Characteristics shared with other Heterokontophyta 1. The chloroplast DNA is organized into a ring-shaped nucleoid.
Diatoms are marine or freshwater unicellular or colonial algae .
Some diatom experts, such as Frank Round et al. They think the distinctiveness outweighs the similarities with other classes of Heterokontophyta. Round et al. Local notes There are numerous species in our local freshwaters and marine waters. Several large centrics form long chains on tropical reefs, especially in deeper parts of farmer fish territories.