Taxon Account

Navicula viridula (Kützing) Ehrenberg; 1836; 53

Key references

Lange-Bertalot H. 1980. Zur taxonomischen Revision einiger ökologisch wichtiger «Naviculae lineolatae» Cleve. Die Formenkreise um Navicula lanceolata, N. viridula, N. cari. Cryptogamie: Algologie. 1(1): 29-50.

Morphology

Size
53-64 µm long, 13-14 µm wide (UK population), 40-100 µm long, 10-15 wide (Lange-Bertalot 2001).

Shape
Valves linear-lanceolate, margins slightly convex, protracted rostrate ends.

Symmetry
Isopolar, bilaterally symmetrical.

Striae
Radiate in valve centre, becoming convergent towards apices, 8-10 in 10 µm (UK population), 8-11 in 10 µm (Lange-Bertalot 2001). Areolae clearly discernible in LM, 27-29 in 10 µm (UK population), c. 24 in 10 µm (Lange-Bertalot 2001).

Axial area
Narrow, linear.

Central area
Large rounded, asymmetrical, central area, occupying approximately half of the valve width.

Raphe
Raphe filiform with expanded central pores deflected to the primary side and asymmetrical central nodule.

Literature

References are given in chronological order.

Reference
Citation
Kützing F.T. 1833. Synopsis Diatomacearum oder Versuch einer systematischen Zusammenstellung der Diatomeen. Linnaea 8(5). 529-620 pp; XIII-XIX pls. Illustrations; Morphology
Ehrenberg C.G. 1836. Mittheilungen über fossile Infusionsthiere. Bericht über die zur Bekanntmachung geeigneten Verhandlungen der Königlich-Preussischen Akademie der Wissenschaften zu Berlin Vol. 1836. 50-54. Taxonomy
Lange-Bertalot H. 1980. Zur taxonomischen Revision einiger ökologisch wichtiger «Naviculae lineolatae» Cleve. Die Formenkreise um Navicula lanceolata, N. viridula, N. cari. Cryptogamie: Algologie. 1(1): 29-50. Morphology; Taxonomy; Type Illustration;
Krammer K., Lange-Bertalot H. 1986. Süßwasserflora Mitteleuropas. Bacillariophyceae. 1. Teil. Naviculaceae. Eds Ettl H., Gerloff J., Heynig H., Mollenhauer D., Gustav Fischer Verlag, Stuttgart. 876 pp Morphology; Illustrations
Winter J.G., Duthie H.C. 2000. Epilithic diatoms as indicators of stream total N and total P concentration. Journal of the North American Benthological Society. 19(1): 32-49. Ecology
Winter J.G., Duthie H.C. 2000. Stream epilithic, epipelic and epiphytic diatoms: habitat fidelity and use in biomonitoring. Aquatic Ecology. 34: 345-353. Ecology
Lange-Bertalot H. 2001. Navicula sensu stricto, 10 genera seperated from Navicula sensu lato, Frustulia. 2. Lange-Bertalot H. (ed.), Diatoms of Europe, Diatoms of the European Inland waters and comparable habitats. A.R.G. Gantner Verlag K.G., Ruggell. 526 pp Morphology; Illustrations; Ecology
This page should be cited as:

Chudaev D., Jüttner I. Navicula viridula (Kützing) Ehrenberg; 1836; 53. In: Jüttner I., Bennion H., Carter C., Cox E.J., Ector L., Flower R., Jones V., Kelly M.G., Mann D.G., Sayer C., Turner J. A., 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=2957. [Accessed:  ].

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Record last modified: 27/12/2020