This diatom is similar in structure to Coscinodiscus granii, but differs in forming colonies in which rows of individual cells are joined together at regular intervals by threads of a substance called chitin. Like many diatoms that live in cold waters, the numbers of this species fluctuate greatly over the year. In spring, they multiply rapidly, in what is referred to as a bloom, to take advantage of the warmer, more favorable conditions. In fall, their numbers drop as the water temperature decreases.
- Group Diatoms
- Length 0.01–0.05 mm
- Habitat Cold water
- Distribution Northern Hemisphere