Orientation of the craniocaudal axis of the pubic peduncle (perpendicular to its articular margin) relative to
the ischial shaft 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 an ischium of Corythosaurus intermedius (ROM 845). Horizontal lines delimit character states.