, 17, 18 SEM: 13, 13 a inside valve surface 17, 17 a, 18 outside valve surface; 19 - 28 LM. Scale bars: 10 µm (13 - 17, 19 - 27); 5 µm (18); 1 µm (13 a, 17 a).