Taxon Account

Encyonema reichardtii (Krammer) Mann in Round et al.; 1990; 667

Synonymy

Cymbella reichardtii Krammer in Krammer & Lange-Bertalot 1985

Key references

Krammer K., Lange-Bertalot H. 1985. Naviculaceae Neue und wenig bekannte Taxa, neue Kombinationen und Synonyme sowie Bemerkungen zu einigen Gattungen. 9. Bibliotheca Diatomologica. 230 pp

Morphology

Shape
Valves cymbelloid with convex dorsal margin, slightly convex ventral margin, and rounded ends.

Symmetry
Dorsiventral.

Striae
Striae parallel dorsally, parallel or slightly radiate ventrally; central dorsal striae wider spaced with one slightly shortened stria, opposite on the ventral side one or two very short striae which hardly extend onto the valve face.

Axial area
Narrow, linear.

Central area
Asymmetrical, rectangular or acute-angled, extending almost to the valve margin on the ventral side, hardly expanded on the dorsal side.

Raphe
Straight with slightly dorsally deflected proximal ends, and distal fissures deflected to the ventral side.

Other features
A single H-shaped chloroplast with a central pyrenoid on the ventral side of the cell.


SEM morphology
External areola openings round, elongate, sometimes doubled, orientated in various directions.

Literature

References are given in chronological order.

Reference
Citation
Krammer K., Lange-Bertalot H. 1985. Naviculaceae Neue und wenig bekannte Taxa, neue Kombinationen und Synonyme sowie Bemerkungen zu einigen Gattungen. 9. Bibliotheca Diatomologica. 230 pp Morphology; Taxonomy; Description; Type Illustration;
Round F.E., Crawford R.M., Mann D.G. 1990. The Diatoms. Biology & Morphology of the Genera. Cambridge University Press, Cambridge. 747 pp Taxonomy
Krammer K. 1997. Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 2. Encyonema part., Encyonopsis and Cymbellopsis. Bibliotheca Diatomologica, Vol. 37, J. Cramer, Berlin. 469 pp Morphology; Type Illustration
This page should be cited as:

Jüttner I. Encyonema reichardtii (Krammer) Mann in Round et al.; 1990; 667. 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=2475. [Accessed:  ].

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Record last modified: 27/12/2020