Name:
Archemedes Screw Bryozoan
Age: Mississippian
Formation: Keokuk Formation
Location: Marion County, Missouri
Size: Screw is over 4 inches long
Here is a very distinct specimen of Archimedes sp. from Missouri. This unusual, corkscrew-shaped bryozoan is only found the Mississippian of North America! This bryozoan colony attached itself to the ocean floor with the spiraling fronds in an upward position. The coiling feature of this fossil is easily seen. The white fossil contrasts well with the orange matrix plate. This is a very fine example of this strange-looking bryozoan.
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