Taxon Account

Cymbella subcistula Krammer; 2002; 93

Key references


44-79.5 µm long, 14.5-20 µm wide (UK population).

Valves with strongly convex dorsal margin, ventral margin slightly convex at centre, broadly rounded ends, not or very slightly protracted.

Dorsiventral, isopolar.

Striae radiate, some striae slightly curved, 9-11(12) in 10 µm; areolae visible in LM, 20 in 10 µm (UK population) .

Axial area
Narrow, linear, approximately in centre of valve.

Central area
Round, approximately 1/4-1/3 of valve width.

Raphe lateral becoming filiform near proximal and distal ends, proximal ends expanded, drop-shaped, straight or slightly ventrally deflected; dorsally deflected terminal raphe fissures.

Other features
2-4 stigmata on ventral side of central nodule.


References are given in chronological order.

Krammer K. 2002. Cymbella. Lange-Bertalot H. (ed), Diatoms of Europe, Diatoms of the European Inland Waters and Comparable Habitats, Vol.3, A.R.G. Gantner Verlag K.G., Ruggell. 584 pp Morphology; Illustrations

Similar Species

Similar species not published on this website:

Cymbella perfossilis Krammer; 2002; 99, 100

This page should be cited as:

Jüttner I., Levkov Z., Ector L. Cymbella subcistula Krammer; 2002; 93. 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 [Accessed:  ].

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Record last modified: 06/12/2022