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An example of Chlorophyceae genus Pediastrum.. The Chlorophyceae are a class of green algae, distinguished mainly on the basis of ultrastructural morphology.They are usually green due to the dominance of pigments chlorophyll a and chlorophyll b.
Depending on the species, Chlorophyceae can grow unicellular (e.g. Chlamydomonas), colonial (e.g. Volvox), filamentous (e.g. Ulothrix), or multicellular. [example needed] They are usually green due to the presence of chlorophyll a and chlorophyll b; they can also contain the pigment beta-carotene.
Chlorophytes are eukaryotic organisms composed of cells with a variety of coverings or walls, and usually a single green chloroplast in each cell. [4] They are structurally diverse: most groups of chlorophytes are unicellular, such as the earliest-diverging prasinophytes, but in two major classes (Chlorophyceae and Ulvophyceae) there is an evolutionary trend toward various types of complex ...
Green algae Green algal diversity. From top left corner: Picocystis (Picocystophyceae), Acetabularia (Ulvophyceae), Botryococcus (Trebouxiophyceae), Volvox (Chlorophyceae), Klebsormidium (Klebsormidiophyceae), Chara (Charophyceae), Spirogyra and Micrasterias (Zygnematophyceae)
Volvox is a polyphyletic genus of chlorophyte green algae in the family Volvocaceae. Volvox species form spherical colonies of up to 50,000 cells, and for this reason they are sometimes called globe algae.
All Chlamydomonas are motile, unicellular organisms. Cells are generally spherical to cylindrical in shape, but may be elongately spindle-shaped, [9] and a papilla may be present or absent.
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Planktosphaeria is a genus of Chlorophyceae of the green algae. [1] It was first described by the phycologist Gilbert Morgan Smith in 1918, with Planktosphaeria gelatinosa as its type species . Species of Planktosphaeria are commonly found in freshwater plankton around the world.