Fig. 1.

Late Miocene–early Pliocene hominin species that are currently recognized in the fossil record. Columns indicate the approximate temporal distribution of each taxon. Dotted parts indicate uncertainty in the age of a taxon or the absence of fossils from that time span. The solid rectangle shows the presence of multiple contemporaneous taxa during the middle Pliocene. The dashed rectangle indicates possible hominin diversity as early as the late Miocene, if the three earliest named hominin species represent different taxa.