Cylindrocystis brebissonii
(Ralfs) De Bary, 1858
Most likely ID: n.a.
Synonym: n.a.
Sampling location: Sima Moor (Austria), Simmelried
Phylogenetic tree: Cylindrocystis brebissonii
Diagnosis:
- cells cylindrical with rounded apices, sometimes slightly curved
- lateral sides straight and parallel
- length 35–80 µm long
- two stellate chloroplasts with each one pyrenoid
- pyrenoids spherical or elongated
- ridges of chloroplasts longitudinally
- acidophile
Cylindrocystis brebissonii is an extremely common algae, but it is bound to acidic locations. It is therefore very common in bog waters. In the Simmelried I only find it in the bank zones and puddles with Sphagnum growth.
The cell wall of Cylindrocystis brebissonii is smooth. The fine dotting that can be seen in the images below is caused by the pore apparatus in the cell wall, which is responsible for the secretion of mucus. I have described elsewhere how the pore apparatuses can be easily stained and visualized (s. Micrasterias rotata).
Fig. 1 a-c: Cylindrocystis brebissonii. L = 65 µm. Three focal planes of a specimen found in June 2024 in the Sima Moor. Nu = nucleus. Obj. 100 X.
Fig. 2 a-c: Cylindrocystis brebissonii. L = 65 µm. Three focal planes of a second specimen from the Sima Moor. OD = oil droplets, PY = pyrenoid. Obj. 100 X.
Fig. 3 a-c: Cylindrocystis brebissonii. L = 65 µm. The same specimen as shown in fig. 2 a-c in brightfield illumination. Obj. 100 X.