Taxon Account

Eunotia serra Ehrenberg; 1837; 45

Key references

Brant L.A., Furey P.C. 2011. Morphological variation in Eunotia serra, with a focus on the rimoportula. Diatom Research. 26(2): 221-226.


Length 40-165 µm, width 12-16 µm (Brant & Furey 2011, Lange-Bertalot et al. 2011).

Dorsal margin convex with 6-18 (Metzeltin & Lange-Bertalot 2007), 22 (Brant & Furey 2011) undulations, concave ventral margin.

Dorsiventral, isopolar.

Striae parallel, becoming slightly radiate and curved near valve ends. Striae mostly equidistant, 10-16 in 10 µm, up to 20 in 10 µm near valve ends (Lange-Bertalot et al. 2011); shorter striae sometimes intercalated at dorsal margin.

Raphe curving onto valve face close to valve ends, terminating approximately halfway between ventral and dorsal margin.


References are given in chronological order.

Ehrenberg C.G. 1837. Über ein aus fossilen Infusorien bestehendes, 1832 zu Brod verbackenes Bergmehl von den Grenzen Lapplands in Schweden. Bericht über die zur Bekanntmachung geeigneten Verhandlungen der Königlich-Preussischen Akademie der Wissenschaften zu Berlin 1837. 43-45 pp Morphology; Description
Ehrenberg C.G. 1838. Die Infusionsthierchen als vollkommene Organismen. Ein Blick in das tiefere organische Leben de Natur. Verlag von Leopold Voss, Leipzig. 1-xvii, 1-548 pp; 1-64 pls Morphology; Description; Illustrations
Mayama S., Kobayasi H. 1990. Studies on Eunotia species in the classical 'Degernäs Materials' housed in the Swedish Museum of Natural History. Diatom Research. 5(2): 351-366. Morphology; Illustrations; Ecology
Leira M. 2005. Diatom responses to Holocene environmental changes in a small lake in northwest Spain. Quaternary International. 140-141: 90-102. Ecology
Metzeltin D., Lange-Bertalot H. 2007. Tropical diatoms of South America II. Special remarks on biogeography disjunction. Iconographia Diatomologica, Vol. 18., Annotated Diatom Micrographs. Diversity-Taxonomy-Biogeography. H. Lange-Bertalot (ed.), A.R.G. Gantner Verlag K.G. 877 pp Morphology; Illustrations
Arita S., Ohtsuka T. 2008. The shape variation of Eunotia serra Ehrenb. with size reduction, especially the change in the dorsal undulation. Diatom. 24: 42-50. Morphology; Illustrations
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; Ecology; Illustrations
Brant L.A., Furey P.C. 2011. Morphological variation in Eunotia serra, with a focus on the rimoportula. Diatom Research. 26(2): 221-226. Morphology; Illustrations;
This page should be cited as:

Jüttner I., Chillery N. Eunotia serra Ehrenberg; 1837; 45. In: Jüttner I., Carter C., Chudaev D., 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 [Accessed:  ].

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Record last modified: 05/12/2022