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LM image scalebar = 10 µm =
Observations
| Observations: | Bart Van de Vijver |
|---|---|
| Length: | 150-200µm |
| Width: | 19-25µm |
| Striae: | 6-7 striae in 10µm |
Description:
Valves linear to linear-lanceolate with parallel margins and slightly cuneiform ends (L 150-200µm, W 19-25µm, L/W ratio ±7,8). Axial area linear-lanceolate, moderately narrow (1/4-1/5 of valve width). Central area rhomboid with an asymmetrical fascia. Raphe straight, slightly lateral. Central pores laterally deflected, teardrop-like. Terminal fissures viridis-like. Transapical striae moderately radiate in the middle, parallel to convergent near the poles, 6-7 in 10µm. A narrow longitudinal band is present.
| Morphology: | Naviculoid |
|---|---|
| Distribution: |
Autecology:
Notes:
Ruisseau de la Pompe, Ile de la Possession, Crozet Archipelago, Sample BM037 (coll. date 10/12/1997).Only found in one moss sample, submerged in a small pool with a pH value of 7,5 and a specific conductance of 95µS/cm.So far only found on Ile de la Possession.P. extralonga differs from all other large Pinnularia-taxa by the combination of size, fascia and raphe structure. The name in intended to stress the large size of this taxon since on the Subantarctic Islands, the general habitus of the diatom flora is much smaller.
Other sites with Pinnularia extralonga
- Ile de la Possession (moist habitats), Crozet Archipelago
Original Type Description
| Author: | Van de Vijver, Beyens & Le Cohu |
|---|---|
| Length: | 150-200µm |
| Width: | 19-25µm |
| Striae: | 6-7 striae in 10µm |
Original Description:
Valves linear to linear-lanceolate with parallel margins and slightly cuneiform ends (L 150-200µm, W 19-25µm, L/W ratio ±7,8). Axial area linear-lanceolate, moderately narrow (1/4-1/5 of valve width). Central area rhomboid with an asymmetrical fascia. Raphe straight, slightly lateral. Central pores laterally deflected, teardrop-like. Terminal fissures viridis-like. Transapical striae moderately radiate in the middle, parallel to convergent near the poles, 6-7 in 10µm. A narrow longitudinal band is present.
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).
