Polycystine

The polycystines are a group of radiolarians. They include the vast majority of the fossil radiolaria, as their skeletons are abundant in marine sediments, making them one of the most common groups of microfossils. These skeletons are composed of opaline silica. In some it takes the form of relatively simple spicules, but in others it forms more elaborate lattices, such as concentric spheres with radial spines or sequences of conical chambers. Two of the orders belonging to this group are the radially-symmetrical Spumellaria, dating back to the late Cambrian period, and the bilaterally-symmetrical Nasselaria, whose origin is placed within the lower Devonian.^{[2] [3]}

• Wikispecies logo Data related to Polycystinea at Wikispecies
• "Systematics of the Radiolaria".
• Radiolaria.org
• "Polycystine radiolarians". Archived from the original on 2024年05月09日.
• Polycystine Radiolarians from the water column and the surface sediments of the World Ocean

• Taxa named by Christian Gottfried Ehrenberg
• Polycystines
• Radiolarian stubs

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