 Though the growth rates of Saurolophus are poorly understood, a group of perinatal Saurolophus was recently discovered in an area of the Gobi Desert known as "The Dragon's Tomb". The animals uncovered had skull lengths less than five percent of the length of the skulls of the adults, indicating they were in the earliest developmental stage at the time of their deaths The discovery of Saurolophus neonates also indicates the distinct crest found in adults was poorly developed in infancy. It remains unknown if the animals were still within their eggs or if they had hatched before they died. The specimens were described in the journal PLOS ONE on October 14, 2015 by Leonard Dewaele et al.
