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LM image scalebar = 10 µm = pixels not measured
Observations
| Observations: | Bart Van de Vijver |
|---|---|
| Length: | 33-75µm |
| Width: | 3,6-5,3µm |
| Striae: | 19-22 striae in 10µm |
Description:
Valves linear to linear-elliptical with more or less capitate ends (L 33-75µm, W 3,6-5,3µm, 19-22 striae in 10µm). Striation pattern parallel in the middle, slightly radiate near the valve ends with thickened transapical ribs irregularly placed between the striae. Axial area narrow or almost absent. Width of valve end always larger than width near the valve middle. One or two rows of marginal spines can be observed. One rimoportula and two apical porefields present . Girdle structure with variable number of open bands.
| Morphology: | Araphid |
|---|---|
| Distribution: |
Autecology:
Notes:
Common on the entire island, mostly in rivers and small ponds with pH-optimum 7,1. Overall present in mosses (optimal F-value between III and IV). Less abundant in soil samples.Crozet (Pierre 1977 : reported as Diatoma vulgare var. ehrenbergii), South Georgia (Van de Vijver & Beyens 1996, 1997a), Kerguelen (Reichardt & Lange-Bertalot 1990, Le Cohu 1999, Van de Vijver et al. 1998a).Williams (1990) described, based on Fragilaria incognita, a new genus, Distrionella. Both F. germainii and F. husvikensis show some features of this genus. In Van de Vijver et al. (2000), the rationale why they are not placed within this genus is explained. Detailed analysis of the girdle structure is given in Le Cohu (1999).
Other sites with Fragilaria germainii
- Ile de la Possession (moist habitats), Crozet Archipelago
Original Type Description
| Author: | Reichardt & Lange-Bertalot 1990 |
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| Length: | |
| Width: | |
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Original Description:
New combination
| Author: |
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Citations
Index Nominum Algarum (INA):
- Original
- If an INA link is available, it will be shown above
- The INA is a bibliographic reference "card file" for algal taxonomy, containing nearly 200,000 names of algae (in the broad sense).
