Scenedesmus verrucosus (Roll, 1925)
Most likely ID: n.a.
Synonyms: Scenedesmus bijugatus v. granulatus, Scenedemus f. verrucosa, Scenedesmus ecornis v. granulatus, Scenedemus granulatus f. disciformis, Chlorella ultrasquamata
Sampling location: Simmelried
Phylogenetic tree: Scenedesmus verrucosus
Diagnosis:
- colonies 4-8 cells, in two rows
- no gaps between single cells
- single cells 5.4 – 14.4 µm long, 2-7 µm wide
- surface finely granulated
- one pyrenoid per cell
Probably cosmopolitan distribution. The cenobia of this species often disintegrate into single cells, which is why it has been described as Chlorella (see synonyms). The pyrenoid is sometimes indistinctly visible.
Fig. 1: Scenedesmus verrucosus. Two focal planes of an 8 cell colony. PY = pyrenoid. Obj. 100 X.