Boxplot showing the distribution of the ratio between the length of the lateral margin of the facet for the scapular articulation and the length of the lateral margin of the glenoid 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 variables of this raio were measured, exemplified in an indeterminate hadrosaurid coracoid (TMP 80.29.1). Grey horizontal
lines delimit character states.