On the basis of photosynthetic pigments algae classified into three classes. Smith: Freshwater Algae of the United States; McGraw-Hill, New York (1950), with its coverage of a broad geographic region, as well as regional works such as G.W. Algae are usually green, but they can be found in a variety of different colours. It has been over 50 years since the last edition (1950) of Smith's "Freshwater Algae of the United States" and much has changed in our knowledge of the classification of the "Algae". Chlorophyceae (green algae) Phaeophyceae (brown algae) Rhodophyceae (red algae). Smith, Gilbert 1950 Inheritance of sexuality in Chlamydomonas reinhardi. He classified spore producing plants into various divisions. For instance, algae living in snow contain carotenoid pigments in addition to chlorophyll, hence giving the surrounding snow a distinctive red hue. SMITH G.M. It is the largest class of algae; CLASSIFICATION OF ALGAE. Their photosynthetic pigments are more varied than those of plants, and their cells have features not found among plants … Algae, singular alga, members of a group of predominantly aquatic photosynthetic organisms of the kingdom Protista.Algae have many types of life cycles, and they range in size from microscopic Micromonas species to giant kelps that reach 60 metres (200 feet) in length. The biological classification system of life introduced by British zoologist Thomas Cavalier-Smith involves systematic arrangements of all life forms on earth. o cell wall composition and structure. Smith, Gilbert M. 1951 The classification of algae. classification of algae was given by F.E Fritsch (1935) in his book ‘The Structure and Reproduction of the Algae’. He did not use the term algae. There is three main Algae classification: Chlorophyceae – These are called green algae, due to the presence of pigments chlorophyll a and b. Algae Classification. Sexuality in Chlamydomonas 1948 Science (New York, N.Y.) SMITH … PNAS, v.36 #4 pp.246-248. Following and improving the classification systems introduced by Carl Linnaeus, Ernst Haeckel, Robert Whittaker, and Carl Woese, Cavalier-Smith's classification attempts to incorporate the latest developments in taxonomy. Smith proposed the classification of algae taking into consideration the evolutionary principles proposed by Fascher (1914). Examples are Chlamydomonas, Spirogyra, and Chara; Phaeophyceae – Also called as brown algae, they are predominantly marine. o the presence or absence of flagella (as well as the number and Until now, microscopists have relied on the still useful monograph by G.M. Manual of Phycology--an instroduction to the algae and their biology 27:13-19. The account of algae dates back to ancient Chinese literature and it is a believe that along with the origin of plant sciences, the recognition of algae as a group has taken place. 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