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'''The Group Names''' are: 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.
 
'''The Group Names''' are: 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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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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The main distinctions are based upon the Pigment systems - the inclusion or not of three chlorophylls, special carotenoids and phycobilins; the composition of the Cell wall, or iii) the nature of reserve materials;
     
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