Ancient Artifacts & Antiquities

Astreptoscolex (Worm) Fossil from the Mazon Creek Site in Illinois

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Start price: $10

Estimated price: $10 - $10,000

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The Astreptoscolex fossil from the Mazon Creek site is a rare polychaete worm (Astreptoscolex anasillosus) preserved in ironstone nodules from the Pennsylvanian (Carboniferous) period, about 307–309 million years ago. It’s part of the famous Mazon Creek Lagerstätte in Illinois, known for its exceptional preservation of soft bodied organisms. Measures 1 1/2". Both sides of the stone nodule that hold the fossil. Ex Field Museum of Natural History in Chicago. "HA" stands for the Hoard Anderson collection, one of the largest private collections of Mazon Creek fossils that was donated to the museum. Hoard donated his collection in 1978. At some point since then the Museum deaccessioned much of his collection to raise money for museum projects.

Condition: Authentic