Sellaphora bisexualis D.G.Mann & K.M.Evans; 2009; 201
Key references
Mann D.G., Evans K.M., Chepurnov V.A., Nagai S. 2009. Morphology and formal description of Sellaphora bisexualis sp. nov. (Bacillariophyta). Fottea. 9(2): 199-209.
Morphology
Size
Length 20–55 µm, width 6.8–9.0 µm (UK and Australian populations, Mann et al. 2009)
Shape
Valves linear-elliptical with slightly rostrate poles except in the smallest valves.
Striae
Striae straight, apparently irregularly punctate, radiate, in smaller valves slightly radiate, near the poles parallel or slightly radiate, sometimes slightly curved, 18.5–21.5 in 10 µm.
Axial area
Narrow linear, straight.
Central area
Central area transversely rectangular to slightly bow-tie-shaped, 60–80% of valve width, bordered by irregular very short striae.
Raphe
Raphe slightly undulate, proximal raphe endings slightly bent towards the primary side both internally and externally, with more or less curved terminal fissures.
Other features
Polar bars parallel, sometimes slightly angled towards the pole.
Length 20–55 µm, width 6.8–9.0 µm (UK and Australian populations, Mann et al. 2009)
Shape
Valves linear-elliptical with slightly rostrate poles except in the smallest valves.
Striae
Striae straight, apparently irregularly punctate, radiate, in smaller valves slightly radiate, near the poles parallel or slightly radiate, sometimes slightly curved, 18.5–21.5 in 10 µm.
Axial area
Narrow linear, straight.
Central area
Central area transversely rectangular to slightly bow-tie-shaped, 60–80% of valve width, bordered by irregular very short striae.
Raphe
Raphe slightly undulate, proximal raphe endings slightly bent towards the primary side both internally and externally, with more or less curved terminal fissures.
Other features
Polar bars parallel, sometimes slightly angled towards the pole.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Mann D.G., Evans K.M., Chepurnov V.A., Nagai S. 2009. Morphology and formal description of Sellaphora bisexualis sp. nov. (Bacillariophyta). Fottea. 9(2): 199-209. | Morphology; Taxonomy; Description; Biology; Type Illustration; |
Similar Species
Similar species not published on this website:
This page should be cited as:
Mann D. G., K.M. Evans Sellaphora bisexualis D.G.Mann & K.M.Evans; 2009; 201. 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=4433. [Accessed:
].
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Record last modified: 27/12/2020