Archimedes is a genus of the phylum Bryzoa and was named after Archimedes’ screw which acted as a water pump and resembles the fossil.  Archimedes was relatively common in the Upper Mississippian marine rocks of North America. Usually, when fossil hunters encounter it, they do not recognize it, for the remains are usually fragments of the fossil, making it difficult to discern.

File:Fenestellidae - Archimedes species.JPG

By Hectonichus (Own work) [CC BY-SA 3.0 ( or GFDL (], via Wikimedia Commons

Kingdom: Animalia

Phylum: Bryzoa

Class: Stenolaemata

Order: Fenestrida

Family: Fenestellidae

Works Cited

Mckinney, Frank K., and Dennis W. Burdick. “A Rare, Larval-founded Colony of the Bryozoan Archimedes from the Carboniferous of Alabama.” Palaeontology 44.5 (2001): 855-59. Web.