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DIVISION
CLASS
ORDER
Chlorellales
FAMILY
Chlorellaceae
GENUS
SPECIES
Actinastrum , Lagerheim , 1882
IMAGES
Morphological Characteristics

The coenobium is of 4 or 8 cells, but has also been reported to 2 or 16 cells, rarely solitary. Cells are much longer than broad, cylindrical, spindle, cone- shaped, or elongated with rounded ends, usually straight or slightly curved at the ends, radiating from a common centre, connected only at base.The chloroplast parietal with one usually invisible pyrenoid; cell wall fine, smooth.

 

 

Morphological Data
Distinctive morphometric characters
  • Cell Length: from 7 to 40 µm
  • Cell Width: from 1 to 8 µm
Distribution

Planktonic or overgrown in eutrophic fresh, brackishwater ponds, lakes, ditches, bogs. Cosmopolitan distribution, except in arctic and subarctic regions.

 
Notes

Toxicity:

Not reported.

Resistence Stages:

Not reported.

References

Das Phytoplankton des Susswassers: Systematik und Biologie 7.T., Halfte. Chlorophyceae (Grunalgen), Ordnung: Chlorococcales / von J. Komarek, B. Fott., Stuttgart : E. Schweizerbart'sche Verlagsbuchhandlung, Huber-Pestalozzi G., 1983, 1044

Checklist of Baltic Sea Phytoplankton Species. Baltic Sea Environment Proceedings No. 95, Helsinki Commission Baltic Marine Environment Protection Commission, Hällfors G., 2004,

Biovolumes and size-classes of phytoplankton in the Baltic Sea, HELCOM Balt.Sea Environ. Proc. No. 106, Olenina I., Hajdu S., Edler L., Andersson A., Wasmund N., Busch S., Göbel J., Gromisz S., Huseby S., Huttunen M., Jaanus A., Kokkonen P., Ledaine I. and Niemkiewicz E., 2006, 1-144

SHAPE
Shape Type
complex
Shape Unit
Coenobium
Cod:
17 - Cylinder + 2 Cones
Surface Area
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Volume
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