Eunotia bilunaris (Ehrenberg) Schaarschmidt; 1881; 159
Key references
Lange-Bertalot H., Bąk M., Witkowski A. 2011. Eunotia and some related genera. Diatoms of European Inland Waters and Comparable Habitats. A.R.G. Gantner Verlag K.G., Ruggell. 747 pp
Morphology
Size
14-105 µm long, 3.5-5.5 µm wide (UK and other populations, Lange-Bertalot et al. 2011).
Shape
Valves arcuate with rounded, slightly tapering ends, rarely slightly inflated; the ends are more acute in smaller valves.
Symmetry
Isopolar.
Striae
Striae parallel (13-17 in 10 µm).
Raphe
Short raphe near the valve ends; terminal fissures bent on the valve face towards the valve centre and visible in LM, proximal raphe ends slightly expanded and located on the mantle.
SEM morphology
Uniseriate striae with round, occluded external areola openings between shallow ribs on the valve surface.
Very short spines can be located along the valve margin.
Several girdle bands, open at the opposite ends of the frustule.
A rimoportula present at one pole, marked by a larger pore on the mantle externally.
14-105 µm long, 3.5-5.5 µm wide (UK and other populations, Lange-Bertalot et al. 2011).
Shape
Valves arcuate with rounded, slightly tapering ends, rarely slightly inflated; the ends are more acute in smaller valves.
Symmetry
Isopolar.
Striae
Striae parallel (13-17 in 10 µm).
Raphe
Short raphe near the valve ends; terminal fissures bent on the valve face towards the valve centre and visible in LM, proximal raphe ends slightly expanded and located on the mantle.
SEM morphology
Uniseriate striae with round, occluded external areola openings between shallow ribs on the valve surface.
Very short spines can be located along the valve margin.
Several girdle bands, open at the opposite ends of the frustule.
A rimoportula present at one pole, marked by a larger pore on the mantle externally.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Schaarschmidt G. 1881. Algae in A Kanitz, Plantas Romaniae hucusque cognitas. Magyar Novenytani Lapok. 5: 151-165, 261-268. | Morphology; Description |
| Krammer K., Lange-Bertalot H. 1991. Süßwasserflora Mitteleuropas. Bacillariophyceae. 3. Teil. Centrales, Fragilariaceae, Eunotiaceae. Eds Ettl H., Gerloff J., Heynig H., Mollenhauer D., Gustav Fischer Verlag, Stuttgart. 576 pp | Morphology; Taxonomy; Illustrations; Ecology |
| Alles E., Nörpel-Schempp M., Lange-Bertalot H. 1991. Zur Systematik und Ökologie charakteristischer Eunotia-Arten (Bacillariophyceae) in elektrolytarmen Bachoberläufen. Nova Hedwigia. 53(1-2): 171-213. | Morphology; Ecology; Illustrations |
| Passy, S. I. 2006. Diatom community dynamics in streams of chronic and episodic acidification: the roles of environment and time. Journal of Phycology. 42: 312-323. | Ecology |
| Vanormelingen P., Chepurnov V.A., Mann D.G., Sabbe K,, Vyverman W. 2008. Genetic divergence and reproductive barriers among morphologically heterogeneous sympatric clones of Eunotia bilunaris sensu lato (Bacillariophyta). Protist. 159(1): 73-90. | Illustrations; Morphology; Biology |
| Lange-Bertalot H., Bąk M., Witkowski A. 2011. Eunotia and some related genera. Diatoms of European Inland Waters and Comparable Habitats. A.R.G. Gantner Verlag K.G., Ruggell. 747 pp | Illustrations; Morphology; Ecology; |
This page should be cited as:
Flower R., Jüttner I. Eunotia bilunaris (Ehrenberg) Schaarschmidt; 1881; 159. In: Jüttner I., Carter C., Cox E.J., Ector L., Jones V., Kelly M.G., Kennedy B., Mann D.G., Turner J. A., Van de Vijver B., Wetzel C.E., Williams D.M..
Freshwater Diatom Flora of Britain and Ireland. Amgueddfa Cymru - National Museum Wales. Available online at https://naturalhistory.museumwales.ac.uk/diatoms/browsespecies.php?-recid=2390. [Accessed:
].
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Record last modified: 27/12/2020