Species: *Dolichometopus productus* Collected from the Bright Angel Shale in Grand Canyon National Park: https://www.nps.gov/articles/trilobite.htm This fossil is in the collections at Grand Canyon National Park, Arizona. Learn about paleontology in the National Park Service: https://www.nps.gov/subjects/fossils/index.htm Learn more about Grand Canyon National Park’s Centennial: https://www.nps.gov/grca/getinvolved/centennial.htm