Fragilaria ennerdalensis Van de Vijver, M.Kelly, C.E.Wetzel & Ector; 2021; 144
Key references
Van de Vijver B., Williams D.M., Kelly M., Jarlman A., Wetzel C.E., Ector L. 2021. Analysis of some species resembling Fragilaria capucina (Fragilariaceae, Bacillariophyta). Fottea. 21(2): 128-151.
Morphology
Size
Length: 22-48 µm, width: 3-4 µm (Van de Vijver et al. 2021).
Shape
Valves linear to narrow linear-lanceolate with almost parallel to weakly convex margins, gradually tapering towards protracted, subrostrate poles.
Symmetry
Isopolar, bilaterally symmetrical.
Striae
Striae parallel, becoming weakly radiate near poles, 17-18 in 10 µm.
Axial area
Sternum very narrow.
Central area
Central area asymmetrical, slightly swollen and unilaterally expanded, forming a hyaline zone, striae on opposite side irregularly shortened. Ghost striae occasionally observed.
Other features
Frustules solitary.
SEM morphology
Striae usually uniseriate, occasionally biseriate; areolae rounded.
Ghost striae in central area long, narrow slits.
Valve margin with continuous row of small shark tooth-shaped spines, poles without spines.
Valve with one rimoportula at pole.
Length: 22-48 µm, width: 3-4 µm (Van de Vijver et al. 2021).
Shape
Valves linear to narrow linear-lanceolate with almost parallel to weakly convex margins, gradually tapering towards protracted, subrostrate poles.
Symmetry
Isopolar, bilaterally symmetrical.
Striae
Striae parallel, becoming weakly radiate near poles, 17-18 in 10 µm.
Axial area
Sternum very narrow.
Central area
Central area asymmetrical, slightly swollen and unilaterally expanded, forming a hyaline zone, striae on opposite side irregularly shortened. Ghost striae occasionally observed.
Other features
Frustules solitary.
SEM morphology
Striae usually uniseriate, occasionally biseriate; areolae rounded.
Ghost striae in central area long, narrow slits.
Valve margin with continuous row of small shark tooth-shaped spines, poles without spines.
Valve with one rimoportula at pole.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Van de Vijver B., Williams D.M., Kelly M., Jarlman A., Wetzel C.E., Ector L. 2021. Analysis of some species resembling Fragilaria capucina (Fragilariaceae, Bacillariophyta). Fottea. 21(2): 128-151. | Morphology; Taxonomy; Description; Type Illustration |
This page should be cited as:
Van de Vijver B., Kelly M.G., Wetzel C.E., Ector L., Williams D.M., Jüttner I. Fragilaria ennerdalensis Van de Vijver, M.Kelly, C.E.Wetzel & Ector; 2021; 144. 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=4676. [Accessed:
].
Image Gallery
Record last modified: 15/12/2021