Above is an image of a prone trilobite fossil called Arctinurus boltoni (Bigsby, 1825). A trilobite fossil like this is found in the Silurian Period Rochester Shale. It was found Middleport, New York, USA. The fossil was on display in the Evolving Planet section of the Field Museum of Natural History in Chicago Illinois, USA as of August 2020. Accession number is PE60823.
