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Observations
| Observations: | Bart Van de Vijver |
|---|---|
| Length: | 13-20µm |
| Width: | 2-3µm |
| Striae: | 20-24 striae in 10µm |
Description:
Valves rhombic-lanceolate with protracted, broadly rounded ends, sometimes even slightly subcapitate (L 13-20µm, W 2-3µm, 20-24 striae in 10µm). Axial area moderately broad, widening towards the central area. Central area large, rhombic with a typical fascia. Raphe filiform with straight (!) central endings and small but distinct pores. Terminal fissures quite distinct. Transapical striae moderately radiate in the middle, more convergent near the apices. Central area can be bordered by shortened striae but this is not always the case.
| Morphology: | Naviculoid |
|---|---|
| Distribution: |
Autecology:
Notes:
Fairly common in larger acid lakes but also in small, slightly acid pools with low specific conductance values. Also present in terrestrial mosses and relatively wet (50-75%) acid soils. Nutrient values always low.Due to confusion with P. silvatica unclear.Usually identified on Ile de la Possession as P. silvatica Petersen. The valves found on the island show affinities to perirrorata and are identified now likewise. However, there are still some differences, e.g. the central raphe endings are different and do not show the typical curving. The dimensions (length, width and number of striae in 10µm) are also a lot smaller than the original description in Krammer (2000).
Other sites with Pinnularia aff. perirrorata
- Ile de la Possession (moist habitats), Crozet Archipelago
Original Type Description
| Author: | Krammer 2000 |
|---|---|
| Length: | |
| Width: | |
| Striae: |
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).
