- A division of Radiolaria including numerous minute marine types. The skeleton is composed of silica, and it is often really elegant in form and sculpture. Numerous were found in the fossil state.
- Ehrenberg's name (written by him into the kind polycistina) of all those radiolarians of proven to him: loosely similar to Radiolaria.
Sentence for "polycystina"
- a step higher to the _polycystina_,…
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