Lee Kong Chian Natural History Museum

Micrasteria sp. Agardh, 1827

Kingdom:Plantae
Phylum/Division:Chlorophyta
Class:Zygnematophyceae
Order:Zygnematales
Family:Desmidiaceae
Genus:Micrasteria
Common Names:Desmid
Status:Common

Description

All members are unicellular except for a filamentous species. Generally, the cells have lengths somewhat greater then the breadths. The cells are bilaterally symmetrical and strongly compressed. The median constriction is always deep and mostly linear to sublinear. The front outline of the semicells are semicircular to hexagonal. The cell walls are generally smooth although some species have rows of marginal spines or spines all over the wall. The semicell has a single, massive, plate-like, axial chloroplast with numerous pyrenoids.

Read more about the Zygnematales order.
Read more about the Desmidiaceae family.

Locality Map

General Biology

These desmids occur in the freshwater plankton. There is a wide range of shapes depending on the species.

Life Cycle

Conjugation between adult cells results in a zygote that germinate to give daughter cells.

References

Bold, H. C., C. J. Alexopoulos & T. Delevoryas, 1987. Morphology of plants and fungi. Harper & Row, New York. (5th ed.). 912pp.

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