Navicula slesvicensis Grunow in Van Heurck; 1880; pl.7
Key references
Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp
Morphology
Shape
Valves narrowly lanceolate to elliptical with bluntly subrostrate, rounded apices.
Symmetry
Isopolar, bilaterally symmetrical.
Striae
Radiate through most of the valve, becoming parallel near the apices and convergent at the apices; striae clearly cross-lineate with visible areolae; 1-3 shorter central striae are more widely spaced.
Axial area
Narrow linear, more refractive on one side of the raphe slit than the other.
Central area
Round to slightly transapically expanded, sometimes slightly asymmetrical, with three or four shortened striae on either side, ca. 1/3 to 1/2 of the valve width.
Raphe
Straight with expanded central endings, terminating within the central area; terminal fissures hooked very close to the apices.
Valves narrowly lanceolate to elliptical with bluntly subrostrate, rounded apices.
Symmetry
Isopolar, bilaterally symmetrical.
Striae
Radiate through most of the valve, becoming parallel near the apices and convergent at the apices; striae clearly cross-lineate with visible areolae; 1-3 shorter central striae are more widely spaced.
Axial area
Narrow linear, more refractive on one side of the raphe slit than the other.
Central area
Round to slightly transapically expanded, sometimes slightly asymmetrical, with three or four shortened striae on either side, ca. 1/3 to 1/2 of the valve width.
Raphe
Straight with expanded central endings, terminating within the central area; terminal fissures hooked very close to the apices.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Van Heurck H. 1880. Synopsis des Diatomées de Belgique. Atlas. Ducaju & Cie., Anvers.; 1-30 pls | Morphology; Illustrations |
| 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 |
| Hofmann G., Werum M., Lange-Bertalot H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. A.R.G. Gantner, Ruggell. 908 pp | Morphology; Ecology; Illustrations; |
This page should be cited as:
Cox E. J., Jones V., Jüttner I. Navicula slesvicensis Grunow in Van Heurck; 1880; pl.7 . 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=2496. [Accessed:
].
Image Gallery
Record last modified: 27/12/2020