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• Unconspicous freshwater algae with some celebrities
• Metacentric spindles: centrioles not at nuclear poles but at the side of the spindle
• Appearance from unflagellated, coccoid cells to filaments and bladelike thalli
• Chlorella: 2-12 µm, coccoid cells; known as phycobiont (endosymbiont) in freshwater animals; used as model by Melvin Calvin to investigate carbon fixation in plants (Calvin cycle); recent research in Chlorella phytoviruses
  
• Prototheca: colorless soil algae, plastids can be stained by iodine; pathogene of animals and humans
• Trebouxia is the major chlorophyte symbiont in lichens
• Stichococcus: 2-3 µm rod-shaped cells, lichen symbiont
• Golenkinia: Chlorella-like cells with long spines; asexual reproduction by 2-8 autospores, sexual reproduction by oogamy
• Prasiola: single-layered blades, 1.5 cm, attached to rocks, predominantly in Antarctica