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LM image scalebar = 10 µm = pixels not measured
Observations
| Observations: | Bart Van de Vijver |
|---|---|
| Length: | 30-40µm |
| Width: | 10µm |
| Striae: | 11-12 striae in 10µm on the ARV; 13-15 striae in 10µm on the RV |
Description:
Valves linear with parallel, undulating margins and broadly rounded ends (L 30-40µm, W 10µm, 11-12 striae in 10µm on the ARV, 13-15 striae in 10µm on the RV). Axial area linear, quite distinct. Striae parallel in the middle, slightly radiate towards the ends, consisting of one row of rounded areolae. RV: axial area linear, central area broad, stauroform. Transapical striae radiate, convergent near the poles. Raphe filiform with expanded central endings and curved terminal fissures.
| Morphology: | Monoraphid |
|---|---|
| Distribution: |
Autecology:
Notes:
Pointe Basse, Ile de la Possession, Crozet Archipelago, Sample BA061 (coll. date 21/11/1999).Only found on one location, in the bare soil of a small shallow cave, located on the river edge, about 3 meter above water level. The diatom composition of the sample points to a more brackish environment.Described from Ile de la Possession and recently observed in some moss samples from Ile Heard (pers. observation).
Other sites with Achnanthes naviformis
- Ile de la Possession (moist habitats), Crozet Archipelago
Original Type Description
| Author: | Van de Vijver & Beyens |
|---|---|
| Length: | 30-40µm |
| Width: | 10µm |
| Striae: | 11-12 striae in 10µm on the ARV; 13-15 striae in 10µm on the RV |
Original Description:
Valves linear with parallel, undulating margins and broadly rounded ends (L 30-40µm, W 10µm, 11-12 striae in 10µm on the ARV, 13-15 striae in 10µm on the RV). Axial area linear, quite distinct. Striae parallel in the middle, slightly radiate towards the ends, consisting of one row of rounded areolae. RV: axial area linear, central area broad, stauroform. Transapical striae radiate, convergent near the poles. Raphe filiform with expanded central endings and curved terminal fissures.
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).
