Eunotia sp. 1 (cf. Eunotia formica Ehrenberg, 1843: p. 414)

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 : 15-16

Eunotia sp. 1 (cf. Eunotia formica Ehrenberg, 1843: p. 414) Fig. 9

Morphometric data.

Length 117 µm, width c8, m6, p10 µm; striae density c9, p11 in 10 µm.

Distribution in Ukraine.

The Cheremsky Nature Reserve, tract Obkopane, Lake Redychi, epiphyton on Sphagnum sp.

Comments.

This specimen is most similar to E. formica which is widely distributed and has been found on all continents except Antarctica (Gury M in Guiry and Guiry 2019). The original illustrations of E. formica by Ehrenberg were not introduced in primary description and the species concept in literature is different from our exemplar, which has narrower valves and rhombic poles (see Krammer and Lange-Bertalot 1991: p. 209, pl. 152/8-12a; Lange-Bertalot and Metzeltin 1996: p. 144, pl. 13/1, 2; Ortiz-Lerín and Cambra 2007: p. 424, fig.3/T; Taylor et al. 2007: pl. 22/figs 1, 3).

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).