Radiolaria
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The Radiolaria, also called Radiozoa and informally called radiolarians, are unicellular eukaryotes of diameter 0.1–0.2 mm that produce intricate mineral skeletons, typically with a central capsule di
Radiolaria
Anthocyrtium hispidum Haeckel
Like diatoms, radiolarians come in many shapes
Also like diatoms, radiolarian shells are usually made of silicate
Acantharia
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The Acantharia are a group of radiolarian protozoa, distinguished mainly by their strontium sulfate skeletons. Acantharians are heterotrophic marine microplankton that range in size from about 200 mic
Radiolaria
…together with (amoeboid or flagellate) Cercozoa and (shelled amoeboid) Foraminifera. Traditionally the radiolarians have been divided into four groups—Acantharea, Nassellaria, Spumellaria and Phaeodarea. Phaeodaria is however now considered to be a cercozoan. Nassellaria and Spumellaria both produce siliceous…
Haeckel Acanthometra
Celestine crystal