AM 25406, found in the Dunlap Camel Quarry, Runningwater Formation, Dawes County, Nebraska Specimens assigned to this species have since been found at several sites in Nebraska and one site in Colorado.
AM 25406, found in the Dunlap Camel Quarry, Runningwater Formation, Dawes County, Nebraska R. M. Hunt. Bulletin of the American Museum of Natural History 279:77-115 Specimens assigned to this species have since been found at several sites in Nebraska and one site in Colorado.