Radiolarian a. : Of or pertaining to the Radiolaria.

Radiolarian n. : One of the Radiolaria.

Example:
How do I make Radiolarians visible in Radiolarian chert? Do I need to dissolve the chert?

Taxonomy
Radiolaria, radiolarians, free encyclopedia, skeletons, Polycystinea, Acantharea, Cercozoa, illustration, fossils, protists, ocean bottom, species, icosahedra, Patricia, London, Fossil range, Eukaryota, Rhizaria.

Defination from the web:
Radiolarians, the amoeboid protozoa that produce intricate mineral skeletons.