FIGURE 6.

A primate tree used by Wilkinson and Tavaré (2009) to explain their method and to obtain probability distributions on the times of origin of anthropoids (clade in red) and crown-group primates. The oldest anthropoid dates from T11 and the oldest crown primate from T13 (Table 1). Thus, the unknown gaps in the earliest fossil record of primates and anthropoids, here denoted τ and τ *, respectively, are the time intervals that need to be estimated to know the true times of origin of these two clades. The four clades denoted by alphanumeric symbols are: A, Haplorhini; B, Strepsirhini; 1, Platyrrhini; 2, Catarrhini.