Boxplot showing the distribution of the angle of inclination of the dentary coronoid process 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 a dentary
of Prosaurolophus maximus (CMN 8894). Grey horizontal lines delimit character states.