Species: *Tainoceras schellbachi*
Collected from the Kaibab Limestone in Grand Canyon National Park. Holotype specimen.
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