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Bacillariophycidae is a subclass of diatoms. There are 2769 species of Bacillariophycidae, in 240 genera and 34 families. This subclass has been around since the neogenen period. It includes groups like Entomoneidaceae. Dead Bacillariophycidae form siliceous oozes.

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  • URI: http://purl.obolibrary.org/obo/ENVO_02000044
  • Definition: Siliceous ooze is a marine sediment composed of the debris of plankton with silica shells, such as diatoms and radiolaria. This ooze is limited to areas with high biological productivity, such as the polar oceans, and upwelling zones near the equator. The least common type of sediment, it covers only 15% of the ocean floor. It accumulates at a slower rate than calcareous ooze: 0.2-1 cm / 1000 yr.
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EOL has data for 7 attributes, including: