Sellaphora pupula (Kützing) Mereschkowsky; 1902; 187
Synonymy
Navicula pupula Kützing 1844
Key references
Mann D.G., McDonald S. M., Bayer M.M., Droop S.J.M., Chepurnov V.A., Loke R.E., Ciobanu A., Du Buf J.M.H. 2004. The Sellaphora pupula species complex (Bacillariophyceae): morphometric analysis, ultrastructure and mating data provide vidence for five new species. Phycologia. 43(4): 459-482.
Morphology
Size
Length 18.5-35 µm, width 6.7-7.4 µm, ratio pole width/maximum width 1:1.5-1:1.9 (populations from UK and Germany, Mann et al. 2004).
Shape
Valves narrowly elliptical with rostrate ends.
Symmetry
Isopolar, bilaterally symmetrical.
Striae
Radiate in the central part of the valve, becoming parallel or slightly convergent near the poles, 21.3-25.6 in 10 µm (populations from UK and Germany, Mann et al. 2004).
Axial area
Narrow linear, straight.
Central area
Rectangualr or slightly bow-tie-shaped subfascia, outline somewhat irregular, bordered by alternate long and short striae.
Raphe
Simple, straight, threadlike, central raphe endings expanded externally, deflected towards primary side, internally also deflected towards primary side, terminal fissures curve smoothly towards secondary side.
Other features
Polar bars appear perpendicular to the apical axis or a little reflexed; the absence of ghost striae and shape of central area separate S. pupula from S. auldreekie and S. lanceolata.
Length 18.5-35 µm, width 6.7-7.4 µm, ratio pole width/maximum width 1:1.5-1:1.9 (populations from UK and Germany, Mann et al. 2004).
Shape
Valves narrowly elliptical with rostrate ends.
Symmetry
Isopolar, bilaterally symmetrical.
Striae
Radiate in the central part of the valve, becoming parallel or slightly convergent near the poles, 21.3-25.6 in 10 µm (populations from UK and Germany, Mann et al. 2004).
Axial area
Narrow linear, straight.
Central area
Rectangualr or slightly bow-tie-shaped subfascia, outline somewhat irregular, bordered by alternate long and short striae.
Raphe
Simple, straight, threadlike, central raphe endings expanded externally, deflected towards primary side, internally also deflected towards primary side, terminal fissures curve smoothly towards secondary side.
Other features
Polar bars appear perpendicular to the apical axis or a little reflexed; the absence of ghost striae and shape of central area separate S. pupula from S. auldreekie and S. lanceolata.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Kützing F.T. 1844. Die Kieselschaligen Bacillarien oder Diatomeen. Fr. Fritsch, Nordhausen. 152 pp; 30 pls | Morphology; Description; Illustrations |
| Mereschkowsky C. 1902. On Sellaphora, a new genus of Diatoms. Annals and Magazine of Natural History, series 7, 9. 185-195; pl. IV. | Morphology; Taxonomy |
| Mann D.G. 1989. The Diatom Genus Sellaphora: Separation from Navicula. British Phycological Journal. 24: 1-20. | Morphology; Biology; Illustrations |
| Mann D.G., McDonald S. M., Bayer M.M., Droop S.J.M., Chepurnov V.A., Loke R.E., Ciobanu A., Du Buf J.M.H. 2004. The Sellaphora pupula species complex (Bacillariophyceae): morphometric analysis, ultrastructure and mating data provide vidence for five new species. Phycologia. 43(4): 459-482. | Morphology; Biology; Type Illustration; |
Similar Species
Similar species not published on this website:
This page should be cited as:
Mann D. G. Sellaphora pupula (Kützing) Mereschkowsky; 1902; 187. 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=2985. [Accessed:
].
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Record last modified: 27/12/2020