Boxplot showing the distribution of the ratio between the width of the humerus across the distal fourth of the
deltopectoral crest and the width of the distal shaft at the point of maximum curvature 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 a humerus of Brachylophosaurus canadensis
(CMN 8893). Grey horizontal lines delimit character states.