Introduction & Morphology

Geological Application

Distribution in Space & Time






  • Chitin - a polysaccharide, the principal constituent of shells of arthropods and shards of beetles, and found in certain fungi

  • Cytoplasm - the protoplasm of a cell surrounding the nucleus

  • Polycystina - a superorder of radiolaria, named after there "two tier" skeleton comprised of inner and outer shells

  • Radiolarians - are single celled organisms distinguished by their intricate exoskeletons

  • Silica - is a chemical compound comprised of silicon and two oxygen atoms (SiO2)

  • Spicule - is a spine like feature of the test, formed by the fusion of inner siliceous bars and beams

  • Test - is the outermost shell of radiolarians