highly significantp < 0.001
The derived traversodontid Exaeretodon differs from all groups, extinct and extant in having both a low CER and a high DSR. Following correction for body mass in a phylogenetic context and Box-Cox transformation, a MANOVA of DSR and CER across the five groups of amniote investigated (non-hypsodont crown mammals, hypsodont crown mammal, diapsid, mammaliamorph and non-probainognathian cynodont) is highly significant (Wilks' statistic = 0.169, F 8, 66 = 11.8, p < 0.001) and confirms these differences between groups.