A genus of small marine animals, acorn worms, that are hemichordates characterized by a disc-like or head-like anterior structure.
From Greek 'kephale' (head) + 'diskos' (disc). Named for the distinctive disc-shaped anterior region.
Cephalodiscus lives in tiny tubes on the ocean floor and feeds using a proboscis—it's been doing this for hundreds of millions of years without major changes, making it one of evolution's most successful conservative designs.
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