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.
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., 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=2957. [Accessed:
].
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Record last modified: 27/12/2020