Eunotia ruzickae Bily & Marvan, 1962: p. 293, figs 1-5. *^

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 : 14-15

publication ID

https://dx.doi.org/10.3897/phytokeys.128.35566

persistent identifier

https://treatment.plazi.org/id/40C4D88E-52C8-52D8-91A8-0B7131BC3516

treatment provided by

PhytoKeys by Pensoft

scientific name

Eunotia ruzickae Bily & Marvan, 1962: p. 293, figs 1-5. *^
status

 

Eunotia ruzickae Bily & Marvan, 1962: p. 293, figs 1-5. *^ Fig. 14 View Figures 13–27

Illustrations.

Pavlov and Levkov 2013: pl. 58/fig. 7.

Diagnosis.

Morphometric data: length 44 µm, width cp6, m7 µm; striae density c16, p22 in 10 µm. Bílý and Marvan 1962: length 40-90 µm, width 4.5-6 µm, striae density 13-14 in 10 µm.

Frustule bi-symmetric, bipolar, biraphid with mirror-symmetric, mantle-offset, brevisslit type of raphe. Valves dorsiventral, uniform in width, with slightly undulate dorsal margin and weak depression in its central part, usually straight ventral side, sometimes with weak central convexity (see Bílý and Marvan 1962: fig. 1), and broad rounded poles deflected to dorsal side. Striae basal, uniserial, distant, denser at the poles, irregularly spaced. Raphe system consists of two short filiform slits on ventral valve mantle, distal ends of the slits terminate at the poles about 0.3 of valve width from ventral margin.

Ecology.

Freshwater epiphytic species.

Distribution.

EUROPE: Type location: Czech Republic ( Bílý and Marvan 1962); North Macedonia, ( Pavlov and Levkov 2013); Germany, Scandinavia (M. Guiry in Guiry and Guiry 2019); Ukraine (present paper). In Ukraine. Zhytomyr region, Chervonoarmeisky district, swamp, dark films among mosses.

Type information.

"In bentho piscinae Řežabinec prope vicum Ražice in Bohemia meridionali atque in nonnullis locis Moraviae merdionalis", (Typus in herbario Inst. bot. Univ. Brunensis, Brno).

Comments.

The found exemplar has denser striae than in type population. This species has typical raphe system without terminal raphe fissures, however SEM illustrations of the raphe to confirm this were not found.