Boxplot showing the distribution of the degree of lingual projection of the symphyseal end of the dentary
for a sample of iguanodontoidean taxa. The inserted smaller graph shows the Bayesian information criterion (BIC) for various numbers of clusters in which the data can be classified. The photograph shows how the two variables for this character were measured, exemplified in an indeterminate lambeosaurine dentary (? Lambeosaurus, UALVP 11734).