Largest known heliozoan

What to remember

The cell body of Berkeleyaesol magnus measures 1,486 μm across, wrapped in a mucilaginous envelope 540 μm thick. Around it, its axopodia can reach 1,892 μm in length. Together they form an axopodial sphere up to 6,350 μm, or 6.35 mm, in diameter.

As of 2021, it was the largest known heliozoan. The species was formerly known as Raphidiophrys magna.

The record measures the sphere outlined by the axopodia, not the cell body alone, which is much smaller.