Boxplot showing the distribution of the length/width ratio of the ischial peduncle of the pubis for a sample
of iguanodontoidean ornithopods. 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 variable of this ratio were measured, exemplified in a pubis of an
indeterminate hadrosaurid (TMP 1966.27.24). Grey horizontal lines delimit character states.