John Dolan   cc-by-sa-3.0

Sphaenacanthida is a suborder of radiolarians. There are 77 species of Sphaenacanthida, in 22 genera and 5 families. It includes groups like Dorataspidae, Hexalaspidae, and Lithopteridae. Dead Sphaenacanthida 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 5 attributes, including:

Known occurrences, collected specimens and observations of Sphaenacanthida. View this species on GBIF