Images
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LM image scalebar = 10 µm = pixels not measured
Observations
| Observations: | Bart Van de Vijver |
|---|---|
| Length: | 19-24µm |
| Width: | 7-8µm |
| Striae: | 24-26 striae in 10µm |
Description:
Valves elliptic-lanceolate with sharp, slightly constricted ends (L 19-24µm, W 7 8µm, 24-26 striae in 10µm). Striae uniseriate with round areolae, strongly radiate near the central area, slightly radiate towards the poles. Axial area narrow, central area large forming an asymmetrical stauros. Striae (6-7) at one side in central area shorter, more spaced, lacking (or present in only highly reduced form) at the other side. Raphe filiform with central endings expanded, pore-like. Terminal fissures straight.
| Morphology: | Naviculoid |
|---|---|
| Distribution: |
Autecology:
Notes:
C. heterostauron is not common on Ile de la Possession. Most of the valves were found in relatively dry soils (moisture 35-50%) with slightly acid pH (6,1). In mosses and freshwater waterbodies, only a few valves were found.Kerguelen (Germain 1937, Bourrelly & Manguin 1954, Le Cohu & Maillard 1986).Cavinula lapidosa shows a similar valve outline but lacks the asymmetrical stauros and has more curved terminal raphe fissures. Therefore we suggest to keep C. heterostauron as a separate taxon.
Other sites with Cavinula heterostauron
- Ile de la Possession (moist habitats), Crozet Archipelago
Original Type Description
| Author: | Germain 1937 |
|---|---|
| Length: | |
| Width: | |
| Striae: |
Original Description:
New combination
| Author: | Van de Vijver |
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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).
