500-Million-Year-Old Parasite Still Threatens Shellfish
A recent study has made a surprising discovery about a common parasite of modern oysters, revealing that it began infecting bivalves hundreds of millions of years before the dinosaurs became extinct.
Researchers used high-resolution 3D scans to examine 480-million-year-old shells from a Moroccan site, known for its exceptionally well-preserved sea life. The scans revealed distinctive patterns etched on the surface and inside the fossils.
The marks weren’t random scratches. We saw seven or eight of these perfect question mark shapes on each shell fossil. That’s a pattern.
According to the study, published in iScience, rare fossils show that the worms survived multiple mass extinction events.
Author's summary: Ancient parasite threatens shellfish.
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