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Actinoptychus senarius is a species of diatoms in the family Heliopeltaceae. They are native to Rio De Janeiro, Espirito Santo, Pernambuco, Bahia, Pará, Paraná, ParaíBa, Santa Catarina, SãO Paulo, Rio Grande Do Norte, and Rio Grande Do Sul. Dead Actinoptychus senarius 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 17 attributes, including: