Character 280. Boxplot showing the distribution of the ratio between the dorsoventral width of the midshft of the ischium and the
length of the ischial shaft for a sample of iguanodontoidean ornithopods. The proximal end of the shaft is considered to be located where the dorsal
profile of the ischium begins to rise to form the base of the iliac peduncle.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 ratio were measured,
exemplified in an ishium of Parasaurolophus cyrtocristatus (FMNH P27393). Horizontal lines delimit character states.