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Photo of Pygurus fossil

Pygurus

Sand dollars are a type of sea urchin that bury themselves in the sand. Once dead their shells, or tests, are fragile and usually broken up. Being already buried gives them a slightly better chance of being fossilised, though, and where found the site can be very rich in material.

These Pygurus marmonti are from Jurassic deposits in Sakaraha, Madagascar.

6-8cm



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