Exquisitely Preserved Mazon Creek Crustacean Acanthotelson

Name: Class: Crustacea; Order: Syncarida; Acanthotelson stimpsoni

Geological Time: Pennsylvanian (~300 m.y.a.)

Size (25.4mm=1 inch): 23 mm long; Matrix: 45 mm by 40 mm and 43 mm by 35 mm matrix pair

Fossil Site: Mazon Creek Pit 11, Francis Creek shale, Braidwood, Illinois

Code: CB77

Price: $85.00 - sold

Description: The Mazon Creek deposits of the region near Braidwood, Illinois rival the other famous Lagerstatten of the Burgess Shale, Solnhofen, and Liaoning for the variety of detailed life preserved. Many exquisitely preserved specimens are found in the ironstone nodules that make up the deposits. The majority of collecting areas are the spoil heaps of abandoned coal mines, the most famous of which is Peabody Coal Pit 11. Pit 11 now serves as a cooling pond for the Braidwood nuclear power plant, but with over 100 other localities, specimens still come to light.

This specimen is of a genus that had a well-sclerotized cuticle, making for fine preservation with distinct segmental rings.

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