Why are desmids called golden algae?
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Golden Algae belongs to Phylum Chlorophyta Unicellular Form that displays a secreted skeletal structure made of silica. Outer wall is called epitheca and inner wall is called hypotheca.
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Desmids are called golden algae or golden-brown algae because they have a characteristic golden colour imparted by a pigment fucoxanthin and by the use of oil droplets which serve as food reserves.
Many of these algae are also encased in a silica cyst ornamentation known as statocyst or statospore. This class of algae comprise about 33 different genera and 1200 different species. They are usually found in fresh and marine waters.
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