Images
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LM image scalebar = 10 µm = pixels not measured
Observations
| Observations: | Bart Van de Vijver |
|---|---|
| Length: | 6,5-18µm |
| Width: | 3,5-5µm |
| Striae: | 28-32 striae in 10µm |
Description:
Valves linear to elliptical in smaller forms (cf. var. elliptica), slightly swollen in the median part with rounded apices (L 6,5-18µm, W 3,5-5µm, 28-32 striae in 10µm). Striae radiate, the median striae often more spaced. RV: raphe filiform with central terminals slightly curved into opposite directions, central area rectangular to irregular, most of the times bordered by two very short striae. ARV: axial area lanceolate, slightly enlarged in an irregular central area.
| Morphology: | Monoraphid |
|---|---|
| Distribution: |
Autecology:
Notes:
Quite common in larger, slightly acid (pH ±6,5) lakes and pools with low specific conductance values, where it can dominate the entire diatom flora. Also present, though in lower abundances in wet mosses (mean F-value 4,2±1,4) and soils.Kerguelen (Bourrelly & Manguin 1954, Larson 1974, Le Cohu & Maillard 1983, Van de Vijver et al. 1998a, 2001) South Orkney Islands (Oppenheim & Ellis-Evans 1989, Oppenheim & Greenwood 1990, Oppenheim 1990, 1994), Macquarie Island (McBride et al. 1999).In Schmidt et al. (1990) Achnanthes abundans is made a synonym of Achnanthes mollis based on the form of the central area of the araphid valve. However, A. mollis presents a regular central area in contrast with A. abundans where an irregular central area can be observed in both the araphid and raphid valves. The extra two short striae in the central area of A. abundans have never been observed with A. mollis where the central area extends entirely towards the valve margins. Therefore, A. abundans can not be considered as a synonym of A. mollis.
Other sites with Psammothidium abundans
- Ile de la Possession (moist habitats), Crozet Archipelago
Original Type Description
| Author: | Manguin |
|---|---|
| Length: | |
| Width: | |
| Striae: |
Original Description:
New combination
| Author: | Bukhtiyarova & Round 1954 |
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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).
