How Many Diatoms Are There?

How Many Diatoms Are There? No one really knows how many different diatoms are out there, but conservative estimates suggest around 100,000 to 200,000 species, making them among the most species-rich lineages of eukaryotes. How many species of diatoms are there? Estimations of the numbers of diatom species vary widely, from a low of 1,800