Tholoniidae is a family of radiolarians in the order
Spumellaria
Spumellaria is an order of radiolarians in the class Polycystinea. They are ameboid protists appearing in abundance in the world's oceans, possessing a radially-symmetrical silica (opal) skeleton that has ensured their preservation in fossil re ...
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References
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Polycystines
Radiolarian families
{{Radiolarian-stub