Figure 1 | Partial representation of the mammalian supertree showing the relationships among the families (following ref. 23). All orders are labelled and major lineages are coloured as follows: black, Monotremata; orange, Marsupialia; blue, Afrotheria; yellow, Xenarthra; green, Laurasiatheria; and red, Euarchontoglires. Families that were reconstructed as non-monophyletic are represented multiple times and numbered accordingly. Branch lengths are proportional to time, with the K/T boundary indicated by a black, dashed circle. The scale indicates Myr. The base tree was drawn using FigTree v1.0 (http://evolve.zoo.ox.ac.uk/software.html?id=figtree).

O. Bininda-Emonds, M. Cardillo, K. Jones, R. MacPhee, R. Beck, R. Grenyer, S. Price, R. Vos, J. Gittleman, and A. Purvis. The delayed rise of present-day mammals. Nature, 446:507-512, March 29, 2007.