A 480-million-year-old parasite still infects oysters today

ScienceDaily
Nov 5, 2025, 7:52 am100 pts
Researchers discovered fossil evidence showing that spionid worms, parasites of modern oysters, were already infecting bivalves 480 million years ago. High-resolution scans revealed their distinctive question mark-shaped burrows. The finding highlights a parasitic behavior that has remained unchanged for nearly…

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