Cymbella subtruncata Krammer; 2002; 39
Key references
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
Size
29-41 µm long, 6.5-8.5 µm wide (UK population).
Shape
Valves with convex dorsal margin, ventral margin more or less straight; valve ends protracted, subrostrate to rostrate, broadly rounded.
Symmetry
Dorsiventral, isopolar.
Striae
Striae parallel to slightly radiate, becoming radiate towards valve ends, 9-10 in 10 µm; areolae clearly visible.
Axial area
Narrow, linear, slightly curved.
Central area
Not differentiated or very slightly widened.
Raphe
Raphe more or less in centre of valve, raphe curved towards ventral margin in valve centre; proximal ends slightly enlarged, bent dorsally, dorsally deflected terminal fissures.
SEM morphology
Striae uniseriate, rarely biseriate adjacent to axial area, composed of transapically orientated slit-like areolae. One stigma adjacent to central ventral stria.
29-41 µm long, 6.5-8.5 µm wide (UK population).
Shape
Valves with convex dorsal margin, ventral margin more or less straight; valve ends protracted, subrostrate to rostrate, broadly rounded.
Symmetry
Dorsiventral, isopolar.
Striae
Striae parallel to slightly radiate, becoming radiate towards valve ends, 9-10 in 10 µm; areolae clearly visible.
Axial area
Narrow, linear, slightly curved.
Central area
Not differentiated or very slightly widened.
Raphe
Raphe more or less in centre of valve, raphe curved towards ventral margin in valve centre; proximal ends slightly enlarged, bent dorsally, dorsally deflected terminal fissures.
SEM morphology
Striae uniseriate, rarely biseriate adjacent to axial area, composed of transapically orientated slit-like areolae. One stigma adjacent to central ventral stria.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| 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; Taxonomy; Description; Type Illustration |
This page should be cited as:
Jüttner I., Chudaev D., Ector L., Williams D.M., Van de Vijver B. Cymbella subtruncata Krammer; 2002; 39. 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=4682. [Accessed:
].
Image Gallery
Record last modified: 09/12/2022