Fig. 9 in Phylogeny and evolutionary patterns of South American octodontoid rodents

Fig. 9. Graphical representation of stem-, crown-, and total-groups, and related times of origin (t1 and t3) and morphological differentiation (t2) (modified from Hennig 1965: fig. 4 and Sereno 2005: fig. 1). Note that in clade A (exemplified by Ctenomyinae and Abrocomidae), t2 and t3 are decoupled while in clade B (exemplified by Octodontinae) they are coincident.