Taxon Account

Eucocconeis flexella (Kützing) Meister; 1912; 95

Synonymy

Achnanthes flexella (Kützing) Brun 1880
Cocconeis flexella (Kützing) Cleve 1895
Cymbella flexella Kützing 1844
Eucocconeis flexella (Kützing) Cleve 1895
Achnanthidium flexellum (Kützing) Brébisson ex Kützing 1849
Achnanthes flexella (Kützing) Mann 1937

Key references

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

Morphology

Shape
Frustules in girdle view flexed with a concave raphe valve and a convex rapheless valve, in valve view elliptic with broadly rounded subrostrate ends.

Symmetry
Isopolar.

Valve
Heterovalvar.

Striae
Radiate on the raphe valve, slightly radiate and punctate on the rapheless valve.

Axial area
Narrow, sigmoid.

Central area
Small, rhombic on the raphe valve; large, elliptic, extended transapically without reaching the valve margin.

Raphe
Sigmoid and inclined in relation to the apical axis.

Other features
A large H-shaped chloroplast.

Literature

References are given in chronological order.

Reference
Citation
Kützing F.T. 1844. Die Kieselschaligen Bacillarien oder Diatomeen. Fr. Fritsch, Nordhausen. 152 pp; 30 pls Morphology; Description; Illustrations
Meister F. 1912. Die Kieselalgen der Schweiz. Beiträge zur Kryptogamenflora der Schweiz. 4(1). K.J. Wyss, Bern. 254 pp; 48 pls Taxonomy; Morphology; Illustrations
Round F.E., Crawford R.M., Mann D.G. 1990. The Diatoms. Biology & Morphology of the Genera. Cambridge University Press, Cambridge. 747 pp Taxonomy; Morphology; Illustrations
Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp Morphology; Ecology; Illustrations;
This page should be cited as:

Carter C. F., Jüttner I. Eucocconeis flexella (Kützing) Meister; 1912; 95. 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 https://naturalhistory.museumwales.ac.uk/diatoms/browsespecies.php?-recid=4248. [Accessed:  ].

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Record last modified: 27/12/2020