Tags: Green Alga.
Pandorina is a genus of green algae composed of 8 16 or sometimes 32 cells held together at their bases to form a sack globular colony surrounded by mucilage. The cells are ovoid or slightly narrowed at one end to appear keystone- or pear-shaped. Each cell has two flagella with two contractile vacuoles at their base an eyespot and a large cup-shaped chloroplast with at least one pyrenoid. The colonies coordinate their flagellar movement to create a rolling swimming motion.
