Eunotia jarensis Lange-Bert. et al., 2003: p. 41, pl. 124/figs 7-11. *^

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 : 11-13

Eunotia jarensis Lange-Bert. et al., 2003: p. 41, pl. 124/figs 7-11. *^ Figs 12 , 12a

Illustrations.

Pavlov and Levkov 2013: p. 13, pl. 13/figs 1-5.

Diagnosis.

Morphometric data: length 63 µm, width 9 µm, striae density c12, p18 in 10 µm. Lange-Bertalot et al. 2003: length 36-76 µm, width 8-10 µm, striae density 10-12 in 10 µm.

Frustule bi-symmetric, bipolar, biraphid with mirror-symmetric, mantle-offset, brevisslit type of raphe. Valves dorsiventral, uniform in width, with two very weak undulations on dorsal margin, weakly concave ventral margin and protracted broadly rounded poles slightly deflected to dorsal side. Striae basal, uniserial, distant, evenly spaced. Areolae small with round foramina (Fig. 12a ). Raphe system consists of two short filiform slits on ventral valve mantle; helictoglossae average in size; one rimoportula present at the middle of pole (Fig. 12a ).

Ecology.

Freshwater species, epiphytic on the moss, at an altitude of about 2300 m a.s. ( Pavlov and Levkov 2013).

Distribution.

EUROPE: Type locality: ITALY, Pauli Murdegu, Insula Sardinia ( Lange-Bertalot et al. 2003); North Macedonia, Shara Mountain, stream above glacial Lake Crno ( Pavlov and Levkov 2013); Ukraine (present paper). In Ukraine. The Cheremsky Nature Reserve, tract Obkopane, ditch, epiphyton on Sphagnum sp.

Type information.

25.05.1994, leg. A. Bardi, (Praep. No. Eu-I-159 in Coll. Lange-Bertalot, Botan. Institut Universität Frankfurt a.M.).

Comments.

Raphe system has not been studied from outer valve surface in SEM but this species certainly does not have tr-fissures which are always situated on a hya line field (Fig. 12a ) and distal ends of the raphe slits finish on ventral valve margin at the poles, similar to E. dorofeyukiae (Fig. 27a ).

Most specimens in the population from North Macedonia differ through having much narrower poles ( Pavlov and Levkov 2013: pl. 13/figs 3-6) than in the type population.

Very rare species occurs only in Europe in three localities in low abundance.

Figures

Figures 7 - 12 a. New and rare in Ukraine species of Eunotia Ehrenb. from the Cheremsky Nature Reserve. 7 - 8 a Eunotia julma Lange-Bert. in Lange-Bertalot et al., arrow indicates distal end of raphe slit, double arrow - funnel-like lacuna, terminal fissure is between the arrows 9 Eunotia sp. 1 (cf E. formica Ehrenb.) 10, 11 Eunotia formicina Lange-Bert. in Lange-Bertalot et al. 12, 12 a Eunotia jarensis Lange-Bert. et al., arrow indicates rimoportula. Figs 7, 9 - 11 LM 8, 8 a outside valve surface 12, 12 a inside valve surface, SEM. Scale bars: 10 µm (7 - 17); 3 µm (8 a); 2 µm (12 a).

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).