Lucas, Spencer G., Lerner, Allan J., DiMichele, William A., Cantrell, Amanda K., Suazo, Thomas L., and Chaney, Dan S. 2014. "Xiphosurid fossils from the Pennsylvanian Beeman formation, Otero County, New Mexico." In New Mexico Geological Society Guidebook, 65th Field Conference, Geology of the Sacramento Mountains Region. 311–314. Socorro, NM: New Mexico Geological Society, Inc..