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The primary classification of algae is based upon cellular, not organismal properties: the chemical nature of the wall, if present; the organic reserve materials produced by the Cell; the nature of the photosynthetic pigments; and the nature and arrangement of the flagella borne by motile Cells. In terms of these characters, the algae are arranged in a series of divisions, summarized in Table 26.1.
 
The primary classification of algae is based upon cellular, not organismal properties: the chemical nature of the wall, if present; the organic reserve materials produced by the Cell; the nature of the photosynthetic pigments; and the nature and arrangement of the flagella borne by motile Cells. In terms of these characters, the algae are arranged in a series of divisions, summarized in Table 26.1.
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TABLE 26.1 Major Groups of Algae:  These are characterized by i) the Pigment System ( chlorophylls or other special pigments), ii) the composition of the Cell wall, or iii) the nature of reserve materials;
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TABLE 26.1 Major Groups of Algae:  These are characterized by i) the Pigment System ( chlorophylls or other special pigments), ii) the composition of the Cell wall, or iii) the nature of reserve materials; and they have the following Group Names - Green algae: division Chlorophyta - Euglenids: division Euglenophyta - Dinoflagellates and related forms: division Pyrrophyta - Chrysophytes and diatoms: division Chrysophyta - Brown algae: division Phaeophyta - and Red algae: division Rhodophyta.
 
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and they have the following Group Names: Green algae: division Chlorophyta - Euglenids: division Euglenophyta - Dinoflagellates and related forms: division Pyrrophyta - Chrysophytes and diatoms: division Chrysophyta - Brown algae: division Phaeophyta - and Red algae: division Rhodophyta.
       
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