Taxon Account

Epithemia sorex Kützing; 1844; 33

Key references

Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp


Strongly convex dorsal margin, concave ventral margin; rostrate ends.

Dorsiventral, isopolar.

Punctate, radiate.

Axial area
Narrow, biarcuate, bending towards and terminating often close to the dorsal margin.

Not visible in LM.

SEM morphology
Biseriate striae with external areola openings c-shaped, occluded by round flaps. Striae extend onto the mantle interrupted by a narrow hyaline area along the dorsal valve margin.

Raphe curved towards the dorsal margin with small drop-shaped ends. Ventrally the distal raphe sections continue along the valve margin.

Several girdle bands.


References are given in chronological order.

Kützing F.T. 1844. Die Kieselschaligen Bacillarien oder Diatomeen. Fr. Fritsch, Nordhausen. 152 pp; 30 pls Morphology; Description; Illustrations
Schoenman F.R., Archibald R.E.M. 1976. The Diatom Flora of Southern Africa. National Institute for Water Research, Council for Scientific and Industrial Research, WAT 50. Morphology; Type Illustration
Sims P.A. 1983. A taxonomic study of the genus Epithemia with special reference to the type species E. turgida (Ehrenb.) Kütz. Bacillaria. 6: 211-235. Morphology; Illustrations
Nejadsattari, T. 2005. The diatom flora of Lake Neure, Iran. Diatom Research. 20(2): 313-333. Ecology
You Q., Liu Y., Wang Y., Wang Q. 2009. Taxonomy and distribution of diatoms in the genera Epithemia and Rhopalodia from the Xinjiang Uygur Autonomous Region, China. Nova Hedwigia. 89(3-4): 397-430. Morphology; Ecology; Illustrations
Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp Morphology; Illustrations;
Vishnyakov V.S., Kulikovskiy M., Genkal S., Dorofeyuk N.I., Lange-Bertalot H., Kuznetsova I.V. 2014. Taxonomy and geographical distribution of the diatom genus Epithemia Kützing in water bodies of Central Asia. Inland Water Biology. 7(4): 318–330. Morphology; Ecology; Illustrations
This page should be cited as:

Jüttner I. Epithemia sorex Kützing; 1844; 33. 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: 27/12/2020