Bacillariophyta (Diatoms) is a phylum of heterokont. There are 7129 species of Diatoms, in 547 genera and 92 families. It includes groups like Mediophyceae, Coscinodiscophyceae, and Fragilariophyceae. Dead Diatoms form siliceous oozes.
EOL has data for 20 attributes, including: